CN106703887A - Method of judging secondary gas explosion in mine thermodynamic disaster relief - Google Patents
Method of judging secondary gas explosion in mine thermodynamic disaster relief Download PDFInfo
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- 238000004880 explosion Methods 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000007613 environmental effect Effects 0.000 claims abstract 4
- 239000007789 gas Substances 0.000 claims description 323
- 239000001301 oxygen Substances 0.000 claims description 95
- 229910052760 oxygen Inorganic materials 0.000 claims description 95
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 94
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 60
- 238000012544 monitoring process Methods 0.000 claims description 47
- 230000008859 change Effects 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims 1
- 230000002085 persistent effect Effects 0.000 claims 1
- 238000013077 scoring method Methods 0.000 claims 1
- 230000001052 transient effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000003694 hair properties Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 naked light fire Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a method of judging secondary gas explosion in mine thermodynamic disaster relief; the method comprises the steps of I, determining a secondary gas explosion position; II, estimating time for secondary gas explosion to occur in the monitored area, to be specific, 201, acquiring environmental parameters of the monitored area, 202, judging whether the monitored area is an area experiencing high-concentration gas explosion or not, 203, estimating time and probability for the high-concentration gas explosion to occur and 204, estimating time and probability for low-concentration gas explosion; III, estimating time for the secondary gas explosion to occur in the monitored area; IV, displaying and storing in real time, judgment results for the secondary gas explosion. The method of the invention is novel in design, can judge the three key indexes, time, probability and position, of secondary gas explosion in a coal mine, and can provide theoretical reference and guidance for commanding and decision-making for thermodynamic disaster relief.
Description
Technical field
The invention belongs to mine heat power disaster assistance technical field, and in particular to a kind of mine heat power disaster assistance mistake
Secondary cases gas explosion decision method in journey.
Background technology
Mine fire and the generation evolution mechanism of gas explosion are extremely complex in the heat power disaster of colliery, in rescue operations
It may happen that various secondary disasters, such as fall of ground, Climatic regionalization, high-concentration fume, naked light fire, gas and dust explosion,
Distinguished and admirable disorderly, a large amount of toxic and harmfuls of generation, ventilating system destruction etc..The specific implementation person worked as mine rescue and place
In dangerous disaster relief forefront personnel, the Individual protection equitment of rescue team member is typically only capable to ensure it from toxic and harmful
Threaten, and to gas explosion almost without protective capacities.In rescue operations, the gas explosion of burst may result in and enter calamity
The personnel of area's rescue die, and seriously threaten the life security of rescue personnel, influence progress and the success or failure of rescue.Science, in time
Mine heat power disaster assistance commanding and decision-making is formulated on ground, and there is the life security to ensureing rescue personnel important theoretical direction to anticipate
Justice.However, the research of the mechanism and control technology of primary gas explosion is directed to existing research more, in rescue operations
Occur gas explosion mechanism and the characteristic study it is relatively fewer.After occurring due to heat power catastrophe, down-hole disaster area is divulged information often
It is in disturbance state due to the heating power and dynamic effect of disaster generation, the great ambiguity of the condition of a disaster and difficulty are predictive.Heat power disaster
Mechanism and the characteristic study progress that gas explosion occurs in rescue operations are slower, it is difficult to science, effectively instruct heat power disaster
The commanding and decision-making work of rescue.Therefore, Secondary cases gas explosion during a kind of mine heat power disaster assistance is nowadays lacked
The characteristics of decision method, formation condition and mine gas explosion according to gas explosion and rule, and combine mine heat power
Rule characteristic, can determine that time of origin, probability and the key index of position three of Secondary cases gas explosion, to mine heat power calamity
The commanding and decision-making of evil rescue has important theory directive significance.
The content of the invention
The technical problems to be solved by the invention are for above-mentioned deficiency of the prior art, there is provided a kind of mine heat is dynamic
Secondary cases gas explosion decision method during power disaster assistance, it is novel in design, it is possible to determine that heat power Post disaster relief process
In, there is time, probability and the key index of position three of Secondary cases gas explosion in underground coal mine, can be heat power disaster assistance
Commanding and decision-making provide theoretical reference and guidance.
