Coal mine gas composite power disaster prediction simulation device

Abstract

The application discloses a coal mine gas composite power disaster prediction simulation device, which comprises a test bin, a simulation shell and a coal sample replacement assembly. The coal sample replacement assembly comprises a driving shaft, an outer cylinder, a coal storage bin, a hydraulic plate and a sealing plate three. The coal sample replacement assembly enables the simulation device to experiment on different types of coal samples, thereby studying the influence of the difference of the properties of the coal on the disaster occurrence. The replacement of the coal sample is more convenient and fast. The multiple injection pipes and extraction pipes can realize dynamic simulation of the gas concentration and predict the possibility and severity of the disaster occurrence under different mining conditions, thereby providing a scientific basis for the safety production of the coal mine. The hydraulic plate and the sealing plate three are arranged, so that the hydraulic plate can slide under the pressure of the gas in the simulation cavity, thereby enabling the sealing plate three to open, simulating a more real gas outburst phenomenon, and the simulated data is more accurate, and the predicted result is more accurate.

Description

Technical Field

[0001] This invention relates to the field of coal mine gas dynamic disaster prediction and simulation technology, specifically a coal mine gas composite dynamic disaster prediction and simulation device. Background Technology

[0002] The coal mine gas-related dynamic disaster prediction simulation device aims to predict and assess gas-related dynamic disasters by simulating the real environment underground in coal mines. This device can simulate various factors such as gas concentration, ground stress, and the physical and mechanical properties of coal to reveal the mechanisms and conditions under which disasters occur. Furthermore, it can conduct experiments using different types of coal samples to study the impact of differences in coal properties on disaster occurrence.

[0003] Most existing gas dynamic disaster simulation devices are integrated designs, which makes it cumbersome to handle different types of coal samples. Furthermore, when simulating gas outbursts, the sealed bottom plate of the device is often opened, allowing gas and coal inside the device to erupt. While this method can simulate gas outbursts under specific pressures, the sealing plate is actively opened, and the gas is passively released. In reality, a gas outburst occurs when, with increasing mining depth and gas content, a weak coal seam is breached by the gravitational force of gas release under ground stress, causing a sudden release of large amounts of gas and coal. In this case, the gas actively pushes open the weak coal seam, resulting in an outburst. Compared to reality, this method of simulating gas outbursts differs from actual outbursts, leading to reduced accuracy in the final test results.

[0004] Therefore, it is necessary to provide a coal mine gas combined dynamic disaster prediction and simulation device to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coal mine gas composite dynamic disaster prediction and simulation device, comprising a test chamber, a simulation shell, and a coal sample replacement component, wherein the simulation shell is fixedly installed in the test chamber, and the coal sample replacement component is rotatably installed in the test chamber;

[0006] The coal sample replacement assembly includes a drive shaft, an outer cylinder, a coal storage bin, and a sealing plate. The drive shaft is rotatably mounted on the simulation shell and passes through the test chamber, driven by a drive motor outside the test chamber. The outer cylinder is fixedly mounted on the drive shaft. Two coal storage bins are fixedly mounted on the outer cylinder at intervals, and two sealing plates are fixedly mounted between the two coal storage bins. The sealing plates and the outer cylinder rotate in a sealed manner along the simulation shell.

[0007] A simulation cavity is fixedly installed on the simulation shell, and the simulation cavity can be sealed and connected to the coal storage silo. Multiple extraction pipes are fixedly installed on the top and sides of the simulation cavity. An injection pipe is fixedly installed on the top ring of the simulation cavity, and control valves are installed on the multiple extraction pipes and injection pipes. A feeding trough is fixedly installed on the simulation shell. The feeding trough passes through the test chamber and is connected to the external feeding mechanism. A sealing plate is slidably installed in the feeding trough by a hydraulic rod.

[0008] Preferably, the bottom of the test chamber is sealed and slidably provided with two discharge troughs, and the two discharge troughs are respectively located below the simulation chamber and the feeding trough.

[0009] Preferably, a hydraulic chamber is symmetrically fixedly arranged on the side of the coal storage silo, and a communication port communicating with the coal storage silo is opened at the top of the hydraulic chamber. A hydraulic plate is slidably arranged in the hydraulic chamber, and an adjusting plate is also slidably arranged in the hydraulic chamber. Multiple springs are fixedly arranged between the adjusting plate and the hydraulic plate. A lead screw is driven to rotate on the hydraulic chamber by a drive motor. A nut that cooperates with the lead screw is fixedly arranged on the adjusting plate.

