Energy-gathered blasting cracking simulation test bench for gas-containing coal body and use method thereof

Abstract

The invention relates to the technical field of simulation test stands, in particular to a shaped charge blasting cracking simulation test stand for a gas-containing coal body and a use method of the shaped charge blasting cracking simulation test stand. According to the technical scheme, the shaped charge blasting cracking simulation test bed for the gas-containing coal body comprises a first control table, a test observation integration module, an ignition assembly, a second control table, a first gas cylinder and a second gas cylinder; the test observation integration module is communicated between the first console and the second console to form integrated arrangement, the gas coal shaped charge blasting cracking simulation performance is improved, the ignition assembly is arranged, a plurality of conveying pipes are arranged, any node or a plurality of nodes are selected for ignition, the maximum simulation performance is improved, and the gas coal shaped charge blasting cracking simulation performance is improved. A plurality of floating points are annularly arranged along the side wall of a high-pressure glass roadway simulation pipe in the test observation integrated module, so that multi-node detection is formed, and the overall simulation test effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of simulation test benches, in particular to a simulation test bench for blasting and fracturing of gas-containing coal bodies and a use method thereof. Background Art

[0002] Gas coal refers to coal seams or coal bodies containing gas. These gasses will be released during coal mining, and their main components include methane and carbon dioxide. Gas coal has the characteristics of high gas content and easy release. If not handled properly, it is very easy to cause serious safety accidents such as gas explosions and coal and gas outbursts during coal mining. In order to deeply understand the rupture mechanism of gas coal under blasting, researchers usually simulate concentrated blasting under different gas pressures and observe the formation and expansion of coal cracks, so as to provide an intuitive basis for the formulation of relevant safety measures.

[0003] However, the current simulation test system, which usually consists of a medium box, a test chamber and a control system, has certain limitations. Among them, the test chamber can often only simulate simple tunnel structures, which greatly limits the accuracy of the test and the scope of practical application. In addition, the sensor layout is too simple, resulting in single data collection, making it difficult to fully and accurately capture and record the changes in various parameters of the gas coal body during the blasting process, which in turn affects the effect and reliability of the overall simulation test. For this reason, a simulation test bench for the blasting fracturing of gas-containing coal bodies can be designed. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the problem that the existing test chamber can only simulate simple tunnel structures, which limits the accuracy and application scope of the test, the sensor layout is simple, the data collection is single, it is difficult to comprehensively capture and record the various parameter changes of the gas coal body during the blasting process, and the overall simulation test effect is reduced.

[0005] The technical solution of the present invention is as follows: the present invention is a test bench for simulating the blasting and fracturing of a gas-containing coal body, comprising: an integrated test observation module for simulating the blasting and fracturing of a gas-containing coal body; a first control console, which is arranged on one side of the integrated test observation module and is connected to the integrated test observation module; a second control console, which is arranged on the other side of the integrated test observation module and is connected to the integrated test observation module; an ignition assembly, the top of the integrated test observation module is connected to an ignition assembly for igniting gas to produce a bursting state; a first gas cylinder, which is arranged on the top of the first control console and is suitable for supplying gas to the integrated test observation module. The gas is injected into the block; a second gas cylinder is arranged on the top of the second console and is suitable for collecting the gas in the test observation integrated module; wherein the test observation integrated module includes: a high-pressure protection cabin, which is provided with an inner cavity for high-pressure protection buffering; a high-pressure glass tunnel simulation tube, a high-pressure glass tunnel simulation tube is provided at the center of the inner cavity, wherein the gas in the first gas cylinder can be injected into the high-pressure glass tunnel simulation tube, and the second gas cylinder can extract the gas in the high-pressure glass tunnel simulation tube; a bottom bracket, which is arranged at the bottom of the high-pressure glass tunnel simulation tube and supports the high-pressure glass tunnel simulation tube in the high-pressure protection cabin.

