Coal and gas outburst catastrophe scene fidelity simulation system and method

Abstract

The invention discloses a coal and gas outburst catastrophe scene fidelity simulation system and method.The system comprises an outburst induction module, a fluid filling module and a multifunctional monitoring module, and the fluid filling module comprises a water filling module, a slurry filling module, a gas drainage module and a Marithan filling module; the water filling module is used for slotting, fracturing and permeability increasing of a large-size coal body in a fracture development area, the slurry filling module is used for conducting bottom plate drilling and high-pressure-resistant hole sealing, the Marithan filling module is used for filling and reinforcing the coal body behind the fracture development area, and the gas drainage module is used for further conducting gas extraction, pressure relief and permeability increasing on the fracture development area and filling of high-pressure gas for outburst energizing. The multifunctional monitoring module provides a judgment basis by monitoring the drilling air pressure, the crack development condition and the coal body deformation fluid filling degree; the outburst induction module remotely induces the coal body on the tunneling face to be broken, and then the coal body outburst in the large-area fracture development area is caused, and the method has the advantages of being high in safety and reliability, high in authenticity and the like.

Description

Technical fields:

[0001] This invention relates to coal and gas outburst simulation technology, and in particular to a system and method for realistically simulating coal and gas outburst disaster scenarios. Technical background:

[0002] Coal and gas outbursts are among the most destructive dynamic disasters in underground coal mines. They are sudden, highly destructive, and can instantly destroy roadways, bury equipment, cause casualties, and seriously threaten safe production in coal mines. In the event of a disaster, the ability to quickly and safely evacuate the affected area and effectively carry out rescue and relief work can significantly reduce casualties and property losses. Therefore, efficient emergency rescue strategies are of paramount importance.

[0003] Emergency rescue drills are an important measure to improve on-site emergency rescue capabilities. However, existing coal and gas outburst emergency rescue drills cannot simulate the actual coal and gas outburst environment in coal mines. Most of them only stay at the level of communication between higher and lower levels, resulting in insufficient practical experience for production and rescue personnel in the face of disasters. In addition, the lack of disaster-causing factors at the rescue site makes it impossible to effectively demonstrate the application and improvement of rescue equipment.

[0004] There are many existing ground-based experimental devices for simulating coal and gas outbursts, but due to limitations in laboratory space and the difficulty in sampling large quantities of raw coal, these devices generally suffer from limitations in size and simplification of scenarios. They are mostly used only for experimental research on the process and mechanism of coal and gas outbursts (CN202211668415.7; CN202110665506.4; CN201910282365.0), and cannot provide a field simulation environment for emergency rescue and disaster relief drills.

[0005] Based on this, the present invention provides a system and method for simulating coal and gas outburst disaster scenarios. Based on the principle of gas simulation similarity and the spherical shell model of coal and gas outburst, the dynamic process of coal and gas outburst at the tunneling face can be realized in situ underground through steps such as filling the coal body with high-pressure CO2 gas and artificially inducing outburst. This system and method can accurately simulate coal and gas outburst disaster scenarios, improve the scientificity and realism of emergency rescue drills for coal and gas outbursts in my country, and has important practical significance. Summary of the Invention:

[0006] The purpose of this invention is to provide a realistic simulation system and method for coal and gas outburst disaster scenarios. By setting up a realistic simulation system for coal and gas outburst disaster scenarios through the method, coal outbursts in a certain area are artificially induced according to fixed steps. This can simulate the dynamic process of coal and gas outbursts and realistic disaster scenarios. CO2 gas is used instead of gas, which has high safety and reliability.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a coal and gas outburst disaster scenario simulation system, including an outburst induction module, a fluid injection module, and a multi-functional monitoring module.

[0008] The protruding induction module includes a remote detonator, an explosive safety fuse, and mining explosive connected to the end of the fuse.