[0010] Preferably, a sealing plate three is provided at the bottom of the hydraulic plate by limiting rotation via a hydraulic rod two, a conical discharge port is provided at the bottom of the coal storage bin, the sealing plate three can seal the conical discharge port, and a plurality of toothed blocks are fixedly provided at intervals at the output end of the sealing plate three, and a V-shaped protrusion is fixedly provided on the toothed blocks;

[0011] Furthermore, the multiple teeth on the two sealing plates can be sealed and engaged.

[0012] Preferably, the side of the coal storage bunker is provided with multiple injection and extraction holes, and multiple sleeves are fixedly installed on the outer cylinder. The injection and extraction holes pass through the outer cylinder and communicate with the sleeves.

[0013] Two sealing plates are symmetrically slidably mounted on the injection port via spring 2, and a guide rod is fixedly mounted on the sealing plate 4.

[0014] Preferably, the simulated outer shell has multiple sliding grooves 1 for sliding the sleeve and multiple sliding grooves 2 for sliding the guide rod, and the sleeve slides along the sliding groove 1 in a sealed manner and can be in sealed communication with the extraction tube.

[0015] An arc-shaped guide block is fixedly installed in the second slide groove. The arc-shaped guide block can push the guide rod and drive the sealing plate four to slide.

[0016] Preferably, it also includes a data acquisition and analysis system, which includes multiple gas concentration detection sensors embedded in the simulation chamber and the test chamber for detecting gas concentration, and multiple pressure sensors embedded in the simulation chamber for detecting gas pressure changes and internal pressure changes of the simulation chamber. The data acquisition and analysis system provides the ability to process and analyze data to reveal the laws and mechanisms of gas dynamic disasters. A gas emission pipe is fixedly installed on the test chamber.

[0017] Compared with the prior art, the present invention provides a coal mine gas combined dynamic disaster prediction and simulation device, which has the following beneficial effects:

[0018] In this invention, a coal sample replacement component enables the simulation device to conduct experiments on different types of coal samples, thereby studying the impact of differences in coal properties on the occurrence of disasters. The coal sample replacement component also makes sample replacement more convenient and faster. Multiple injection and extraction pipes installed on the simulation chamber enable dynamic simulation of gas concentration and prediction of the probability and severity of disasters under different mining conditions, providing a scientific basis for safe coal mine production. Furthermore, a hydraulic plate is slidably installed on the coal storage bin, and a sealing plate three is installed on the hydraulic plate. This allows the hydraulic plate to slide under the pressure of gas in the simulation chamber, thereby opening the sealing plate three to simulate a gas outburst. The simulated data is more accurate, and the different pressure-bearing capacities of different coal samples can be simulated through the adjustment plate and spring one, further simulating a more realistic gas outburst phenomenon and making the prediction results more accurate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure in this invention;

[0021] Figure 3 for Figure 1 Enlarged schematic diagram of section A in the middle;

[0022] Figure 4 This is a schematic diagram of the coal sample replacement assembly in this invention;

[0023] Figure 5 This is a schematic diagram of the coal storage bunker in this invention;

[0024] Figure 6 for Figure 5 Enlarged schematic diagram of section B in the middle;

[0025] In the diagram: 1. Test chamber; 11. Discharge chute; 2. Simulation shell; 21. Simulation cavity; 212. Extraction pipe; 212. Injection pipe; 22. Feeding chute; 23. Slide 1; 24. Slide 2; 241. Arc-shaped guide block; 3. Coal sample replacement assembly; 31. Drive shaft; 32. Outer cylinder; 321. Casing; 322. Sealing plate 4; 323. Guide rod; 33. Coal storage bin; 331. Hydraulic cavity; 332. Hydraulic plate; 333. Adjusting plate; 334. Hydraulic rod 2; 335. Sealing plate 3; 336. Tooth block; 337. Injection / extraction hole; 34. Sealing plate 1. Detailed Implementation

[0026] Please see Figures 1-6 In this embodiment of the invention, a coal mine gas combined dynamic disaster prediction simulation device includes a test chamber 1, a simulation shell 2, and a coal sample replacement component 3, wherein the simulation shell 2 is fixedly installed in the test chamber 1, and the coal sample replacement component 3 is rotatably installed in the test chamber 1.