[0006] Further, the test observation integrated module also includes: a high-temperature sealing ring sleeve, both ends of the high-pressure glass tunnel simulation tube are provided with the high-temperature sealing ring sleeve that is sealed and connected to the high-pressure protection cabin; a plurality of floating points for sensing the impact of energy-gathering blasting and cracking are provided along the circumferential edge of the side wall of the high-pressure glass tunnel simulation tube, and a plurality of impact signal devices corresponding to the floating points are provided along the circumferential edge of the outer end of the high-pressure glass tunnel simulation tube; an explosion-proof floating inner ring and an explosion-proof floating outer ring, the outer periphery of the high-pressure glass tunnel simulation tube is provided with an explosion-proof floating inner ring and an explosion-proof floating outer ring in sequence toward the outer sleeve; wherein, the explosion-proof floating inner ring and the explosion-proof floating outer ring are both arranged in a circumferential direction in multiple groups, and a pressure relief gap is formed between the multiple groups of explosion-proof floating inner rings and the explosion-proof floating outer rings, an impact rod, and the multiple groups of explosion-proof floating inner rings and the explosion-proof floating outer rings are provided with impact rods extending to the high-pressure protection cabin and through holes for the impact rods to pass through in sequence; a pressure contactor, which is arranged between the impact rod and the high-pressure protection cabin; a flashing screen, and a flashing screen is electrically provided at the outer end of the pressure contactor.

[0007] Furthermore, the side walls of the multiple groups of explosion-proof floating inner rings and explosion-proof floating outer rings are coated with a high-temperature resistant coating.

[0008] Furthermore, the first console and the second console are each provided with a connecting port connected to the test observation integrated module on one side opposite to the first console, a control valve is provided inside the connecting port, and the control valve is covered with three layers of oscillation protection diaphragms on the side facing the test observation integrated module. The first console and the second console have the same structural arrangement, a pressure plate is fixedly connected to the bottom of the opposite end of the first console and the second console, and an air compressor is provided at the far end of the first console and the second console.

[0009] Furthermore, a shock-absorbing bracket is distributed at the bottom of the pressure plate, a shock-absorbing rubber damper is arranged inside the shock-absorbing bracket, a floating plate is symmetrically arranged on the top of the pressure plate, a rubber damping layer is arranged between the two groups of floating plates, and a detection module for monitoring and controlling the gas content inside the pipeline is fixedly connected to the inside of the first console and the second console, and the detection module includes a meter, an ignition control module and a signal statistics module. Data display screens and control buttons are arranged on the first console and the second console, a maintenance door is arranged on the outer side of the bottom of the first console and the second console, and the first console and the second console are provided with a back panel on the side away from the data display screen, and a plurality of rear racks are arranged horizontally on the back panel, and a pedal is provided on the end of the rear rack away from the back panel.

[0010] Furthermore, the ignition assembly includes: a balance frame, both ends of which are provided with fixing blocks fixed to the first control console and the second control console; multiple groups of delivery pipes, multiple groups of delivery pipes are provided along the balance frame, multiple groups of rubber shock-absorbing dampers are provided along the delivery pipes, and an ignition check valve is provided at the lower end of the delivery pipe; an ignition module, an ignition module is provided on the top of the delivery pipe, and an outer sleeve of the ignition module is provided with a thermal insulation sleeve.

[0011] Furthermore, the first gas cylinder has the same structural arrangement as the second gas cylinder; the first gas cylinder comprises: a bottle body, a solenoid control valve is provided on the top; an air pressure sensor, an air pressure sensor is provided inside the solenoid control valve; a signal light cover is detachably arranged on the top of the solenoid control valve; wherein, the outer end of the solenoid control valve is connected to an air inlet pipe, the outer end of the air pressure sensor is provided with a control cable, the bottom of the first gas cylinder is provided with an input pipe, and the outer sleeve of the first gas cylinder is provided with an airtight sleeve.