[0009] The fluid injection module includes a water injection module, a slurry injection module, a gas extraction module, and a malathion injection module. The water injection module includes a solenoid valve I connected to a downhole water pipe at one end via a water delivery pipe. The other end of the solenoid valve I is connected to the inlet of a water plunger pump. The outlet of the water plunger pump is connected to a gas-liquid mixing delivery pipe equipped with a pressure gauge I, a flow meter, and a thermometer. The gas-liquid mixing delivery pipe is connected to high-pressure water branch pipes via a rapid diversion connector system I. Each high-pressure water branch pipe connected to the rapid diversion connector system I extends into the bottom of boreholes B1, B2…BX and is connected to a guide nozzle at the end. The slurry injection module includes a slurry delivery main pipe connected to a slurry storage tank. The slurry delivery main pipe is sequentially equipped with a slurry delivery solenoid valve II, a slurry plunger pump, a pressure gauge II, and a rapid diversion connector system II at the end. Each high-pressure water branch pipe connected to the rapid diversion connector system II extends into the bottom of boreholes B1, B2…BX and is connected to a guide nozzle at the end. High-pressure slurry diversion branch pipes extend into boreholes A, B1, B2...BX, and C respectively, and are each connected to a high-pressure mine sealing device placed in the borehole; the gas extraction module includes a solenoid valve III connected to a CO2 storage tank via a CO2 delivery pipe, the other end of which is connected to a solenoid valve IV and the inlet of the gas extraction pump via a double-port, the gas-liquid mixing delivery pipe is connected to the other end of solenoid valve IV and a solenoid valve V via a double-port, the other end of which is connected to the outlet of the gas extraction pump and a solenoid valve VI via a double-port, and the other end of solenoid valve VI is connected to the underground gas extraction pipeline; the Marisan injection module includes a Marisan plunger pump, the inlet of which is connected to a Marisan storage tank via a solenoid valve VII, the outlet of which is connected to a Marisan injection pipe equipped with a pressure gauge III, and the Marisan injection pipe extends into the bottom of borehole C and is connected to a Marisan nozzle.

[0010] The multi-functional monitoring module includes a terminal display, and multi-functional monitoring sensors I and II located at the bottom of boreholes A and C respectively and connected to the terminal display via data transmission cables.

[0011] Furthermore, the mining explosive is arranged in three rows of holes. The first and second rows of holes are parallel to the top and bottom surfaces of the coal seam, and the third row of holes is tilted downwards at a 15° angle. The first, second, and third rows of holes are at a 60° angle to the horizontal surface of the tunneling face. The horizontal distance between the end of the explosive drill hole and the end of borehole A is 1.5-3m.

[0012] Furthermore, the high-pressure mine sealing device includes an upper sealing belt, a lower sealing belt, a grout return pipe, and a rupture valve connected to the upper and lower sealing belts via a grouting pipe. Fixed probes are installed on the lower half of the upper sealing belt and the upper half of the lower sealing belt. The upper and lower sealing belts of the high-pressure mine sealing device are located in the bottom plate drilling area, and the rupture valve withstands a critical pressure of 4 MPa.

[0013] Furthermore, the guide nozzle of the present invention includes a guide, a guide shaft and a nozzle, wherein the guide shaft can control the rotation range of the guide to be 0-360°.

[0014] Furthermore, the multifunctional monitoring sensors I and II are attached to the borehole wall near the B borehole side, and can monitor coal body strain, internal fracture development characteristics, and cavity pressure; the terminal display can display the monitoring data of the multifunctional monitoring sensors I and II in real time.

[0015] This invention also provides a method for realistically simulating coal and gas outburst disaster scenarios, comprising the following steps:

[0016] a. Zone division: The coal mine tunneling face is divided into four zones along the tunneling direction: outburst induction zone I, fracture development zone II, fracture filling zone III, and original stress zone IV. The boundary between outburst induction zone I and fracture development zone II is 3-5m away from the tunneling face. The distance between the coal boundary between fracture development zone II and fracture filling zone III and the tunneling face is L, where L ranges from 8-15m.

[0017] b. Bottom plate drilling: Drilling is carried out along the bottom drainage roadway of the coal seam to form boreholes A, B1, B2...BX, C. The end of borehole A is located in the central area of ​​the boundary between the outburst induction zone I and the fracture development zone II; the ends of boreholes B1, B2...BX are located within the fracture development zone II; the end of borehole B1 is located at the boundary between the fracture development zone II and the fracture filling zone III. The number X of type B boreholes is the smallest integer not less than L / (Z·cosθ). The vertical spacing of the boreholes is Z, where the size of Z is the same as the radius of influence of hydraulic slotting boreholes, m, and θ is the angle between boreholes B1, B2...BX and the tunneling face; the end of borehole C is located in the fracture filling zone III.

