CN108051566A - A kind of gushing water experimental rig and its test method - Google Patents

Abstract

The invention discloses a water inrush test device and a test method thereof. It comprises a water tank and a model box. A water storage tank is arranged at the bottom of the model box. Several monitoring elements are arranged on the outer wall of the model box. The top of the water storage tank has a Channel-changing partitions and partitions, water-permeable panels are arranged above the variable-channel partitions and partitions, a booster pump and a constant pressure valve are connected between the water tank and the water storage tank through a water injection pipeline, and the outlet of the booster pump There is a pressure gauge on the pipeline, and a heating device is installed on the inside of the bottom of the water tank. There are several water inlet holes on the side wall of the water storage tank. There is a plate inlet between the side wall of the water storage tank and the variable channel partition. There is a drain valve on the bottom of the plate mouth. It can achieve different test temperatures and water pressures, as well as water inrush phenomena under different water inrush flow rates. This device can perform water inrush tests on different test materials. It has a simple structure and complete functions.

Description

A water inrush test device and test method thereof

technical field

The invention relates to a water inrush test device, in particular to a water inrush test device and a test method thereof, belonging to the technical field of hydrogeology research.

Background technique

Complex geological conditions are the difficulty for us to solve underground geological problems. For the occurrence conditions of groundwater, there are different forms of storage spaces and channels, including voids, fissures, and caves. Mine water inrush is a difficult problem to solve in mining engineering. It has the particularity and complexity of various sites. To study its working principle and solution, it is necessary to simulate the conditions and causes of various sites. In the prior art Generally, similar simulation tests of water inrush are carried out in the laboratory, but the simulation experiments basically adopt the plane stress model. However, the simulation experiments were all single-hole water injection, which did not take into account the influence of single water injection on the pressure inhomogeneity during the loading process, nor did it take into account the influence of the shape of the water inrush channel on the water inrush. In the process of mine mining, the underground depth can reach 300 ~700m, the underground temperature increases with the increase of buried depth. In the previous test conditions, there were few adjustable parameters, and the temperature of the test could not be adjusted, and the combined effect of temperature and pressure could not accurately and efficiently simulate the underground water inrush at various depths. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a test device for water injection with variable temperature and pressure for indoor water inrush simulation test and a test device that can change water passage through porous water injection, which can achieve different test temperatures and water pressures, and different The water inrush phenomenon under the water inrush flow rate can be uniformly loaded to the test material through multiple water inlet holes at the same time; by changing the shape of the water passage on the top of the water storage tank to test, this device can be used for different situations. The simulated water inrush test has a simple structure and complete functions, and solves the above-mentioned existing problems.

The technical solution of the present invention is: a water inrush test device, which includes a water tank and a model box, the bottom of the model box has a water storage tank, the outer wall of the model box is provided with a number of monitoring elements, and the top of the water storage tank has a variable Channel partitions and partitions, variable channel partitions and partitions are provided with water-permeable plates, a booster pump and a constant pressure valve are connected between the water tank and the water storage tank through a water injection pipeline, and the outlet pipeline of the booster pump There is a pressure gauge on the top of the water tank, and a heating device is provided on the inside of the bottom of the water tank. There are a number of water inlet holes on the side wall of the water storage tank. There is a plate inlet between the side wall of the water storage tank and the variable channel partition. There is a drain valve at the bottom of the port.

The side wall of the water tank is provided with a temperature controller, the temperature controller is connected with the heating device, the side wall of the water tank is provided with a liquid level gauge, the size of the water tank is 1m×1m×1m, and the material is high strength, durable Low carbon steel with high temperature, long life and good corrosion resistance.

The size of the water injection pipeline is: the inner diameter is 20mm, the outer diameter is 30mm, and the material is low carbon steel for the inner ring and aluminum-plastic pipe for the outer ring.

The outer wall of the model box is fixedly connected with reinforcing ribs, the reinforcing ribs are channel steel or angle steel, the size of the model box is 1m×2m×2m, and the material is high strength, high temperature resistance, long life and good corrosion resistance Low-carbon steel.