[0012] The present invention also discloses a method for using a gas-containing coal body intensive energy blasting fracturing simulation test bench, comprising the following steps:

[0013] S1. Use the air intake pipe to connect the dilution gas pipe, remove the detachable signal light cover, put the gas-containing coal into the first gas cylinder for storage in turn, adjust the parameters on the data display screen through the control button, and use the air compressor to evacuate and reduce the pressure inside the high-pressure glass tunnel simulation tube to simulate the tunnel situation. The excess gas is discharged to the second gas cylinder through the second control console. After the air pressure sensor senses a certain concentration, the dilution gas enters the first gas cylinder to reduce the gas, and the synchronous electromagnetic control valve is opened to gradually send gas into the high-pressure glass tunnel simulation tube in the test observation integrated module. The meter, ignition control module and signal statistics module control the amount of each entry, and the electromagnetic control valve is closed after the test capacity is reached;

[0014] S2. Then wait for a while to allow the gas to fill the entire high-pressure glass tunnel simulation tube, simulate the gas flow state, start the electronically controlled ignition component, and the ignition module drives the ignition check valve to be controlled by the delivery pipe. Multiple groups of delivery pipes are set up, and any node or multiple nodes can be selected for ignition according to needs to increase the maximum simulation;

[0015] S3. The flame of any node or multiple nodes instantly contacts the gas to produce a rapid burst. The burst intensity quickly fills the high-pressure glass tunnel simulation tube and collides with the floating point. The floating point is connected to the impact signal device to perform a rapid agitation collision on the impact rod, so that the impact rod contacts the pressure contactor, and the kinetic energy is converted into an electrical signal and transmitted to the flashing screen. With the burst intensity, the corresponding intensity data will flash on the flashing screen, and the test status can be intuitively seen. With the spread of intensity, the explosion-proof floating inner ring and the explosion-proof floating outer ring are arranged in a ring direction to form an encircling layer-by-layer decreasing outward intensity, forming a safe pressure relief protection. The pressure relief gap is used between multiple groups of explosion-proof floating inner rings and explosion-proof floating outer rings to gradually reduce the strength impact. The rubber shock-absorbing damper can be used to reversely offset the impact force at the moment of ignition to form structural protection.

[0016] S4. After completing a test, the electromagnetic control valve opens, the gas enters the second control console through the input pipe to the second gas cylinder, and then rises to the intake pipe and is discharged to the next mechanism. The concentration parameters are adjusted, and then the test steps are repeated.

[0017] Beneficial effects of the present invention:

[0018] 1. In the past, the test chamber had limitations in simulating tunnel structures and could only simulate simple structures, which greatly limited the accuracy and application scope of the test. At the same time, the layout of sensors was too simple, resulting in single data collection, making it difficult to fully capture and record the changes in various parameters of gas coal during blasting;

[0019] The present invention sets up the first control console and the second control console for flexible adjustment of gas injection and recovery; the first control console is equipped with the first gas cylinder and the second gas cylinder on the top, and is arranged in three groups, which can inject gas and recover gas to the test observation integrated module singly or synchronously to realize a cycle operation. According to the different gas concentrations each time, we can adjust the parameters accordingly to achieve the best burst test effect. The test observation integrated module is cleverly arranged between the first control console and the second control console to form an integrated design. This design not only improves the simulation performance of gas coal body energy blasting and cracking, but also makes the entire test system more compact and efficient. Multiple delivery pipes are set through the ignition assembly, and any node or multiple nodes can be flexibly selected for ignition; this improvement greatly increases the diversity and maximum simulation of the simulation, so that the test can more realistically reflect the actual situation. The high-pressure glass tunnel simulation tube inside the test observation integrated module is set with multiple floating points along the side wall; these floating points form multi-node detection, which can more comprehensively capture and record the various parameter changes of the gas coal body during the blasting process, thereby significantly improving the accuracy and effect of the overall simulation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the simulation test bench of the present invention;

[0021] Figure 2 This is a schematic diagram of the first control console of the simulation test bench of the present invention;

[0022] Figure 3 This is a schematic diagram of the first control console of the simulation test bench of the present invention from another angle;

[0023] Figure 4 This is a schematic diagram of the integrated module for the simulation test bench test observation of the present invention;

[0024] Figure 5 This is a schematic diagram of a high-pressure glass tunnel simulation tube of a simulation test bench of the present invention;

[0025] Figure 6 This is a schematic diagram of the ignition assembly of the simulation test bench of the present invention;

[0026] Figure 7 This is a schematic diagram of the ignition assembly of the simulation test bench of the present invention from another angle;

[0027] Figure 8 This is a schematic diagram of the first gas cylinder of the simulation test bench of the present invention.