[0018] c. Permeability Enhancement through Perforation: First, deploy the water injection module in the fluid injection module, turn on the water plunger pump and solenoid valve I, use the water plunger pump to pressurize the mine water to 30-50MPa, turn on the rapid diversion port system, use the guide nozzles located in the B1, B2...BX boreholes to perform hydraulic cavity creation and form cavities D1, D2...DX. The guide nozzles change the rotation angle in the cavities D1, D2...DX to perform full-area hydraulic permeation enhancement in the fracture development zone II. The residual water flow and coal dust are discharged through the B1, B2...BX boreholes.

[0019] d. Pressure Relief and Permeability Enhancement: Deploy a multi-functional monitoring module; deploy a gas extraction module, removing the high-pressure water diversion branch pipe and guide nozzle from boreholes B2…BX, retaining the guide nozzle and high-pressure water diversion branch pipe in borehole B1 and connecting them separately to the gas-liquid mixing delivery pipe, which is then connected to the gas extraction module; deploy a malathion injection module; deploy a slurry injection module, opening solenoid valve II and the slurry plunger pump, pressurizing the slurry to 4-10 MPa using the slurry plunger pump, and opening the rapid diversion port system II to inject the slurry at a fixed rate. The high-pressure mine sealing devices located in boreholes A, B1, B2...BX, and C are used to fill the rock fissures in the bottom borehole area with slurry. After the slurry returns from the return pipe, the slurry plunger pump and the rapid diversion port system II are turned off to stop the slurry injection. After the slurry cools, the gas extraction pump, solenoid valve IV, and solenoid valve VI are turned on to extract coal seam gas for pressure relief and permeability enhancement. When the multi-functional monitoring sensor I detects that the gas pressure in borehole A has decreased to 3% of the original value, the extraction is stopped, and the gas extraction pump, solenoid valve IV, and solenoid valve VI are turned off.

[0020] e. Reinforcement of fracture-filled zone III: After depressurization and permeability enhancement, turn on the Marisan plunger pump and solenoid valve VII. Use the Marisan plunger pump to pressurize the Marisan to 4MPa and inject it into borehole C at a fixed rate to reinforce fracture-filled zone III. Multifunctional monitoring sensor II monitors the deformation of the coal body. If the deformation rate is less than 0.1% within 10 minutes, stop the injection.

[0021] f. Gas filling: Turn on and control the gas extraction pump, solenoid valve III and solenoid valve V to control the CO2 state in the injection pipeline to be maintained at 3-5 MPa, the same as the coal body temperature and gaseous state. Fill the fracture development zone II with CO2 gas at a fixed rate. Multifunctional monitoring sensors I and II monitor the gas pressure at boreholes A and C. When the gas pressure at borehole A is 3 MPa and the gas pressure change at borehole C is less than 20%, stop the gas filling and turn off the gas extraction pump, solenoid valve III and solenoid valve V.

[0022] g. Outburst Induction: Deploy outburst induction modules to break up coal in the outburst induction zone I via remote detonators, inducing outbursts in the fractured coal in zone II.

[0023] Furthermore, in the slurry injection module, the high-pressure mine sealing device and the pipelines and lines existing in the borehole are all kept in a sealed connection, and the connection can withstand a high pressure of 20MPa. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 A schematic diagram of the system layout for the C-type punching anti-reflective process;

[0026] Figure 2 Schematic diagram of the system layout for the pressure relief and permeability enhancement process (d) to the outburst induction process (g);

[0027] Figure 3 Schematic diagram of the layout of mining explosives;

[0028] Figure 4 Schematic diagram of a high-pressure mine sealing device

[0029] Figure 5 Schematic diagram of the guide nozzle structure

[0030] In the diagram, 0-1-Tunneling face; 0-2-Coal seam roof; 0-3-Coal wall; 1-1-Remote detonator; 1-2-Safety fuse for explosives; 1-3-Mining explosives; 2-1-Underground water pipe; 2-2-Water delivery pipe; 2-3-Solenoid valve I; 2-4-Water plunger pump; 2-5-Pressure gauge I; 2-6-Flow meter; 2-7-Thermometer; 2-8-Gas-liquid mixing delivery pipe; 2-9-Rapid diversion connector system I; 2-10-Guide nozzle; 2-11-Slurry storage tank; 2-12-Solenoid valve II; 2-13-Slurry plunger pump; 2-14-Slurry delivery main pipe; 2-15-Pressure gauge II; 2-16-Rapid diversion connector system II; 2-17-High-pressure resistant mining sealing device; 2-1 8-CO2 storage tank; 2-19-CO2 delivery pipe; 2-20-Solenoid valve III; 2-21-Solenoid valve IV; 2-22-Gas extraction pump; 2-23-Solenoid valve V; 2-24-Solenoid valve VI; 2-25-Downhole gas extraction pipeline; 2-26-Marisan storage tank; 2-27-Solenoid valve VII; 2-28-Marisan plunger pump; 2-29-Marisan injection pipe; 2-30-Pressure gauge III; 2-31-Marisan nozzle; 3-1-Multi-functional monitoring sensor I; 3-2-Terminal display; 3-3-Data transmission cable; 3-4-Multi-functional monitoring sensor II; I-Protrusion induction zone; II-Fractured development zone; III-Fractured filling zone; IV-Original stress zone. Detailed Implementation