The permeable plate is provided with a number of evenly distributed through holes, and the material of the permeable plate is low-carbon steel with high strength, high temperature resistance, long life and good corrosion resistance, and the size is 1m×2m×0.01m.

There are several forms of through holes on the variable channel partition plate. The variable channel partition plate enters the middle of the top of the water storage tank from the inlet opening in the middle of the side wall of the water storage tank, and fits and seals with the water baffle plate. The size of the variable channel partition plate is 0.7m ×1m×0.01m, the material of the variable channel partition is low carbon steel.

The water baffle is an impermeable board. The water baffle is divided into two pieces and fixed on both sides of the top of the water storage tank. It fits with the variable channel partition and is airtight. Its size is 0.65m×1m×0.01m. The material of the water baffle is For low carbon steel.

The booster pump is a piston pump or a screw pump.

The heating device is electric heating.

A test method for a water inrush test device, comprising the following eight steps:

1. Assemble the model test system: fill the test material into the interior of the model box according to the test requirements, and arrange the monitoring components according to the test requirements;

2. Start the heating device and set the water temperature required for the test through the temperature controller;

3. Close the drain valve at the bottom of the water storage tank, open the constant pressure valve and set the pressure required for the test;

4. Insert the deformation channel partition into the top of the water storage tank through the plate inlet according to the test requirements;

5. Turn on the pressurization pump, and the water in the water tank will be injected into the water storage tank through the water injection pipeline through the constant pressure valve and the water inlet hole;

6. After the water injection reaches the rated pressure, the pressurization pump automatically stops pressurization, and observes the changes of mechanical parameters such as osmotic pressure, displacement and deformation of the test material in the model box under the condition of partial pressurization at the bottom;

7. Drainage after the test: When the test is over, open the drain valve to drain the water in the water storage tank;

8. Repeat the test: re-set the water temperature through the temperature controller, adjust the pressure through the constant pressure valve and replace the variable channel partition, and then perform the combined repeated test.

The beneficial effect of the present invention is: compared with the existing device, the present invention adds an electric heating device inside the water injection tank under the original single water pressure factor control test device, and a temperature controller is connected outside the water tank, By setting the rated temperature, keep the water temperature at the temperature required by the test. In addition, in terms of pressure control, it is improved to a constant pressure valve integrated with a pressure gauge and a pressure valve, which can effectively prevent the pressurized backflow of water, accurately control the accuracy of loading, and make installation and operation more convenient and simple. Through the above-mentioned structural improvements, it is now possible to simulate different water temperatures and pressures in water inrush experiments, because groundwater temperature is positively correlated with buried depth, and now it is possible to simulate water inrush tests at different depths through different temperatures and pressures; temperature affects the internal energy of water , different temperatures can be tested to reflect the degree of damage to the test material at different water temperatures. It has achieved good results in improving the accuracy of simulation tests. It can accurately and efficiently complete the variable temperature and water pressure loading of the model test. Compared with the prior art, the present invention adopts the above technical scheme, on the basis of the original single-hole water injection, by adding several water injection holes on the outside of the water storage tank, and injecting water into the water storage tank at the same time, which improves the water injection speed and optimizes the loading at the same time The uniformity of the test material can keep the water pressure stable during the deformation stage of the test material. Compared with the original baffle, the present invention can make various forms of water passages required by the test through the above technical solutions, can simulate complex geological conditions such as gaps, cracks, caves, faults, etc., and can also change the size of the passage The area can achieve better results in improving the accuracy of the simulation test.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings of this specification.