[0028] Explanation of reference numerals: 1. first control console; 2. test observation integrated module; 3. ignition assembly; 4. second control console; 5. first gas cylinder; 6. second gas cylinder; 101. air compressor; 102. maintenance door; 103. control button; 104. data display screen; 105. pressure plate; 106. shock-absorbing bracket; 107. back plate; 108. rear rack; 109. pedal; 110. floating plate; 111. rubber damping layer; 201. flashing screen; 202. pressure sensor; 203. inner cavity; 204. high-temperature sealing ring sleeve; 205. explosion-proof floating inner ring; 206. explosion-proof floating outer ring ; 207, perforation; 208, high-pressure glass tunnel simulation tube; 209, floating point; 210, impact rod; 211, impact signal; 212, bottom bracket; 213, high-pressure protection cabin; 214, high-temperature resistant coating; 301, balance frame; 302, fixing block; 303, delivery pipe; 304, ignition module; 305, rubber shock absorber; 306, insulation sleeve; 307, ignition check valve; 501, solenoid control valve; 502, air pressure sensor; 503, detachable signal light cover; 504, intake pipe; 505, input pipe; 506, control cable; 507, airtight sleeve. DETAILED DESCRIPTION

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] See also Figure 1 The present invention provides an embodiment: a test bench for simulating the blasting and fracturing of a gas-containing coal body, comprising a first control console 1, a test observation integrated module 2, an ignition component 3, a second control console 4, a first gas cylinder 5 and a second gas cylinder 6; the first control console 1 and the second control console 4 are used to adjust the relative settings of gas injection recovery and parameter adjustment, the first control console 1 and the second control console 4 are connected to each other and provided with a test observation integrated module 2 for simulating the blasting and fracturing of a gas-containing coal body, the top of the test observation integrated module 2 is connected to an ignition component 3 for igniting gas to produce a bursting state, three groups of first gas cylinders 5 connected to the test observation integrated module 2 for injecting gas are arranged horizontally on the top of the first control console 1, and three groups of second gas cylinders 6 connected to the test observation integrated module 2 for recovering gas are arranged horizontally on the top of the second control console 4.

[0032] See also Figure 1-3In this embodiment, a communication port connected to the test observation integrated module 2 is provided on the opposite side of the first control console 1 and the second control console 4, a control valve is provided inside the communication port, and the control valve is covered with a three-layer oscillation protection diaphragm on the side facing the test observation integrated module 2. The first control console 1 and the second control console 4 have the same structural arrangement, a pressure plate 105 is fixedly connected to the bottom of the opposite end of the first control console 1 and the second control console 4, an air compressor 101 is provided at the far end of the first control console 1 and the second control console 4, a shock-absorbing bracket 106 is distributed at the bottom of the pressure plate 105, a shock-absorbing rubber damper is provided inside the shock-absorbing bracket 106, and a floating plate 110 is symmetrically provided on the top of the pressure plate 105. A rubber damping layer 111 is provided between the two groups of floating plates 110. A detection module for monitoring and controlling the gas content inside the pipeline is fixedly connected inside the first control console 1 and the second control console 4. The detection module includes a meter, an ignition control module and a signal statistics module. A data display screen 104 and a control button 103 are arranged on the first control console 1 and the second control console 4. A maintenance door 102 is provided on the outer side of the bottom of the first control console 1 and the second control console 4. A back plate 107 is provided on the side of the first control console 1 and the second control console 4 away from the data display screen 104. A plurality of rear racks 108 are horizontally provided on the back plate 107. A pedal 109 is provided on the end of the rear rack 108 away from the back plate 107.