[0031] As attached Figure 1 and 2As shown, the present invention provides a realistic simulation system for coal and gas outburst disaster scenarios, including an outburst induction module (1), a fluid injection module (2), and a multi-functional monitoring module (3); the outburst induction module (1) includes a remote detonator (1-1), an explosive safety fuse (1-2), and a mining explosive (1-3) connected to the end of the fuse; the fluid injection module (2) includes a water injection module (2a), a slurry injection module (2b), a gas extraction module (2c), and a malathion injection module (2d); the water injection module (2a) includes a solenoid valve I (2-3) connected to a downhole water pipe (2-1) through one end of a water delivery pipe (2-2), and the other end of the solenoid valve I (2-3) connected to a water plunger pump (2-4). The inlet of the slurry pump is connected to a gas-liquid mixing delivery pipe (2-8) equipped with a pressure gauge I (2-5), a flow meter (2-6), and a thermometer (2-7). The gas-liquid mixing delivery pipe (2-8) is connected to a high-pressure water diversion branch pipe via a quick-diffusion connector system I (2-9). Each high-pressure water diversion branch pipe connected to the quick-diffusion connector system I (2-9) extends into the bottom of boreholes B1, B2...BX and is connected to a guide nozzle (2-10) at the end. The slurry injection module (2b) includes a slurry delivery main pipe (2-14) connected to the slurry storage tank (2-11). The slurry delivery main pipe (2-14) is sequentially equipped with a slurry delivery solenoid valve II (2-12), a slurry plunger pump (2-13), a pressure gauge I (2-5), a flow meter (2-6), and a thermometer (2-7). Table II (2-15) and the end-of-line rapid diversion connector system II (2-16), each high-pressure slurry diversion branch pipe connected to the rapid diversion connector system II (2-16) extends into boreholes A, B1, B2...BX, C respectively and is connected to a high-pressure resistant mining sealing device (2-17) placed in the borehole; the gas extraction module (2c) includes a solenoid valve III (2-20) connected to a CO2 storage tank (2-18) via a CO2 delivery pipe (2-19), the other end of solenoid valve III (2-20) being connected to a solenoid valve IV (2-21) and the inlet of the gas extraction pump (2-22) via a double-port, and a gas-liquid mixing delivery pipe (2-8) being connected to a solenoid valve IV (2-21) via a double-port. The other end is connected to solenoid valve V (2-23). ​​The other end of solenoid valve V (2-23) is connected to the outlet of gas extraction pump (2-22) and solenoid valve VI (2-24) respectively through a double-port. The other end of solenoid valve VI (2-24) is connected to the downhole gas extraction pipeline (2-25). The Marisan injection module (2d) includes a Marisan plunger pump (2-28). The inlet of the Marisan plunger pump (2-28) is connected to the Marisan storage tank (2-26) through solenoid valve VII (2-27). The outlet of the Marisan plunger pump (2-28) is connected to a Marisan injection pipe (2-29) equipped with pressure gauge III (2-30). The Marisan injection pipe (2-29) extends into the bottom of borehole C and is connected to the Marisan nozzle (2-31).The multi-functional monitoring module (3) includes a terminal display (3-2), and multi-functional monitoring sensors I (3-1) and II (3-4) located at the bottom of boreholes A and C respectively and connected to the terminal display (3-2) via a data transmission cable (3-3).

[0032] As attached Figure 3 As shown, in this embodiment, the mining explosives (1-3) are arranged in three rows of holes. The first and second rows of holes are parallel to the top and bottom surfaces of the coal seam, and the third row of holes is tilted downwards at a 15° angle. The first, second, and third rows of holes are at a 60° angle to the horizontal of the tunneling face. The horizontal distance between the end of the explosive drill hole and the end of borehole A is 2m.