In order to solve the above technical problems, the technical solution adopted by the present invention is：During mine heat power disaster assistance after
Hair property gas explosion decision method, it is characterised in that the method is comprised the following steps：
Step one, determine Secondary cases gas explosion position：Distinguish installation region by multiple key positions in mine
Simultaneously extremely be arranged in Control Room the temperature parameter real-time Transmission in the region by the temperature parameter of monitoring node collection corresponding region
Control computer, temperature parameter threshold value is set by input through keyboard module, is demarcated using control computer and is reached temperature parameter threshold
The key position of value, the position that the gas explosion of anticipation Secondary cases occurs；
Area monitoring node includes zone controller and the clock circuit and communication mould that connect with the zone controller
Block, the input of zone controller is terminated with temperature sensor, air velocity transducer, gas sensor, the monitored area for gathering
Gas density and gas flow gas monitor and the oxygen concentration of monitored area and oxygen flow for gathering
Oxygen monito；
Step 2, the time for estimating institute's monitored area generation Secondary cases gas explosion, process is as follows：
Step 201, the ambient parameter for obtaining institute monitored area：The ventilation shape of institute monitored area is monitored by air velocity transducer
State, the gas bearing capacity and oxygen content of institute monitored area are monitored by gas monitor and oxygen monito respectively；
Step 202, judge institute monitored area whether be occur high concentration gas blast region：Set by zone controller
Monitoring Parameters variation time threshold is put, according to the ambient parameter that the ambient parameter and clock circuit that are obtained in step 201 are recorded
Transformation period, whether institute monitored area is high concentration gas blast area after judging calamity, when gas monitor and oxygen monito
Institute's monitored area gas bearing capacity and oxygen content reach the time of the gas explosion limit less than the monitoring parameter change after monitoring calamity
When changing time threshold, institute monitored area is illustrated to there is high concentration gas blast area, performing step 203；Otherwise, step is performed
204；
The time Estimate that step 203, high concentration gas blast occur, process is as follows：
Step 2031, according to formulaThe differential equation is solved, high concentration gas can be obtained
Oxygen concentration changes experienced time t in blast area1Change experienced time t with methane concentration2, wherein,V is high concentration gas blast area volume, q1Mixed to flow into high concentration gas blast area
Close the flow of gas, q2It is the flow of mixed gas in outflow high concentration gas blast area, c1To flow into high concentration gas blast
The concentration of oxygen, c in region2To flow into the concentration of methane in high concentration gas blast area, c01It is primary condition t1When=0,
The initial value of oxygen concentration,It is the oxygen concentration desired value to be reached, c02It is primary condition t2When=0, methane concentration
Initial value,It is the methane concentration desired value to be reached；
Step 2032, according to formulaCalculate high concentration gas blast area oxygen after calamity
Gas concentration becomes the 12% time T for being experienced1, gas density reach the time T that LEL 5% is experienced21And gas is dense
Degree reaches the time T that UEL 16% is experienced22；
Step 2033, the time for estimating high concentration gas blast generation：When oxygen concentration becomes 12% institute in step 2032
The time T of experience1>T22When, high concentration gas blast does not occur；When oxygen concentration becomes 12% and experiences in step 2032
Between T21≤T1≤T22When, the time t that high concentration gas blast occurs meets：T1+t3≤t≤T22+t3, wherein, t3To reach gas
The gas of explosion limit runs into the time of burning things which may cause a fire disaster；When oxygen concentration becomes the 12% time T for being experienced in step 20321<T21When,
The time t that high concentration gas blast occurs meets：T21+t3≤t≤T22+t3；
The time Estimate that step 204, low concentration gas blast occur, process is as follows：
Step 2041, according to formulaThe differential equation is solved, low concentration can be obtained
Oxygen concentration changes experienced time t' in gas explosion region1Change experienced time t' with methane concentration2, wherein,V' is low concentration gas blast area volume, q'1To flow into low concentration gas blast area
The flow of interior mixed gas, q'2It is the flow of mixed gas in outflow low concentration gas blast area, c'1To flow into low concentration watt
The concentration of oxygen, c' in this blast area2To flow into the concentration of methane in low concentration gas blast area, c'01It is primary condition
t'1When=0, the initial value of oxygen concentration, c'02It is primary condition t'2When=0, the initial value of methane concentration；
Step 2042, according to formulaCalculate low concentration gas blast area after calamity
Oxygen concentration becomes the 12% time T' for being experienced1, gas density reach the time T' that LEL 5% is experienced21And watt