Embodiment 1: As shown in accompanying drawing 1, a kind of water inrush test device, it comprises water tank 15 and model box 1, and the bottom of described model box 1 has water storage tank 17, and the outer wall of model box 1 is provided with some monitoring elements 2. The top of the water storage tank 17 has a channel-changing partition 5 and a partition 6, and a water-permeable plate 4 is arranged on the top of the channel-changing partition 5 and the partition 6, and the water injection pipeline is passed between the water tank 15 and the water storage tank 17 16 is connected with a booster pump 11 and a constant pressure valve 10, the outlet pipeline of the booster pump 11 is provided with a pressure gauge 10, the inner side of the bottom of the water tank 15 is provided with a heating device 14, and the side wall of the water storage tank 17 has a Some water inlet holes 9, a board inlet 7 is arranged between the side wall of the water storage tank 17 and the channel-changing partition 5, and a drain valve 8 is arranged on the bottom of the board inlet 7.

The side wall of the water tank 15 is provided with a temperature controller 13, the temperature controller 13 is connected with the heating device 14, the side wall of the water tank 15 is provided with a liquid level gauge 12, and the size of the water tank 15 is 1m×1m×1m , The material is low carbon steel with high strength, high temperature resistance, long life and good corrosion resistance.

The size of the water injection pipeline 16 is: inner diameter 20mm, outer diameter 30mm, the material is low carbon steel for the inner ring, and aluminum-plastic pipe for the outer ring.

The outer wall of the model box 1 is fixedly connected with reinforcing ribs 3, the reinforcing ribs 3 are channel steel or angle steel, the size of the model box 1 is 1m×2m×2m, and the material is high in strength, high temperature resistance, long life, durable Low carbon steel with good corrosion resistance.

The permeable plate 4 is provided with a number of evenly distributed through holes. The material of the permeable plate 4 is low carbon steel with high strength, high temperature resistance, long life and good corrosion resistance, and its size is 1m×2m×0.01m.

The channel-changing partition 5 has through holes of several shapes, and the channel-changing partition 5 enters the middle of the top of the water storage tank 17 from the plate inlet 7 in the middle of the side wall of the water storage tank 17, and fits with the water baffle 6 to be airtight, and the channel-changing partition The size of the plate 5 is 0.7m×1m×0.01m, and the material of the variable channel partition plate 5 is low carbon steel.

The water baffle 6 is an impermeable board, and the water baffle 6 is divided into two pieces and fixed on both sides of the top of the water storage tank 17, and fits and seals with the channel-changing baffle 5, and its size is 0.65m×1m×0.01m. The material of water plate 6 is low carbon steel.

The pressurizing pump 11 is a piston pump or a screw pump.

The heating device 14 is electric heating.

A test method for a water inrush test device, comprising the following eight steps:

1. Assemble the model test system: fill the test material into the inside of the model box 1 according to the test requirements, and arrange the monitoring components 2 according to the test requirements;

Two, start the heating device 14, set the water temperature required for the test by the temperature controller 13;

3. Close the drain valve 8 at the bottom of the water storage tank 17, open the constant pressure valve 10 and set the required pressure for the test;

4. According to the test requirements, insert the deformation channel partition 5 into the top of the water storage tank through the plate inlet 7;

5. Turn on the booster pump 11, and the water in the water tank 15 will inject water into the water storage tank 17 and pressurize it through the water injection pipeline 16 through the constant pressure valve 10 and the water inlet hole 9;

6. After the water injection reaches the rated pressure, the pressurizing pump 11 automatically stops pressurizing, and observes the changes of mechanical parameters such as osmotic pressure, displacement, and deformation of the test material in the model box 1 under the condition of partial pressurization at the bottom;

7. Drainage after the test: When the test is over, open the drain valve 8 to drain the water in the water storage tank 17;

Eight, repeat test: set water temperature again by temperature controller 13, regulate pressure by constant pressure valve 10 and change variable channel dividing plate 5 and carry out combination repeat test again.