[0033] As attached Figure 4 As shown, in this embodiment, the high-pressure mine sealing device (2-17) includes an upper sealing belt (2-17a), a lower sealing belt (2-17c), a grout return pipe (2-17d), and a rupture valve (2-17b) connected to the upper and lower sealing belts via a grouting pipe. Fixed probes (2-17e) are installed on the lower half of the upper sealing belt (2-17a) and the upper half of the lower sealing belt (2-17c). The upper sealing belt (2-17a) and the lower sealing belt (2-17c) of the high-pressure mine sealing device (2-17) are located in the bottom plate drilling area. The rupture valve (2-17b) withstands a critical pressure of 4 MPa.

[0034] As attached Figure 5 As shown, in this embodiment, the guide nozzle (2-10) includes a guide (2-10a), a guide shaft (2-10b), and a nozzle (2-10c). The guide shaft can control the rotation range of the guide to 0-360°.

[0035] In this embodiment, the multifunctional monitoring sensors I (3-1) and II (3-4) are attached to the borehole wall near the B borehole and can monitor coal body strain, internal fracture development characteristics and cavity pressure; the terminal display (3-2) can display the monitoring data of multifunctional monitoring sensors I (3-1) and II (3-4) in real time.

[0036] As attached Figure 1-4 As shown, the present invention provides a method for realistically simulating coal and gas outburst disaster scenarios, comprising the following steps:

[0037] a. Regional division: as shown in the appendix Figure 1As shown in this embodiment, the coal mine tunneling face is divided into four regions along the tunneling direction: outburst induction zone I, fracture development zone II, fracture filling zone III, and original stress zone IV. The boundary between outburst induction zone I and fracture development zone II is 3-5m away from the tunneling face. The distance between the coal boundary between fracture development zone II and fracture filling zone III and the tunneling face is L, where L is 10m.

[0038] b. Drilling holes in the base plate: as shown in the attached document. Figure 1 As shown, in this embodiment, boreholes A, B1, B2...BX, and C are formed by drilling along the bottom drainage roadway of the coal seam. The end of borehole A is located in the central area of ​​the boundary between the outburst induction zone I and the fracture development zone II; the ends of boreholes B1, B2...BX are located within the fracture development zone II; the end of borehole B1 is located at the boundary between the fracture development zone II and the fracture filling zone III. The vertical spacing of the boreholes is the drainage radius affected by the hydraulic slotting borehole Z = 1.2m. The angle θ between boreholes B1, B2...BX and the tunneling face is 60°. The number of type B boreholes X is calculated to be 16. The end of borehole C is located in the fracture filling zone III.

[0039] c. Perforation and anti-reflection: as shown in the attached document. Figure 1 As shown, in this embodiment, the water injection module (2a) in the fluid injection module (2) is arranged first, the water plunger pump (2-4) and solenoid valve I (2-3) are turned on, the water plunger pump (2-4) is used to pressurize the mine water to 30-50MPa, the rapid diversion port system I (2-9) is turned on, the guide nozzle (2-10) located in the B1, B2...BX boreholes is used to perform hydraulic cavity creation and form cavities D1, D2...DX. The guide nozzle (2-10) changes the rotation angle in the cavities D1, D2...DX to perform full-area hydraulic slotting and permeability enhancement in the fracture development zone II. The residual water flow and coal powder are discharged through the B1, B2...BX boreholes.