This concentration reaches the time T' that UEL 16% is experienced22；
Step 2043, the time for estimating low concentration gas blast generation：When oxygen concentration becomes 12% institute in step 2042
The time T' of experience1>T'22When, the time t' that low concentration gas blast occurs meets：T'21+t'3≤t'≤T'22+t'3；Work as step
Oxygen concentration becomes the 12% time T' for being experienced in rapid 204221≤T'1≤T'22When, the time that low concentration gas blast occurs
T' meets：T'21+t'3≤t'≤T'1+t'3；When oxygen concentration becomes the 12% time T' for being experienced in step 20421<T'21When,
Low concentration gas blast does not occur, wherein, t'3The time of burning things which may cause a fire disaster is run into for the gas for reaching the gas explosion limit；
Step 3, the probability for estimating institute's monitored area generation Secondary cases gas explosion：Analyzed according to methods of gas explosion fault tree
Method, the probability P=P of gas explosion1×P2×P3, wherein, P1For institute's monitored area gas concentration reaches the gas explosion limit after calamity
Probability and P1Met according to Ke Wade explosion triangles：P1=P1i, i=1~4 and P11=1>P13>P12>P14=0, P11For watt
The probability of this concentration gas explosion limit between 5%~16% and when oxygen concentration is more than 12%, P12For gas density is situated between
The probability of the gas explosion limit, P between 5%~16% and when oxygen concentration is less than 12%13For gas density more than 16% it
Between and oxygen concentration be less than 12% when the gas explosion limit probability, P14Gas explosion limit when being less than 5% for gas density
Probability, probability P12And probability P13Use expert point rating method estimated probability value, P2For institute's monitored area presence can cause after calamity
The probability of gas explosion burning things which may cause a fire disaster, P3For institute monitored area reaches the probability that the gas of the gas explosion limit and burning things which may cause a fire disaster meet after calamity；
Step 4, Secondary cases gas explosion result of determination show and real-time storage：By multiple area monitoring nodes simultaneously
Under monitoring well there is time and the probability of Secondary cases gas explosion in the key position, and by the result of determination reality of corresponding position
When transmit to control computer, by display can real time inspection result of determination, result of determination is preserved by memory in real time.
Secondary cases gas explosion decision method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
One and step 4 described in key position include working face intake, tailentry road, working face middle part, working face return
High temperature smoke affected area and close powered electricity after wind corner, main air intake belt tunnel, the generation of preceding mine heat power disaster
Device and abnormal Gas affected area.
Secondary cases gas explosion decision method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
Probability in threeWherein, N is expert's number, p12jFor the jth position gas density that is given of expert between 5%~
Between 16% and oxygen concentration be less than 12% when the gas explosion limit probability, δjIt is p12jCorresponding weight andp13j
For the jth position gas density that is given of expert more than 16% between and oxygen concentration gas explosion limit when being less than 12% probability,
δ'jIt is p13jCorresponding weight and
Secondary cases gas explosion decision method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
Probability in threeWherein, probability P21For institute's monitored area burning things which may cause a fire disaster is the probability and P of continuation burning things which may cause a fire disaster after calamity21=1, generally
Rate P22For institute's monitored area burning things which may cause a fire disaster is the probability and 0≤P of instantaneity burning things which may cause a fire disaster after calamity22≤1。
Secondary cases gas explosion decision method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
Probability P in three3=1.
The present invention has advantages below compared with prior art：
1st, the present invention distinguishes installation region monitoring node by multiple key positions in mine, while monitoring multiple closing
There is time and the probability of Secondary cases gas explosion at key position, control computer can simultaneously process multiple area monitoring nodes and adopt
The data of collection, realize the purpose simultaneously to whole monitoring mining, are easy to promote the use of.
2nd, the present invention combines the characteristics of mine heat power disaster down-hole disaster area environment and gas explosion, proposes respectively highly concentrated
After degree gas explosion and low concentration gas blast occur, the decision method of gas explosion time range, the degree of accuracy is high.
3rd, during decision method of the invention can be determined that heat power Post disaster relief, there is Secondary cases gas under mine quick-fried
Fried time, probability and the key index of position three, significant to ensureing rescue personnel's life security, feasibility is good,
Practical, popularizing application prospect is good.
