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NL2029061A - Device and method for low-disturbance hole forming of bolt/cable hole in weak mudstone - Google Patents

Device and method for low-disturbance hole forming of bolt/cable hole in weak mudstone Download PDF

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Publication number
NL2029061A
NL2029061A NL2029061A NL2029061A NL2029061A NL 2029061 A NL2029061 A NL 2029061A NL 2029061 A NL2029061 A NL 2029061A NL 2029061 A NL2029061 A NL 2029061A NL 2029061 A NL2029061 A NL 2029061A
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NL
Netherlands
Prior art keywords
hole
drill rod
drill
external
forming
Prior art date
Application number
NL2029061A
Other languages
Dutch (nl)
Other versions
NL2029061B1 (en
Inventor
Kang Yongshui
Hou Junyou
Hou Congcong
Zhang Rui
Sun Xingping
Wang Hongtao
Chen Jianben
Liu Jingyi
Liu Bin
Original Assignee
Inst Rock & Soil Mech Cas
Guqiao Coal Mine Of Huainan Mining Ind Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inst Rock & Soil Mech Cas, Guqiao Coal Mine Of Huainan Mining Ind Group Co Ltd filed Critical Inst Rock & Soil Mech Cas
Publication of NL2029061A publication Critical patent/NL2029061A/en
Application granted granted Critical
Publication of NL2029061B1 publication Critical patent/NL2029061B1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18—Pipes provided with plural fluid passages
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/002—Drilling with diversely driven shafts extending into the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/003—Drilling with mechanical conveying means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/003—Drilling with mechanical conveying means
    • E21B7/005—Drilling with mechanical conveying means with helical conveying means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

The present disclosure relates to a device and method for low-disturbance hole forming of a bolt/cable hole in a weak mudstone. The device includes: a plurality of sections of hollow and mutually connected external drill rods, one end of the external drill rod being provided with a hole-forming drill bit, an internal drill rod, the internal drill rod being installed in the external drill rod and being capable of rotating along an axis of the external drill rod, and the internal drill rod being internally provided with a water flow channel in a length direction of the internal drill rod and being provided with a spiral fin, and a crushing drill bit, the crushing drill bit being installed at one end of the internal drill rod relatively close to the hole-forming drill bit, the crushing drill bit being provided with a water outlet hole.