[0033] The design of the first control console 1 and the second control console 4 fully considers the accuracy, safety and convenience of the test. Both of them have a connecting port connected to the test observation integrated module 2 on the opposite side, and a built-in control valve to ensure the precise control of the gas during the test. The side of the control valve facing the test observation integrated module is covered with a three-layer oscillation protection diaphragm, which effectively isolates external interference and ensures the stability of the test. At the same time, the first control console and the second control console adopt the same structural design, which is easy to operate and manage. In terms of structural strength and shock absorption, the pressure plate 105 is fixed to the bottom of the opposite end of the first control console 1 and the second control console 4 to enhance the overall load-bearing capacity. The shock-absorbing bracket 106 at the bottom of the pressure plate and the internal shock-absorbing rubber damper effectively absorb the vibration during the test and improve the durability of the equipment. In addition, the floating plate 110 on the top of the pressure plate and the rubber damping layer 111 between the two groups of floating plates further enhance the shock absorption effect and ensure the accurate conduct of the test;

[0034] In terms of monitoring and control, the first console 1 and the second console 4 are both fixed with detection modules, including meters, ignition control modules and signal statistics modules. These modules can monitor the gas content inside the pipeline in real time and perform precise control as needed. In particular, the ignition control module model is RSB-07 and the meter model is gth1000, which ensures the accuracy and reliability of the test.

[0035] See also Figure 4-6In this embodiment, the test observation integrated module 2 includes a flashing screen 201, a pressure contactor 202, an inner cavity 203, a high-temperature sealing ring sleeve 204, an explosion-proof floating inner ring 205, an explosion-proof floating outer ring 206, a perforation 207, a high-pressure glass tunnel simulation tube 208, a floating point 209, a striking rod 210, a striking signal device 211, a bottom bracket 212 and a high-pressure protection cabin 213. The interior of the high-pressure protection cabin 213 is provided with an inner cavity 203 for high-pressure protection buffering, and the center of the inner cavity 203 is provided with a high-pressure A glass tunnel simulation tube 208, a bottom of the high-pressure glass tunnel simulation tube 208 is symmetrically provided with a bottom bracket 212 which is integrally formed with the high-pressure protection cabin 213 to maintain overall stability, both ends of the high-pressure glass tunnel simulation tube 208 are provided with high-temperature sealing ring sleeves 204, a plurality of floating points 209 for sensing impact caused by concentrated energy blasting and cracking are provided along the circumferential edge of the side wall of the high-pressure glass tunnel simulation tube 208, and a plurality of impact signal devices 211 corresponding to the floating points 209 are provided along the circumferential edge of the outer end of the high-pressure glass tunnel simulation tube 208.

[0036] See also Figure 5-7 In this embodiment, the outer periphery of the high-pressure glass tunnel simulation tube 208 is sequentially provided with an explosion-proof floating inner ring 205 and an explosion-proof floating outer ring 206 toward the outer sleeve, and the explosion-proof floating inner ring 205 and the explosion-proof floating outer ring 206 are both arranged in a ring direction in multiple groups, and a pressure relief gap is formed between the multiple groups of explosion-proof floating inner rings 205 and the explosion-proof floating outer rings 206. The multiple groups of explosion-proof floating inner rings 205 and the explosion-proof floating outer rings 206 are sequentially penetrated with impact rods 210 extending to the high-pressure protection cabin 213, and the multiple groups of explosion-proof floating inner rings 205 and the explosion-proof floating outer rings 206 are provided with through holes 207 corresponding to the impact rods 210, and a pressure contactor 202 is provided between the impact rod 210 and the high-pressure protection cabin 213, and the outer end of the pressure contactor 202 is electrically provided with a flashing screen 201 The side walls of multiple groups of explosion-proof floating inner rings 205 and explosion-proof floating outer rings 206 are coated with high-temperature resistant coatings 214. The ignition assembly 3 includes a balance frame 301, a fixing block 302, a delivery pipe 303, an ignition module 304, a rubber shock-absorbing damper 305, a thermal insulation sleeve 306 and an ignition check valve 307. Both ends of the balance frame 301 are provided with a fixing block 302 fixed to the first control console 1 and the second control console 4. Multiple groups of delivery pipes 303 are provided along the upper edge of the balance frame 301. Multiple groups of rubber shock-absorbing dampers 305 are sleeved along the upper edge of the delivery pipe 303. An ignition check valve 307 is provided at the lower end of the delivery pipe 303. An ignition module 304 is provided at the top of the delivery pipe 303. The outer sleeve of the ignition module 304 is provided with a thermal insulation sleeve 306.