In sum, the present invention is novel in design rationally, novel in design, it is possible to determine that during heat power Post disaster relief, coal
There is time, probability and the key index of position three of Secondary cases gas explosion under mine, can be the finger of heat power disaster assistance
Wave decision-making and theoretical reference and guidance are provided.
Below by drawings and Examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram that the Secondary cases gas explosion that the present invention is used judges equipment..
Fig. 2 is the schematic block circuit diagram of area monitoring node of the present invention.
Fig. 3 is the method flow block diagram of Secondary cases gas explosion decision method of the present invention.
Description of reference numerals:
1-area monitoring node；1-1-temperature sensor；1-2-air velocity transducer；
1-3-gas monitor；1-4-oxygen monito；1-5-clock circuit；
1-6-zone controller；1-7-communication module；1-8-gas sensor；
2-input through keyboard module；3-control computer；4-display；
5-memory.
Specific embodiment
As shown in figure 1, Secondary cases gas explosion decision method during mine heat power disaster assistance of the present invention, including with
Lower step：
Step one, determine Secondary cases gas explosion position：Distinguish installation region by multiple key positions in mine
Simultaneously extremely be arranged in Control Room the temperature parameter real-time Transmission in the region by the temperature parameter of the collection of monitoring node 1 corresponding region
Control computer 3, temperature parameter threshold value is set by input through keyboard module 2, is demarcated using control computer 3 and is reached temperature parameter
The key position of threshold value, the position that the gas explosion of anticipation Secondary cases occurs；
Area monitoring node 1 includes the zone controller 1-6 and clock circuit 1- connected with the zone controller 1-6
The input of 5 and communication module 1-7, zone controller 1-6 is terminated with temperature sensor 1-1, air velocity transducer 1-2, gas sensing
Device 1-8, the gas monitor 1-3 of the gas density of monitored area and gas flow and monitored for gathering for gathering
The oxygen concentration in region and the oxygen monito 1-4 of oxygen flow；
In the present embodiment, the key position include working face intake, tailentry road, working face middle part,
Working face Air return corner, main air intake belt tunnel, a preceding mine heat power disaster high temperature smoke affected area and are leaned on after occurring
Nearly powered electrical equipment and abnormal Gas affected area.
Generation gas explosion must be with the presence of burning things which may cause a fire disaster, therefore can there will be can trigger the fire location of gas explosion to see
Make the position of gas explosion again, in actual shaft production, be if causing the burning things which may cause a fire disaster of preceding mine heat power disaster
Continue burning things which may cause a fire disaster, that burning things which may cause a fire disaster exists certainly, and energy triggers gas explosion enough；If preceding mine heat power disaster is instantaneous
Burning things which may cause a fire disaster, that preceding mine heat power disaster institute monitoring section after calamity that is possible to ignite causes calamity point or according to disaster area center certain limit
Interior combustible, and turn into the burning things which may cause a fire disaster of gas explosion；Secondly, high temperature smoke felt area after preceding mine heat power disaster occurs
Domain, such as caving place, blind lane near institute monitored area after calamity, if institute monitoring section or the ventilation being connected with institute monitoring section after calamity after calamity
In network, there is high concentration gas storehouse, when institute's monitoring section high temperature smoke spreads to such region after calamity, still with enough temperature
Degree, the possible mixing fresh air of high temperature smoke, causes gas, oxygen concentration and the burning things which may cause a fire disaster in such region all to reach gas explosion in addition
Condition, it will trigger gas explosion；In addition, if there are abnormal Gas, moment in institute monitoring section after calamity in rescue operations
Gush out a large amount of gas, cause disaster area gas to reach explosion limit, if these regions have powered electrical equipment, it is possible to because electrically
Spark and trigger gas explosion, the life security of rescue team member to entering institute monitoring section after calamity threatens.
Step 2, the time for estimating institute's monitored area generation Secondary cases gas explosion, process is as follows：
Step 201, the ambient parameter for obtaining institute monitored area：The logical of institute monitored area is monitored by air velocity transducer 1-2
Wind state, the gas bearing capacity and oxygen for monitoring institute monitored area respectively by gas monitor 1-3 and oxygen monito 1-4 contains
Amount；
It should be noted that institute monitored area is any one place at the key position, in any one place's key position
One area monitoring node 1 is installed and estimates that institute monitored area occurs time and the probability of Secondary cases gas explosion, any one place closes
Key position estimates that institute monitored area occurs the time of Secondary cases gas explosion and the method all same of probability, and control computer 3 can
While key position quick-fried result of determination of Secondary cases gas during mine heat power disaster assistance in many places under monitoring well.