[0040] d. Pressure relief and enhanced permeability: as shown in the appendix Figure 2 and 4As shown, in this embodiment, a multi-functional monitoring module (3) is arranged; a gas extraction module (2c) is arranged, and the high-pressure water diversion branch pipe and guide nozzle (2-10) in the B2…BX borehole are removed, while the guide nozzle (2-10) and high-pressure water diversion branch pipe in borehole B1 are retained and connected separately to the gas-liquid mixing and conveying pipe (2-8), and the gas-liquid mixing and conveying pipe (2-8) is connected to the gas extraction module (2c); a malathion injection module (2d) is arranged; a slurry injection module (2b) is arranged, and the solenoid valve II (2-12) and slurry plunger pump (2-13) are opened, and the slurry is pressurized to 4-10MPa using the slurry plunger pump (2-13), and the rapid diversion port system II (2-16) is opened to inject the slurry at a fixed rate. The slurry is injected into the high-pressure mine sealing devices (2-17) located in boreholes A, B1, B2...BX, and C respectively. After the slurry has filled the rock fissures in the bottom borehole area and returned from the return pipe (2-17d), the slurry plunger pump (2-13) and the rapid diversion port system II (2-16) are turned off to stop the slurry injection. After the slurry cools down, the gas extraction pump (2-22), solenoid valve IV (2-21), and solenoid valve VI (2-24) are turned on to extract coal seam gas for pressure relief and permeability enhancement. When the gas pressure in borehole A is reduced to 3% of the original value by the multi-functional monitoring sensor I (3-1), the extraction is stopped, and the gas extraction pump (2-22), solenoid valve IV (2-21), and solenoid valve VI (2-24) are turned off.

[0041] e. Reinforcement of Crack-Filled Zone III: As shown in the attached document. Figure 2 As shown, in this embodiment, after depressurization and permeation enhancement, the Maresan plunger pump (2-28) and solenoid valve VII (2-27) are turned on. The Maresan plunger pump (2-28) is used to pressurize the Maresan to 4MPa and inject it into borehole C at a fixed rate to reinforce the fracture filling zone III. The multi-functional monitoring sensor II (3-4) monitors the deformation of the coal body. If the deformation rate is less than 0.1% within 10 minutes, the injection is stopped.

[0042] f. Gas filling: as shown in the appendix Figure 2 As shown, in this embodiment, the gas extraction pump (2-22), solenoid valve III (2-20), and solenoid valve V (2-23) are turned on and controlled to maintain the CO2 state in the injection pipeline at 3-5 MPa, the same temperature as the coal body, and in a gaseous state. CO2 gas is filled into the fracture development zone II at a fixed rate. Multifunctional monitoring sensors I (3-1) and II (3-4) monitor the gas pressure at boreholes A and C. When the gas pressure at borehole A is 3 MPa and the gas pressure change at borehole C is less than 20%, the gas filling is stopped, and the gas extraction pump (2-22), solenoid valve III (2-20), and solenoid valve V (2-23) are turned off.

[0043] g. Emphasis on induction: as shown in the appendix Figure 2 and3 As shown, in this embodiment, a protrusion induction module (1) is arranged to break the coal body I in the protrusion induction zone through a remote detonator (1-1) and induce the coal body in the fracture development zone II to protrude.

[0044] In this embodiment, the high-pressure mine sealing device in the slurry injection module is kept in a sealed connection with the pipelines and lines existing in the borehole, and the connection can withstand a high pressure of 20MPa.

Claims

1. A high-fidelity simulation system for coal and gas outburst disaster scenarios, characterized in that: It includes a prominent induction module (1), a fluid injection module (2), and a multi-functional monitoring module (3); The protruding induction module (1) includes a remote detonator (1-1), an explosive safety lead (1-2), and a mining explosive (1-3) connected to the end of the lead. The fluid injection module (2) includes a water injection module (2a), a slurry injection module (2b), a gas extraction module (2c), and a malathion injection module (2d). The water injection module (2a) includes a solenoid valve I (2-3) connected to a downhole water pipe (2-1) at one end of a water delivery pipe (2-2). The other end of the solenoid valve I (2-3) is connected to the inlet of a water plunger pump (2-4). The outlet of the water plunger pump is connected to a gas-liquid mixing delivery pipe (2-8) equipped with a pressure gauge I (2-5), a flow meter (2-6), and a thermometer (2-7). The gas-liquid mixing delivery pipe (2-8) is connected to a rapid diversion connector system I (2-9). Each high-pressure water diversion branch pipe connected to the rapid diversion connector system I (2-9) extends into the bottom of boreholes B1, B2...BX and is connected to the guide nozzle (2-10) at the end of each borehole; the slurry injection module (2b) includes a slurry delivery main pipe (2-14) connected to the slurry storage tank (2-11). The slurry delivery main pipe (2-14) is sequentially equipped with a slurry delivery solenoid valve II (2-12), a slurry plunger pump (2-13), a pressure gauge II (2-15), and a rapid diversion connector system II (2-16) at the end. Each high-pressure water diversion branch pipe connected to the rapid diversion connector system II (2-16) extends into the bottom of boreholes B1, B2...BX and is connected to the guide nozzle (2-10) at the end of each borehole. The liquid distribution branch pipes extend into boreholes A, B1, B2…BX, and C respectively and are each connected to a high-pressure mine sealing device (2-17) placed in the borehole; the gas extraction module (2c) includes a solenoid valve III (2-20) connected to a CO2 storage tank (2-18) via a CO2 delivery pipe (2-19). The other end of solenoid valve III (2-20) is connected to solenoid valve IV (2-21) and the inlet of the gas extraction pump (2-22) via a double-port. The gas-liquid mixing delivery pipe (2-8) is connected to the other end of solenoid valve IV (2-21) and solenoid valve V (2-23) via a double-port. The other end of solenoid valve V (2-23) is connected to… The gas extraction pump (2-22) outlet and solenoid valve VI (2-24) are connected to the gas extraction pump outlet and solenoid valve VI (2-24) respectively through a double-port connection. The other end of solenoid valve VI (2-24) is connected to the downhole gas extraction pipeline (2-25). The Marisan injection module (2d) includes a Marisan plunger pump (2-28). The inlet of the Marisan plunger pump (2-28) is connected to the Marisan storage tank (2-26) through solenoid valve VII (2-27). The outlet of the Marisan plunger pump (2-28) is connected to the Marisan injection pipe (2-29) equipped with pressure gauge III (2-30). The Marisan injection pipe (2-29) extends into the bottom of borehole C and is connected to the Marisan nozzle (2-31). The multi-functional monitoring module (3) includes a terminal display (3-2) and multi-functional monitoring sensors I (3-1) and II (3-4) located at the bottom of boreholes A and C respectively and connected to the terminal display (3-2) via a data transmission cable (3-3).