[0037] The explosion-proof floating inner ring 205 and the explosion-proof floating outer ring 206 are sequentially set around the outer periphery of the high-pressure glass tunnel simulation tube. Not only do they enhance the stability of the structure through multiple sets of annular settings, but they also cleverly form a pressure relief gap, effectively alleviating the pressure shock caused by the explosion. At the same time, multiple sets of impact rods 210 penetrate these explosion-proof rings and are connected to the pressure-sensing device 202 in the high-pressure protection cabin 213. Once triggered, they can quickly feedback through the flashing screen 201, realizing real-time monitoring and early warning of the explosion process. The side walls of the explosion-proof floating inner ring and outer ring are coated with a high-temperature resistant coating 214. This design greatly improves the tolerance of the simulation tube in a high-temperature environment and ensures the continuity and accuracy of the test. The high-temperature resistant coating 214 is made of heat-resistant resin (such as silicone, polytitanate, aromatic heterocyclic polymer, etc.), heat-resistant pigment (such as mica, iron oxide, graphite, etc.) and various fillers.

[0038] See also Figure 8 In this embodiment, the first gas cylinder 5 has the same structural arrangement as the second gas cylinder 6. An electromagnetic control valve 501 is provided on the top of the first gas cylinder 5. An air pressure sensor 502 is provided inside the electromagnetic control valve 501. A detachable signal light cover 503 is provided on the top of the electromagnetic control valve 501. An air inlet pipe 504 is connected to the outer end of the electromagnetic control valve 501. A control cable 506 is provided on the outer end of the air pressure sensor 502. The model of the air pressure sensor 502 is XMSJGY-BMP280-3.3V. An input pipe 505 is provided at the bottom of the first gas cylinder 5. An airtight sleeve 507 is provided on the outer sleeve of the first gas cylinder 5.

[0039] According to another aspect of the present invention, a method for using a gas-containing coal body accumulative blasting fracturing simulation test bench is provided, comprising the following steps:

[0040] S1. Use the air intake pipe 504 to connect the dilution gas pipe, remove the detachable signal light cover 503, put the gas-containing coal into the first gas cylinder 5 for storage in turn, adjust the parameters on the data display screen 104 by operating the button 103, and the air compressor 101 evacuates and reduces the pressure inside the high-pressure glass tunnel simulation tube 208 to simulate the tunnel situation. The excess gas is discharged to the second gas cylinder 6 through the second control console 4. After the air pressure sensor 502 senses a certain concentration, the dilution gas enters the first gas cylinder 5 to reduce the gas, and the synchronous electromagnetic control valve 501 is opened to gradually send gas into the high-pressure glass tunnel simulation tube 208 in the test observation integrated module 2. The meter, ignition control module and signal statistics module control the amount of each entry, and the electromagnetic control valve 501 is closed after the test capacity is reached;

[0041] S2, then wait for a while to allow the gas to fill the entire high-pressure glass tunnel simulation tube 208, simulate the gas flow state, start the electronically controlled ignition component 3, and the ignition module 304 drives the ignition check valve 307 to be controlled by the delivery pipe 303. Multiple groups of delivery pipes 303 are set, and any node or multiple nodes can be selected for ignition according to needs to increase the maximum simulation;