Description

DEVICE AND METHOD FOR LOW-DISTURBANCE HOLE FORMING OF BOLT/CABLE HOLE IN WEAK MUDSTONE
TECHNICAL FIELD The present disclosure relates to the field of bolt/cable installation and hole making engineering of tunnel engineering, and in particular, to a device and method for low-disturbance hole forming of a bolt/cable hole in a weak mudstone.
BACKGROUND ART In tunnel construction, a pneumatic rock drill is often used to add water and flush during a bolt-anchor cable hole making process to cool down and discharge slag. A weak mudstone is often encountered with in tunnel construction. In this case, it is not suitable to use a method of directly adding water and flushing to cool down and discharge slag. This is mainly because water flows into the bottom of a hole through a drill rod and then flows out through a gap between the drill rod and a hole wall during the process of adding water and flushing by a conventional pneumatic rock dnll, so that a large number of surrounding rocks are immersed in water, and the mudstone quickly softens or even expands when encountered with water. This not only aggravates the difficulty of slag discharge, but also is very unfavorable to subsequent control over stability of the surrounding rocks.
SUMMARY In view of the above-mentioned problems, a device and method for low-disturbance hole forming of a bolt/cable hole in a weak mudstone are provided to improve hole making efficiency through auxiliary slag discharge inside a drill rod and flushing and cooling of a passage in the drill rod. The specific technical solution is as follows: According to a first aspect of the present disclosure, provided is a device for low-disturbance hole forming of a bolt/cable hole in a weak mudstone, including: a plurality of sections of hollow and mutually connected external drill rods, one end of the external drill rod being provided with a hole-forming drill bit; an internal drill rod, the internal drill rod being installed in the external drill rod and being capable of rotating along an axis of the external drill rod, and the internal drill rod being internally provided with a water flow channel in a length direction of the internal drill rod and being provided with a spiral fin; and a crushing drill bit, the crushing drill bit being installed at one end of the internal drill rod relatively close to the hole-forming drill bit, the crushing drill bit being provided with a water outlet hole, and the water outlet hole being communicated with the water flow channel.
In the device for low-disturbance hole forming, further, the crushing drill bit is further provided with a plurality of spiral grooves.
In the device for low-disturbance hole forming, further, one end of the external drill rod is provided with a first threaded joint, the other end of the external drill rod is provided with a second threaded joint, and the hole-forming drill bit is spirally installed on the external drill rod through the first threaded joint.
The device for low-disturbance hole forming further includes a plurality of support rods and a plurality of support bearings, where the support bearings are installed on the internal drill rod at intervals, one end of each of the support rods is installed on an inner wall of the external drill rod, and the other end of the support rod extends and is connected to a bearing outer ring of the support bearing.
In the device for low-disturbance hole forming, further, the support bearings each are a conical bearing.
In the device for low-disturbance hole forming, further, the hole-forming drill bit is made of diamond. According to a second aspect of the present disclosure, provided is a method for hole forming by using the above-mentioned device for low-disturbance hole forming, including the following steps: S1: connecting several sections of external drill rods according to a depth requirement; S2: injecting cooling water into a water flow channel, so that water flows out through the water flow channel and a water outlet in sequence, so as to cool a hole-forming drill bit and a crushing drill bit; S3: separately driving the external drill rod and an internal drill rod to rotate reversely, so that crushed mudstone slag is flushed out of the external drill rod by the reverse rotation of a spiral fin 5 while the hole-forming drill bit is used to rotatably crush rock and drill to form a hole; and S4: drilling a hole to a design depth. The above-mentioned solution has the following beneficial effects: (1) In the present disclosure, the drill bit is cooled in the form of making water flow in from the internal drill rod and making water flow out from between the internal drill rod and an inner wall of the external drill rod, and the cooling form can solve the problem that the strength of surrounding rocks in a hole wall is reduced or even the surrounding rocks are softened and collapsed due to the immersion of a large amount of surrounding rocks in water. (2) In the present disclosure, the internal drill rod is provided with a spiral fin structure to discharge slag from the inside of the external drill rod, so as to achieve higher slag discharge efficiency than that of a conventional flushing and slag discharge method alone.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural diagram of a device for low-disturbance hole forming provided in an embodiment of the present disclosure; and FIG. 2 is a schematic cross-sectional structural diagram taken along A-A in FIG. 1. Reference signs in the drawings: 1. external drill rod; 2. hole-forming drill bit; 3. internal drill rod; 4. water flow channel; 5. spiral fin; 6. crushing drill bit; 7. water outlet hole; 8. spiral groove; 9. first threaded joint; 10. second threaded joint; 11. support rod; 12. support bearing,