2. The coal and gas outburst disaster scenario simulation system according to claim 1, characterized in that: The mining explosives (1-3) are arranged in three rows. The first and second rows are parallel to the top and bottom surfaces of the coal seam, and the third row is tilted downwards at a 15° angle. The first, second, and third rows are at a 60° angle to the horizontal surface of the tunneling face. The horizontal distance between the end of the explosive drill hole and the end of borehole A is 1.5-3m.

3. The coal and gas outburst disaster scenario simulation system according to claim 1, characterized in that: The high-pressure resistant mining sealing device (2-17) includes an upper sealing belt (2-17a), a lower sealing belt (2-17c), a grout return pipe (2-17d), and a rupture valve (2-17b) connected to the upper and lower sealing belts via a grouting pipe. Fixed probes (2-17e) are installed on the lower half of the upper sealing belt (2-17a) and the upper half of the lower sealing belt (2-17c). The upper sealing belt (2-17a) and the lower sealing belt (2-17c) of the high-pressure resistant mining sealing device (2-17) are located in the bottom plate drilling area. The rupture valve (2-17b) withstands a critical pressure of 4 MPa.

4. The coal and gas outburst disaster scenario simulation system according to claim 1, characterized in that: The guide nozzle (2-10) includes a guide (2-10a), a guide shaft (2-10b), and a nozzle (2-10c). The guide shaft can control the rotation range of the guide to 0-360°.

5. The coal and gas outburst disaster scenario simulation system according to claim 1, characterized in that: The multifunctional monitoring sensors I (3-1) and II (3-4) are attached to the borehole wall near the B1 to BX boreholes and can monitor coal body strain, internal fracture development characteristics and cavity pressure; the terminal display (3-2) can display the monitoring data of multifunctional monitoring sensors I (3-1) and II (3-4) in real time.