Step 202, judge institute monitored area whether be occur high concentration gas blast region：By zone controller 1-
6 set monitoring Parameters variation time threshold, according to the ring that the ambient parameter and clock circuit 1-5 that are obtained in step 201 are recorded
The border Parameters variation time, whether institute monitored area is high concentration gas blast area after judging calamity, when gas monitor 1-3 and oxygen
Institute's monitored area gas bearing capacity and oxygen content reach the time of the gas explosion limit less than described after gas monitor 1-4 monitoring calamities
During monitoring Parameters variation time threshold, institute monitored area is illustrated to there is high concentration gas blast area, performing step 203；It is no
Then, step 204 is performed；
It should be noted that it refers to institute monitored area after preceding mine heat power disaster occurs that high concentration gas explode
Interior gas density and oxygen concentration is increased rapidly, gas density and oxygen concentration into incremental state；Low concentration gas explode
Refer to that the gas density in institute monitored area is extremely low after preceding mine heat power disaster occurs, less than under gas density blast
Limit 5%, corresponding oxygen concentration is higher, and oxygen concentration is higher than 12%, and, in slowly incremental state, oxygen concentration is in slow for gas density
Slow decrement states, can be using air velocity transducer 1-2, temperature sensor 1-1 and gas sensor 1-8 collection Minepit environments
Judge institute monitored area whether for the region that high concentration gas blast occurs provides reference.
The time Estimate that step 203, high concentration gas blast occur, process is as follows：
Step 2031, according to formulaThe differential equation is solved, high concentration gas can be obtained
Oxygen concentration changes experienced time t in blast area1Change experienced time t with methane concentration2, wherein,V is high concentration gas blast area volume, q1Mixed to flow into high concentration gas blast area
Close the flow of gas, q2It is the flow of mixed gas in outflow high concentration gas blast area, c1To flow into high concentration gas blast
The concentration of oxygen, c in region2To flow into the concentration of methane in high concentration gas blast area, c01It is primary condition t1When=0,
The initial value of oxygen concentration,It is the oxygen concentration desired value to be reached, c02It is primary condition t2When=0, methane concentration
Initial value,It is the methane concentration desired value to be reached；
In actual production, oxygen concentration changes experienced time t in high concentration gas blast area1Become with methane concentration
Change experienced time t2Recorded by the clock circuit 1-5 in institute monitored area inner region monitoring node 1, high concentration gas are quick-fried
Fried region is any one place at the key position, and high concentration gas blast area volume V is empirical value, flows into high concentration watt
The flow q of mixed gas in this blast area1With the flow q of mixed gas in outflow high concentration gas blast area2Use gas
Body sensor 1-8 is measured, and flows into the concentration c of oxygen in high concentration gas blast area1, primary condition t1Oxygen concentration when=0
Initial value c01The desired value to be reached with oxygen concentrationMeasured by oxygen monito 1-4, flow into high concentration gas quick-fried
The concentration c of methane in fried region2, primary condition t2The initial value c of methane concentration when=002The mesh to be reached with methane concentration
Scale valueMeasured by Methane monitoring instrument 1-3.