[0027] The coal sample replacement assembly 3 includes a drive shaft 31, an outer cylinder 32, a coal storage bin 33, and a sealing plate 34. The drive shaft 31 is rotatably mounted on the simulation shell 2 and passes through the test chamber 1, driven by a drive motor outside the test chamber 1. The outer cylinder 32 is fixedly mounted on the drive shaft 31. Two coal storage bins 33 are fixedly mounted on the outer cylinder 32 at intervals, and two sealing plates 34 are fixedly mounted between the two coal storage bins 33. The sealing plates 34 and the outer cylinder 32 rotate in a sealed manner along the simulation shell 2.

[0028] A simulation cavity 21 is fixedly installed on the simulation shell 2. The simulation cavity 21 can be sealed and connected to the coal storage silo 33. Multiple extraction pipes 211 are fixedly installed on the top and sides of the simulation cavity 21. An injection pipe 212 is fixedly installed around the top of the simulation cavity 21. Control valves are installed on the multiple extraction pipes 211 and injection pipes 212. A feeding trough 22 is fixedly installed on the simulation shell 2. The feeding trough 22 passes through the test chamber 1 and is connected to the external feeding mechanism. A sealing plate 2 is slidably installed in the feeding trough 22 by a hydraulic rod.

[0029] During the rotation of the outer cylinder 32 along the simulated outer shell 2, the sealing plate 34 always slides in a sealed manner with the simulated outer shell 2, so that when the coal storage hopper 33 rotates out of the simulated cavity 21, the simulated cavity 21 can still maintain a sealed state, thereby preventing gas leakage in the simulated cavity 21.

[0030] The bottom of the test chamber 1 is sealed and slidably equipped with two discharge troughs 11, and the two discharge troughs 11 are respectively located below the simulation chamber 21 and the feeding trough 22;

[0031] Hydraulic chambers 331 are symmetrically fixedly arranged on the side of the coal storage silo 33. The top of the hydraulic chamber 331 has a communication port that communicates with the coal storage silo 33. A hydraulic plate 332 is slidably arranged in the hydraulic chamber 331. An adjusting plate 333 is also slidably arranged in the hydraulic chamber 331. Multiple springs are fixedly arranged between the adjusting plate 333 and the hydraulic plate 332. A lead screw is driven to rotate on the hydraulic chamber 331 by a drive motor. A nut that cooperates with the lead screw is fixedly arranged on the adjusting plate 333.

[0032] The bottom of the hydraulic plate 332 is provided with a sealing plate 335 that is limited and rotated by the hydraulic rod 334. The bottom of the coal storage bin 33 is provided with a conical discharge port. The sealing plate 335 can seal the conical discharge port. The output end of the sealing plate 335 is provided with a plurality of toothed blocks 336 at intervals. The toothed blocks 336 are provided with V-shaped protrusions.

[0033] In particular, the V-shaped protrusions on the tooth block 336 enable the coal sample to be pushed away when the sealing plate 335 slides, preventing the coal sample from getting stuck between the two sealing plates 335 and avoiding the situation where the simulation cavity 21 cannot be sealed.

[0034] Furthermore, the multiple teeth 336 on the two sealing plates 335 can be sealed and engaged;

[0035] The side of the coal storage bunker 33 is provided with a plurality of injection and extraction holes 337, and a plurality of sleeves 321 are fixedly provided on the outer cylinder 32. The injection and extraction holes 337 pass through the outer cylinder 32 and are connected to the sleeves 321.

[0036] Two sealing plates 322 are symmetrically slidably arranged on the injection hole 337 via spring 2, and a guide rod 323 is fixedly arranged on the sealing plate 322;

[0037] The simulated outer shell 2 is provided with multiple sliding grooves 23 for the sleeve 321 to slide and multiple sliding grooves 24 for the guide rod 323 to slide. The sleeve 321 slides along the sliding grooves 23 in a sealed manner and can be sealed and connected with the extraction tube 211.

[0038] An arc-shaped guide block 241 is fixedly installed in the second slide groove 24. The arc-shaped guide block 241 can push the guide rod 323 and drive the sealing plate 322 to slide. That is to say, the sealing plate 322 will only open when the injection hole 337 is connected to the extraction pipe 211, and will be closed at other times.