6. The method for realistically simulating coal and gas outburst disaster scenarios according to any one of claims 1-5, characterized in that: Includes the following steps: a. Zone division: The coal mine tunneling face is divided into four zones along the tunneling direction: outburst induction zone I, fracture development zone II, fracture filling zone III, and original stress zone IV. The boundary between outburst induction zone I and fracture development zone II is 3-5m away from the tunneling face. The distance between the coal boundary between fracture development zone II and fracture filling zone III and the tunneling face is L, where L ranges from 8-15m. b. Bottom plate drilling: Drilling is carried out along the bottom drainage roadway of the coal seam to form boreholes A, B1, B2...BX, C. The end of borehole A is located in the central area of ​​the boundary between the outburst induction zone I and the fracture development zone II; the ends of boreholes B1, B2...BX are located within the fracture development zone II; the end of borehole B1 is located at the boundary between the fracture development zone II and the fracture filling zone III. The number X of type B boreholes is the smallest integer not less than L / (Z·cosθ). The vertical spacing of the boreholes is Z, where the size of Z is the same as the radius of influence of hydraulic slotting boreholes, m, and θ is the angle between boreholes B1, B2...BX and the tunneling face; the end of borehole C is located in the fracture filling zone III. c. Perforation and Permeability Enhancement: According to claims 1 and 4, the water injection module (2a) in the fluid injection module (2) is arranged first, the water plunger pump (2-4) and the solenoid valve I (2-3) are turned on, the water plunger pump (2-4) is used to pressurize the mine water to 30-50MPa, the rapid diversion port system I (2-9) is turned on, the guide nozzle (2-10) located in the B1, B2...BX boreholes is used to perform hydraulic cavity creation and form cavities D1, D2...DX. The guide nozzle (2-10) changes the rotation angle in the cavities D1, D2...DX to perform full-area hydraulic permeation enhancement of the fracture development zone II. The residual water flow and coal dust are discharged through the B1, B2...BX boreholes. d. Pressure relief and permeability enhancement: Arrange the multi-functional monitoring module (3) according to claims 1 and 5; arrange the gas extraction module (2c) according to claim 1, remove the high-pressure water diversion branch pipe and guide nozzle (2-10) in boreholes B2…BX, retain the guide nozzle (2-10) and high-pressure water diversion branch pipe in borehole B1 and connect them separately to the gas-liquid mixing and conveying pipe (2-8), and connect the gas-liquid mixing and conveying pipe (2-8) to the gas extraction module (2c); arrange the malathion injection module (2d) according to claim 1; According to claims 1 and 3, the slurry injection module (2b) is arranged, the solenoid valve II (2-12) and the slurry plunger pump (2-13) are turned on, the slurry is pressurized to 4-10 MPa using the slurry plunger pump (2-13), the rapid diversion port system II (2-16) is turned on, and the slurry is injected at a fixed rate into the high-pressure mine sealing devices (2-17) located in boreholes A, B1, B2...BX, C respectively. After the slurry has filled the rock cracks in the bottom plate borehole area, it is returned from the slurry return pipe (2-17d). Afterwards, shut down the slurry plunger pump (2-13) and the rapid diversion port system II (2-16) to stop slurry injection; after the slurry condenses, turn on the gas extraction pump (2-22), solenoid valve IV (2-21) and solenoid valve VI (2-24) to extract coal seam gas, depressurize and increase permeability. When the multi-functional monitoring sensor I (3-1) monitors the gas pressure in borehole A and it decreases to 3% of the original value, stop extraction and shut down the gas extraction pump (2-22), solenoid valve IV (2-21) and solenoid valve VI (2-24). e. Reinforcement of fracture-filled zone III: After depressurization and permeability enhancement, turn on the Marisan plunger pump (2-28) and solenoid valve VII (2-27), use the Marisan plunger pump (2-28) to pressurize the Marisan to 4MPa, and inject it into borehole C at a fixed rate to reinforce fracture-filled zone III. Multifunctional monitoring sensor II (3-4) monitors the deformation of the coal body. If the deformation rate is less than 0.1% within 10 minutes, stop the injection. f. Gas filling: Turn on the gas extraction pump (2-22), solenoid valve III (2-20) and solenoid valve V (2-23) to control the CO2 state in the injection pipeline to be maintained at 3-5MPa, the same temperature as the coal body, and in a gaseous state. Fill the fracture development zone II with CO2 gas at a fixed rate. Multifunctional monitoring sensors I (3-1) and II (3-4) monitor the gas pressure at boreholes A and C. When the gas pressure at borehole A is 3MPa and the gas pressure change at borehole C is less than 20%, stop the gas filling and turn off the gas extraction pump (2-22), solenoid valve III (2-20) and solenoid valve V (2-23). g. Outburst induction: According to claims 1 and 2, an outburst induction module (1) is arranged to break the coal body I in the outburst induction zone by a remote detonator (1-1) to induce outburst of the coal body in the fracture development zone II.

7. The method for realistically simulating coal and gas outburst disaster scenarios according to claim 6, characterized in that: The high-pressure mine sealing device (2-17) in the slurry injection module (2b) is kept in a sealed connection with the pipelines and lines that exist in the borehole, and the connection can withstand a high pressure of 20MPa.

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