DETAILED DESCRIPTION OF THE EMBODIMENTS The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. It should be noted that the embodiments of the present disclosure and the features in the embodiments may be combined with each other provided that no conflict occurs.
The present disclosure will be further described below with reference to accompanying drawings and specific embodiments, but it is not used as a limitation to the present disclosure. FIG. 1 is a schematic structural diagram of a device for low-disturbance hole forming provided in an embodiment of the present disclosure; and FIG. 2 is a schematic cross-sectional structural diagram taken along A-A in FIG. 1. As shown in FIG. 1 and FIG. 2, the device for low-disturbance hole forming provided in the embodiment of the present disclosure includes: a plurality of sections of hollow and mutually connected external drill rods 1, one end of the external drill rod 1 being provided with a hole-forming drill bit 2 (made of diamond); an internal drill rod 3, the internal drill rod 3 being installed in the external drill rod 1 and being capable of rotating along an axis of the external drill rod 1, and the internal drill rod 3 being internally provided with a water flow channel 4 in a length direction of the internal drill rod 3 and being provided with a spiral fin 5; and a crushing drill bit 6, the crushing drill bit 6 being installed at one end of the internal drill rod 3 relatively close to the hole-forming drill bit 2, the crushing drill bit 6 being provided with a water outlet hole 7, and the water outlet hole 7 being communicated with the water flow channel 4.
In the present disclosure, a rod tail joint may be installed on the internal drill rod 3 so as to provide a point of force application for a driving device while the rod tail joint is used to supply water to the water flow channel 4 in the internal drill rod 3.
In the present disclosure, when the external drill rod 1 and the internal drill rod 3 are driven by the corresponding driving device and rotate reversely, a hole can be formed by drilling.
During the hole forming, crushed mudstone slag is flushed out of the external drill rod 1 by the reverse rotation of the spiral fin 5.
In the present disclosure, when the hole-forming drill bit 2 and the crushing drill bit 6 are used for drilling to form a hole, the drill bits are cooled by water flowing through the water flow channel 4 and the water outlet hole 7 in sequence. After cooling, the water flows out through a gap between the external drill rod 1 and the internal drill rod 3. Compared with a conventional flushing and slag discharge method, the cooling method can protect surrounding rocks in a hole wall from strength reduction or even softening and collapse caused by the immersion of a large number of surrounding rocks by water.
5 Specifically, in the present disclosure, one end of the external drill rod 1 is provided with a first threaded joint 9, and the other end of the external drill rod 1 is provided with a second threaded joint 10. In the present disclosure, the hole-forming drill bit 2 is spirally installed on the external drill rod 1 through the first threaded joint 9, and upper and lower adjacent external drill rods 1 can be mutually connected by using the above-mentioned threaded joints to meet a use requirement for different drilling depths. Specifically, in the present disclosure, the device for hole forming further includes a plurality of support rods 11 and a plurality of support bearings 12. In the present disclosure, the support bearings 12 (which each may be a conical bearing) are installed on the internal drill rod 3 at intervals, one end of each of the support rods 11 is installed on an inner wall of the external drill rod 1, and the other end of the support rod 11 extends and is connected to a bearing outer ring of the support bearing 12. Based on the above-mentioned technical solution, further, in the device for low-disturbance hole forming provided in this embodiment, the crushing drill bit 6 is further provided with a plurality of spiral grooves 8, so as to crush mudstone. In the present disclosure, a method for hole forming by using the above-mentioned device for low-disturbance hole forming includes the following steps. S1: Connect several sections of external drill rods 1 according to a depth requirement. S2: Inject cooling water into a water flow channel 4, so that water flows out through the water flow channel 4 and a water outlet in sequence, so as to cool a hole-forming drill bit 2 and a crushing drill bit 6. S3: Separately drive the external drill rod 1 and an internal drill rod 3 to rotate reversely, so that crushed mudstone slag is flushed out of the external drill rod 1 by the reverse rotation of a spiral fin 5 while the hole-forming drill bit 2 is used to rotatably crush rock and drill to form a hole.
S4: Drill a hole to a design depth.
The above are only preferred embodiments of the present disclosure, and do not therefore limit the implementations and protection scope of the present disclosure.
Those skilled in the art should be aware that all solutions obtained by equivalent replacements and apparent changes made by using the specification and illustrations of the present disclosure shall fall within the protection scope of the present disclosure.