[0039] During implementation, different coal samples are added to the two coal storage bins 33 respectively through the feeding mechanism and the feeding trough 22. Then, the outer cylinder 32 is rotated by the drive shaft 31, so that the coal storage bins 33 are sealed and connected to the simulation cavity 21. During this process, the sleeve 321 can be sealed and connected to the extraction pipe 211, and the guide rod 323 can slide under the action of the arc-shaped guide block 241 and drive the sealing plate 322 to slide, so that the injection hole 337 is connected to the extraction pipe 211. Then, multiple extraction pipes 211 are used to make the injection hole 337 connected to the extraction pipe 211. 11 and injection pipe 212 inject or extract gas into the simulation chamber to achieve dynamic simulation of gas concentration and predict the probability and severity of disasters under different mining conditions. Subsequently, gas extraction is stopped while gas is continuously injected into the simulation chamber, causing the pressure inside the simulation chamber 21 to continuously increase. When the pressure inside the simulation chamber 21 exceeds the supporting force of the spring, the hydraulic plate 332 slides under force, causing the sealing plate 335 to open and coal and gas to spray out from the conical discharge port, thus simulating a gas outburst. During the process, the distance between the adjusting plate 333 and the hydraulic plate 332 can be adjusted by the screw, thereby changing the support strength of the spring. That is, the pressure strength of the hydraulic plate 332 can be adjusted according to different coal sample types, thus simulating a more realistic gas outburst situation, further improving the accuracy of the prediction results, and providing a scientific basis for coal mine safety production. After one simulation is completed, the coal sample replacement component 3 is rotated so that another coal storage bin 33 containing different coal samples is connected to the simulation chamber 21 for the next simulation. After the simulation is completed, the coal storage bin 33 is rotated to the bottom of the feeding trough 22. Then, the sealing plate 335 is driven to rotate by the hydraulic rod 334, so that the coal sample in the coal storage bin 33 is discharged into the discharge trough 11 through the conical discharge port. Then, the sealing plate 335 is closed and new coal samples of different types are added to the coal storage bin 33 through the feeding trough 22 and the feeding mechanism. This cycle is repeated to simulate the dynamic disaster of different types of coal samples, thereby studying the impact of the difference in coal properties on the occurrence of disasters and further improving the accuracy of the prediction results.

[0040] In this embodiment, a data acquisition and analysis system is also included. The data acquisition and analysis system includes multiple gas concentration detection sensors embedded in the simulation cavity 21 and the test chamber 1 for detecting gas concentration, and multiple pressure sensors embedded in the simulation cavity 21 for detecting gas pressure changes and internal pressure changes in the simulation cavity. The data acquisition and analysis system provides data processing and analysis to reveal the laws and mechanisms of gas dynamic disasters. A gas emission pipe is fixedly installed on the test chamber 1.

[0041] In particular, the gas emission pipe installed on the test chamber 1 can further discharge the gas in the test chamber 1, thereby preventing gas leakage during the replacement of coal samples and ensuring the personal safety of the staff.