Step 2032, according to formulaCalculate high concentration gas blast area oxygen after calamity
Gas concentration becomes the 12% time T for being experienced1, gas density reach the time T that LEL 5% is experienced21And gas is dense
Degree reaches the time T that UEL 16% is experienced22；
Step 2033, the time for estimating high concentration gas blast generation：When oxygen concentration becomes 12% institute in step 2032
The time T of experience1>T22When, high concentration gas blast does not occur；When oxygen concentration becomes 12% and experiences in step 2032
Between T21≤T1≤T22When, the time t that high concentration gas blast occurs meets：T1+t3≤t≤T22+t3, wherein, t3To reach gas
The gas of explosion limit runs into the time of burning things which may cause a fire disaster；When oxygen concentration becomes the 12% time T for being experienced in step 20321<T21When,
The time t that high concentration gas blast occurs meets：T21+t3≤t≤T22+t3；
In actual production, set by zone controller 1-6 in the high concentration gas blast area inner region monitoring node 1
The temperature sensor 1-1 temperature thresholds and rate temperature change threshold value of the high concentration gas blast area, reach gas explosion
The gas of the limit runs into the time t of burning things which may cause a fire disaster3By the record of clock circuit 1-5 in temperature sensor 1-1 temperature data change procedures
Time measures, and when the temperature data growth rate that the temperature sensor 1-1 of the high concentration gas blast area is gathered is slow, reaches
The gas of the gas explosion limit runs into temperature sensor 1-1 temperature threshold of the time of burning things which may cause a fire disaster by setting and determines, reaches temperature biography
During sensor 1-1 temperature thresholds, the rescue team member into institute monitoring section after calamity is reminded to take care in time；When the high concentration gas are quick-fried
When the temperature data growth rate of the temperature sensor 1-1 collections in fried region is very fast, the gas for reaching the gas explosion limit runs into
The time of burning things which may cause a fire disaster is determined by the temperature sensor 1-1 rate temperature change threshold values for setting, should reminded into institute monitoring section after calamity
Rescue team member carry out at once it is hidden save oneself, hide the harm that Secondary cases gas explosion brings.
The time Estimate that step 204, low concentration gas blast occur, process is as follows：
Step 2041, according to formulaThe differential equation is solved, low concentration can be obtained
Oxygen concentration changes experienced time t' in gas explosion region1Change experienced time t' with methane concentration2, wherein,V' is low concentration gas blast area volume, q'1To flow into low concentration gas blast area
The flow of interior mixed gas, q'2It is the flow of mixed gas in outflow low concentration gas blast area, c'1To flow into low concentration watt
The concentration of oxygen, c' in this blast area2To flow into the concentration of methane in low concentration gas blast area, c'01It is primary condition
t'1When=0, the initial value of oxygen concentration, c'02It is primary condition t'2When=0, the initial value of methane concentration；
In actual production, oxygen concentration changes experienced time t' in low concentration gas blast area1And methane concentration
The experienced time t' of change2Recorded by the clock circuit 1-5 in institute monitored area inner region monitoring node 1, low concentration watt
This blast area is any one place at the key position, and low concentration gas blast area volume V is empirical value, is flowed into low dense
The flow q' of mixed gas in degree gas explosion region1With the flow q' of mixed gas in outflow low concentration gas blast area2
Measured using gas sensor 1-8, flow into low concentration gas blast area in oxygen concentration c '1With primary condition t'1When=0
Oxygen concentration initial value c'01Measured by oxygen monito 1-4, flow into the concentration of methane in low concentration gas blast area
c'2With primary condition t'2The initial value c' of methane concentration when=002Measured by Methane monitoring instrument 1-3.
Step 2042, according to formulaCalculate low concentration gas blast area after calamity
Oxygen concentration becomes the 12% time T' for being experienced1, gas density reach the time T' that LEL 5% is experienced21And watt
This concentration reaches the time T' that UEL 16% is experienced22；
Step 2043, the time for estimating low concentration gas blast generation：When oxygen concentration becomes 12% institute in step 2042
The time T' of experience1>T'22When, the time t' that low concentration gas blast occurs meets：T'21+t'3≤t'≤T'22+t'3；Work as step
Oxygen concentration becomes the 12% time T' for being experienced in rapid 204221≤T'1≤T'22When, the time that low concentration gas blast occurs
T' meets：T'21+t'3≤t'≤T'1+t'3；When oxygen concentration becomes the 12% time T' for being experienced in step 20421<T'21When,
Low concentration gas blast does not occur, wherein, t'3The time of burning things which may cause a fire disaster is run into for the gas for reaching the gas explosion limit；
In actual production, set by zone controller 1-6 in the low concentration gas blast area inner region monitoring node 1
The temperature sensor 1-1 temperature thresholds and rate temperature change threshold value of the low concentration gas blast area, reach gas explosion
The gas of the limit runs into the time t' of burning things which may cause a fire disaster3By the record of clock circuit 1-5 in temperature sensor 1-1 temperature data change procedures
Time measures, and when the temperature data growth rate that the temperature sensor 1-1 of the low concentration gas blast area is gathered is slow, reaches
The gas of the gas explosion limit runs into temperature sensor 1-1 temperature threshold of the time of burning things which may cause a fire disaster by setting and determines, reaches temperature biography
During sensor 1-1 temperature thresholds, the rescue team member into institute monitoring section after calamity is reminded to take care in time；When the low concentration gas are quick-fried
When the temperature data growth rate of the temperature sensor 1-1 collections in fried region is very fast, the gas for reaching the gas explosion limit runs into
The time of burning things which may cause a fire disaster is determined by the temperature sensor 1-1 rate temperature change threshold values for setting, should reminded into institute monitoring section after calamity
Rescue team member carry out at once it is hidden save oneself, hide the harm that Secondary cases gas explosion brings.