Claims (7)

ConclusiesConclusions 1. Een apparaat voor het vormen van een gat van een schroef/kabelgat in een zwakke kleisteen met weinig overlast, dat het volgende omvat: 3 een verscheidenheid aan delen van holle en onderling verbonden externe boorstangen (1), waarbij een uiteinde van de externe boorstang (1) van een gatvormende boor (2) wordt voorzien; een interne boorstang (3), waarbij de interne boorstang (3) in de externe boorstang (1) wordt geïnstalleerd en kan roteren rond een as van de externe boorstang (1), en waarbij de interne boorstang (3) intern van een waterstroomkanaal (4) in een lengterichting van de interne boorstang (3) wordt voorzien en van een spiraalvin (5) wordt voorzien; en een breekboor (6), waarbij de breekboor (6) op een uiteinde van de interne boorstang (3) relatief dicht bij de gatvormende boor (2) wordt geïnstalleerd, waarbij de breekboor (6) van een waterafvoergat (7) wordt voorzien en het waterafvoergat (7) met het waterstroomkanaal (4) in contact wordt gebracht.An apparatus for forming a screw/cable hole hole in a weak clay brick with little nuisance, comprising: 3 a variety of sections of hollow and interconnected external drill rods (1), one end of the external drill rod (1) is provided with a hole-forming drill (2); an internal drill rod (3), wherein the internal drill rod (3) is installed in the external drill rod (1) and can rotate about an axis of the external drill rod (1), and wherein the internal drill rod (3) is internal to a water flow channel ( 4) provided in a longitudinal direction of the internal drill rod (3) and provided with a spiral fin (5); and a breaker (6), the breaker (6) being installed on one end of the internal drill rod (3) relatively close to the hole-forming drill (2), the breaker (6) being provided with a water drainage hole (7) and the water discharge hole (7) is brought into contact with the water flow channel (4). 2. Het apparaat voor het vormen van gaten met weinig overlast volgens conclusie 1, waarbij de breekboor (6) verder van een verscheidenheid aan spiraalgroeven (8) wordt voorzien.The low-burden hole forming apparatus according to claim 1, wherein the fringe drill (6) is further provided with a plurality of spiral grooves (8). 3. Het apparaat voor het vormen van gaten met weinig overlast volgens conclusie 1 of 2, waarbij een uiteinde van de externe boorstang (1) van een eerste schroefverbinding (9) wordt voorzien, het andere uiteinde van de externe boorstang (1) van een tweede schroefverbinding (10) wordt voorzien en de gatvormende boor (2) via de eerste schroefverbinding (9) spiraalvormig op de externe boorstang (1) wordt geïnstalleerd.The low-noise hole forming apparatus according to claim 1 or 2, wherein one end of the external drill rod (1) is provided with a first screw connection (9), the other end of the external drill rod (1) with a second screw connection (10) is provided and the hole-forming drill bit (2) is spirally installed on the external drill rod (1) via the first screw connection (9). 4. Het apparaat voor het vormen van gaten met weinig overlast volgens conclusie 3, dat verder een verscheidenheid aan steunstangen (11) en een verscheidenheid aan steunlagers (12) omvat, waarbij de steunlagers (12) met intervallen op de interne boorstang (3) worden geïnstalleerd, een uiteinde van elke steunstang (11) op een binnenwand van de externe boorstang (1) wordt geïnstalleerd en het andere uiteinde van de steunstang (11) uitrekt en met een dragende buitenste ring van de steunlager (12) is verbonden.The low-burden hole forming apparatus of claim 3, further comprising a variety of support rods (11) and a variety of support bearings (12), the support bearings (12) at intervals on the internal drill rod (3) installed, one end of each support rod (11) is installed on an inner wall of the external drill rod (1) and the other end of the support rod (11) is stretched and connected to a bearing outer ring of the support bearing (12). 5. Het apparaat voor het vormen van gaten met weinig overlast volgens conclusie 4, waarbij de steunlagers (12) elk een conische lager zijn.The low-burden hole forming apparatus according to claim 4, wherein the support bearings (12) are each a conical bearing. 6. Het apparaat voor het vormen van gaten met weinig overlast volgens conclusie 4 of 5, waarbij de gatvormende boor (2) van diamant is gemaakt.The low-noise hole forming apparatus according to claim 4 or 5, wherein the hole forming drill (2) is made of diamond. 7. Een methode voor het vormen van een gat van een schroef/kabelgat in een zwakke kleisteen volgens een van de conclusies 1 tot 6, die de volgende stappen omvat: S1: verschillende delen van de externe boorstangen (1) verbinden volgens een vereiste voor een boordiepte; S2: koelwater in een waterstroomkanaal (4) injecteren, zodat er achtereenvolgens water door het waterstroomkanaal (4) en een wateruitlaat stroomt, om zo een gatvormende boor (2) en een breekboor (6) af te koelen; S3: de externe boorstang (1) en een interne boorstang (3) apart aandrijven om in tegengestelde richting te roteren, zodat gebroken kleisteenslak uit de externe boorstang (1) wordt gespoeld door de tegengestelde rotatie van de spiraalvin (5), terwijl de gatvormende boor (2) wordt gebruikt om roterend steen te breken en te boren om een gat te vormen; en S4: een gat boren in een ontwerpdiepte.A method of forming a screw/cable hole hole in a weak clay brick according to any one of claims 1 to 6, comprising the steps of: S1 : connecting different parts of the external drill rods (1) according to a requirement for a drilling depth; S2: injecting cooling water into a water flow channel (4) so that water flows successively through the water flow channel (4) and a water outlet, so as to cool a hole-forming drill (2) and a fringe drill (6); S3: Separately drive the external drill rod (1) and an internal drill rod (3) to rotate in opposite directions, so that crushed clay slag is flushed out of the external drill rod (1) by the opposite rotation of the spiral fin (5), while the hole-forming drill (2) is used to break and drill rotary rock to form a hole; and S4: drilling a hole at a design depth.
NL2029061A 2020-08-31 2021-08-26 Device and method for low-disturbance hole forming of bolt/cable hole in weak mudstone NL2029061B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010897671.8A CN111877981A (en) 2020-08-31 2020-08-31 A low-disturbance hole-forming device and method for weak mudstone bolt/cable hole

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NL2029061A true NL2029061A (en) 2022-04-29
NL2029061B1 NL2029061B1 (en) 2023-10-11

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NL2029061B1 (en) 2023-10-11
CN111877981A (en) 2020-11-03

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