[0042] In summary, when implemented, this invention enables the simulation device to conduct experiments on different types of coal samples by setting up a coal sample replacement component 3, thereby studying the impact of differences in coal properties on the occurrence of disasters. The coal sample replacement component 3 also makes coal sample replacement more convenient and faster. Multiple injection pipes 212 and extraction pipes 211 set on the simulation chamber 21 enable dynamic simulation of gas concentration and prediction of the probability and severity of disasters under different mining conditions, providing a scientific basis for safe coal mine production. Furthermore, a hydraulic plate 332 is slidably installed on the coal storage bin 33, and a sealing plate 335 is installed on the hydraulic plate 332. This allows the hydraulic plate 332 to slide under the pressure of gas in the simulation chamber, thereby opening the sealing plate 335 to simulate a gas outburst. The simulated data is more accurate, and the pressure-bearing capacity of different coal samples can be simulated through the adjustment plate 333 and the spring, further simulating a more realistic gas outburst phenomenon and making the prediction results more accurate.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coal mine gas combined dynamic disaster prediction and simulation device, characterized in that: It includes a test chamber (1), a simulation shell (2) and a coal sample replacement assembly (3), wherein the simulation shell (2) is fixedly installed in the test chamber (1) and the coal sample replacement assembly (3) is rotatably installed in the test chamber (1). The coal sample replacement assembly (3) includes a drive shaft (31), an outer cylinder (32), a coal storage bin (33), and a sealing plate (34). The drive shaft (31) is rotatably mounted on the simulation shell (2) and passes through the test chamber (1) and is driven by a drive motor outside the test chamber (1). The outer cylinder (32) is fixedly mounted on the drive shaft (31). Two coal storage bins (33) are fixedly mounted on the outer cylinder (32) at intervals, and two sealing plates (34) are fixedly mounted between the two coal storage bins (33). The sealing plate (34) and the outer cylinder (32) rotate in a sealed manner along the simulation shell (2). A simulation cavity (21) is fixedly provided on the simulation shell (2). The simulation cavity (21) can be sealed and connected with the coal storage silo (33). Multiple extraction pipes (211) are fixedly provided on the top and sides of the simulation cavity (21). An injection pipe (212) is fixedly provided on the top ring of the simulation cavity (21). Control valves are provided on the multiple extraction pipes (211) and injection pipes (212). A feeding trough (22) is fixedly provided on the simulation shell (2). The feeding trough (22) passes through the test chamber (1) and is connected to the external feeding mechanism. A sealing plate is slidably provided in the feeding trough (22) through a hydraulic rod. Hydraulic chambers (331) are symmetrically fixed on the side of the coal storage silo (33). A communication port communicating with the coal storage silo (33) is opened at the top of the hydraulic chamber (331). A hydraulic plate (332) is slidably disposed in the hydraulic chamber (331). An adjusting plate (333) is also slidably disposed in the hydraulic chamber (331). A plurality of springs are fixedly disposed between the adjusting plate (333) and the hydraulic plate (332). A lead screw is driven to rotate on the hydraulic chamber (331) by a drive motor. A nut that cooperates with the lead screw is fixedly disposed on the adjusting plate (333). The bottom of the hydraulic plate (332) is provided with a sealing plate (335) which is limited and rotated by the hydraulic rod (334). The bottom of the coal storage bin (33) is provided with a conical discharge port. The sealing plate (335) can seal the conical discharge port. The output end of the sealing plate (335) is provided with a plurality of toothed blocks (336) at intervals. The toothed blocks (336) are provided with V-shaped protrusions. Furthermore, the multiple teeth (336) on the two sealing plates (335) can seal and engage.

2. The coal mine gas combined dynamic disaster prediction and simulation device according to claim 1, characterized in that: The test chamber (1) has two discharge troughs (11) with a sealed sliding arrangement at the bottom, and the two discharge troughs (11) are located below the simulation chamber (21) and the feeding trough (22), respectively.

3. The coal mine gas combined dynamic disaster prediction and simulation device according to claim 1, characterized in that: The coal storage bunker (33) has multiple injection and extraction holes (337) on its side, and multiple sleeves (321) are fixedly installed on the outer cylinder (32). The injection and extraction holes (337) pass through the outer cylinder (32) and are connected to the sleeves (321). Two sealing plates (322) are symmetrically slidably arranged on the injection hole (337) by means of two springs, and a guide rod (323) is fixedly arranged on the sealing plate (322).

4. The coal mine gas combined dynamic disaster prediction and simulation device according to claim 3, characterized in that: The simulated outer shell (2) is provided with a plurality of sliding grooves (23) for the sleeve (321) to slide and a plurality of sliding grooves (24) for the guide rod (323) to slide, and the sleeve (321) slides along the sliding groove (23) in a sealed manner and can be sealed and connected with the extraction tube (211). An arc-shaped guide block (241) is fixedly installed in the second slide groove (24). The arc-shaped guide block (241) can push the guide rod (323) and drive the fourth sealing plate (322) to slide.

5. The coal mine gas combined dynamic disaster prediction and simulation device according to claim 1, characterized in that: It also includes a data acquisition and analysis system, which includes multiple gas concentration detection sensors embedded in the simulation chamber (21) and the test chamber (1) for detecting gas concentration, and multiple pressure sensors embedded in the simulation chamber (21) for detecting gas pressure changes and internal pressure changes of the simulation chamber. The data acquisition and analysis system provides the ability to process and analyze data to reveal the laws and mechanisms of gas dynamic disasters. A gas emission pipe is fixedly installed on the test chamber (1).

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