The parts of the present invention that are not described in detail are known technologies of those skilled in the art. Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. a kind of gushing water experimental rig, it includes water tank（15）And model casing（1）, it is characterised in that：The model casing（1）Bottom There is water tank in portion（17）, model casing（1）Outer wall be equipped with several monitoring elements（2）, the water tank（17）Top have change Channel partition（5）And partition plate（6）, variable conduit partition plate（5）And partition plate（6）The upper surface of be equipped with porous disc（4）, the water tank（15）With Water tank（17）Between pass through filling pipe（16）It is connected with force (forcing) pump（11）And constant pressure valve（10）, the force (forcing) pump（11）Go out Mouth pipeline is equipped with pressure gauge（10）, water tank（15）Bottom inside be equipped with heating unit（14）, the water tank（17）Side There are several inlet openings on wall（9）, water tank（17）Side wall and variable conduit partition plate（5）Between have into Ban Kou（7）, it is described into Ban Kou （7）Bottom on have drain valve（8）.

2. a kind of gushing water experimental rig according to claim 1, it is characterised in that：The water tank（15）Side wall be equipped with Temperature controller（13）, the temperature controller（13）With heating unit（14）Connection, water tank（15）Side wall be equipped with liquid level Meter（12）, water tank（15）Size for 1m × 1m × 1m, material is mild steel.

3. a kind of model casing for gushing water experimental rig according to claim 1, it is characterised in that：The filling pipe （16）Size be：Internal diameter 20mm, outer diameter 30mm, material are that inner ring is mild steel, and outer shroud is aluminium-plastic pipe.

4. a kind of model casing for gushing water experimental rig according to claim 1, it is characterised in that：The model casing （1）Outer wall on be fixedly connected with reinforcing rib（3）, the reinforcing rib（3）For channel steel or angle steel, model casing（1）Size be 1m × 2m × 2m, material are mild steel.

5. a kind of model casing for gushing water experimental rig according to claim 1, it is characterised in that：The porous disc （4）It is equipped with several equally distributed through holes, porous disc（4）Material for mild steel, size is 1m × 2m × 0.01m.

6. a kind of model casing for gushing water simulation test in porous intake chamber according to claim 1, it is characterised in that： The variable conduit partition plate（5）On have the through holes of several forms, variable conduit partition plate（5）From water tank（17）Among side wall into Ban Kou (7) water tank is entered（17）Crown center, with water-stop sheet（6）Agree with closed, variable conduit partition plate（5）Size for 0.7m × 1m × 0.01m, variable conduit partition plate（5）Material be mild steel.

7. a kind of model casing for gushing water simulation test in porous intake chamber according to claim 1, it is characterised in that： The water-stop sheet（6）For waterproof plate, water-stop sheet（6）It is divided into two pieces and is fixed on water tank（17）The both sides at top, with variable conduit Partition plate（5）Agree with it is closed, size be 0.65m × 1m × 0.01m, water-stop sheet（6）Material be mild steel.

8. a kind of gushing water experimental rig according to claim 1, it is characterised in that：The force (forcing) pump（11）For piston pump or Screw pump.

9. a kind of gushing water experimental rig according to claim 1, it is characterised in that：The heating unit（14）Add for electricity Heat.

10. a kind of test method of gushing water experimental rig according to claim 1, it is characterised in that：Test method includes Eight step below：

Assembly model test system：Test material is inserted by model casing according to test requirements document（1）Inside, according to test requirements document cloth If monitoring element（2）；

Start heating unit（14）, pass through temperature controller（13）Required water temperature is tested in setting；

Close water tank（17）Bottom discharge valve（8）, open constant pressure valve（10）And set pressure needed for experiment；

According to experiment needs, channel partition will be deformed（5）By into Ban Kou（7）It is inserted into water tank top；

Open force (forcing) pump（11）, water tank（15）Waterfront economy waterpipe（16）Pass through constant pressure valve（10）, inlet opening（9）To water tank (17) water filling is pressurizeed；

Water filling reaches force (forcing) pump after rated pressure（11）It is automatically stopped pressurization, observing and nursing case（1）Interior test material is in bottom office Portion pressurization under conditions of, osmotic pressure, displacement, deformation etc. mechanics parameters variation；

Draining after the test：When after the test, drain valve is opened（8）, can be by water tank（17）Interior water discharge；

It repeats to test：Again through temperature controller（13）Water temperature is set, passes through constant pressure valve（10）Adjust pressure and more transformation Channel partition（5）Repetition experiment is combined again.