Step 3, the probability for estimating institute's monitored area generation Secondary cases gas explosion：Analyzed according to methods of gas explosion fault tree
Method, the probability P=P of gas explosion1×P2×P3, wherein, P1For institute's monitored area gas concentration reaches the gas explosion limit after calamity
Probability and P1Met according to Ke Wade explosion triangles：P1=P1i, i=1~4 and P11=1>P13>P12>P14=0, P11For watt
The probability of this concentration gas explosion limit between 5%~16% and when oxygen concentration is more than 12%, P12For gas density is situated between
The probability of the gas explosion limit, P between 5%~16% and when oxygen concentration is less than 12%13For gas density more than 16% it
Between and oxygen concentration be less than 12% when the gas explosion limit probability, P14Gas explosion limit when being less than 5% for gas density
Probability, probability P12And probability P13Use expert point rating method estimated probability value, P2For institute's monitored area presence can cause after calamity
The probability of gas explosion burning things which may cause a fire disaster, P3For institute monitored area reaches the probability that the gas of the gas explosion limit and burning things which may cause a fire disaster meet after calamity；
In the present embodiment, probability in step 3Wherein, N is expert's number, p12jIt is jth position expert
The probability of the gas density for being given gas explosion limit between 5%~16% and when oxygen concentration is less than 12%, δjIt is p12j
Corresponding weight andp13jFor the jth position gas density that is given of expert more than 16% between and oxygen concentration be less than
The probability of the gas explosion limit, δ when 12%j' it is p13jCorresponding weight and
In the present embodiment, probability in step 3Wherein, probability P21For institute's monitored area burning things which may cause a fire disaster is lasting after calamity
The probability and P of property burning things which may cause a fire disaster21=1, probability P22For institute's monitored area burning things which may cause a fire disaster is the probability and 0≤P of instantaneity burning things which may cause a fire disaster after calamity22≤1。
In actual production, continuation burning things which may cause a fire disaster refers to after triggering heat power disaster for the first time, exist for a long time and can draw
The burning things which may cause a fire disaster of energy, such as naked light fire etc., the disaster caused by this burning things which may cause a fire disaster, it is believed that secondary burning things which may cause a fire disaster is deposited needed for hair gas explosion
Probability be 1, i.e. probability P21=1；Instantaneity burning things which may cause a fire disaster refers to the burning things which may cause a fire disaster of pop-off after triggering heat power disaster for the first time,
Such as electric spark.
In the present embodiment, probability P in step 33=1.
In actual production, due to the complexity and ambiguity of heat power disaster, rescue personnel often cannot accurately grasp very
Real the condition of a disaster information, therefore, it is impossible to judge that detonable mixed gas have much with the probability of burning things which may cause a fire disaster, in actual rescue work
In, consider from maximum security, it is believed that it necessarily occurs, i.e. probability P3=1, for on-the-spot rescue team member's life security
Consider, in order to prevent the further expansion of accident, in rescue, as long as we are generally acknowledged that disaster area, gas reaches explosion limit,
Just be bound to probability P=P that gas explosion, i.e. gas explosion occur1。
Step 4, Secondary cases gas explosion result of determination show and real-time storage：By multiple area monitoring nodes 1 simultaneously
Under monitoring well there is time and the probability of Secondary cases gas explosion in the key position, and by the result of determination reality of corresponding position
When transmit to control computer 3, by display 4 can real time inspection result of determination, by memory 5 in real time preserve judge knot
Really.
In the present embodiment, communication module 1-7 in multiple area monitoring nodes 1 by the way of wired or wireless with control
Computer 3 communicates, and the time of underground many places key position generation Secondary cases gas explosion and probability results can be uploaded into calculating
Machine 3, memory 5 preserves result of determination for the commanding and decision-making of heat power disaster assistance provides theoretical reference and guidance in real time.
The above, is only presently preferred embodiments of the present invention, and not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (5)
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