[0042] S3, the flame of any node or multiple nodes contacts the gas to produce a rapid explosion, and the explosion intensity quickly fills the high-pressure glass tunnel simulation tube 208 and collides with the floating point 209. The floating point 209 is connected to the impact signal device 211 to perform a rapid agitation collision on the impact rod 210, so that the impact rod 210 contacts the pressure contactor 202, and the kinetic energy is converted into an electrical signal and transmitted to the flashing screen 201. With the intensity of the explosion, the corresponding intensity data will flash on the flashing screen 201, and the test state can be intuitively seen. With the diffusion of intensity, the explosion-proof floating inner ring 205 and the explosion-proof floating outer ring 206 are arranged in a ring direction to form an encircling layer-by-layer decreasing outward intensity, forming a safe pressure relief protection, and using the pressure relief gap, located between multiple groups of explosion-proof floating inner rings 205 and explosion-proof floating outer rings 206, the strength effect is gradually reduced, and the rubber shock-absorbing damper 305 can be used to reversely offset the impact force at the moment of ignition to form structural protection;

[0043] S4. After completing a test, the control valve is opened, and the gas enters the second control console 4 through the input pipe 505 to the second gas cylinder 6, rises to the gas inlet pipe 504 and is discharged to the next mechanism, the concentration parameters are adjusted, and then the test steps are repeated.

[0044] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A simulation test bench for the blasting and fracturing of gas-containing coal bodies, characterized in that: include: An integrated experimental observation module for simulation of gas coal mass blasting fracturing (2); A first control console (1), which is arranged on one side of the test observation integrated module (2) and is in communication with the test observation integrated module (2); A second control console (4), which is arranged on the other side of the test observation integrated module (2) and is in communication with the test observation integrated module (2); An ignition assembly (3), the top of the test observation integrated module (2) is connected to an ignition assembly (3) for igniting gas to produce an explosion state; A first gas cylinder (5), which is arranged on the top of the first console (1) and is suitable for injecting gas into the test observation integrated module (2); A second gas cylinder (6), which is arranged on the top of the second console (4) and is suitable for collecting the gas in the test observation integrated module (2); Wherein, the test observation integrated module (2) comprises: A high-pressure protection cabin (213) is provided with an inner cavity (203) for high-pressure protection and buffering; A high-pressure glass tunnel simulation tube (208), wherein the center of the inner cavity (203) is provided with a high-pressure glass tunnel simulation tube (208), wherein the gas in the first gas cylinder can be injected into the high-pressure glass tunnel simulation tube (208), and the second gas cylinder can extract the gas in the high-pressure glass tunnel simulation tube (208); A bottom support (212) is arranged at the bottom of the high-pressure glass tunnel simulation tube (208) and supports the high-pressure glass tunnel simulation tube (208) in the high-pressure protection cabin (213).

2. The gas-containing coal body shaped energy blasting fracturing simulation test bench according to claim 1 is characterized in that: The test observation integrated module (2) further comprises: A high-temperature sealing ring sleeve (204), wherein both ends of the high-pressure glass tunnel simulation tube (208) are provided with the high-temperature sealing ring sleeve (204) which is sealed and connected to the high-pressure protection cabin (213); A plurality of floating points (209) for sensing impact caused by concentrated energy blasting and cracking are arranged along the circumferential direction of the side wall of the high-pressure glass tunnel simulation tube (208); and a plurality of impact signal devices (211) corresponding to the floating points (209) are arranged along the circumferential direction of the outer end of the high-pressure glass tunnel simulation tube (208); An explosion-proof floating inner ring (205) and an explosion-proof floating outer ring (206) are sequentially arranged on the outer periphery of the high-pressure glass tunnel simulation tube (208) toward the outer casing; wherein the explosion-proof floating inner ring (205) and the explosion-proof floating outer ring (206) are both arranged in a ring direction in multiple groups, and a pressure relief gap is formed between the multiple groups of explosion-proof floating inner rings (205) and the explosion-proof floating outer rings (206). A striking rod (210), a plurality of groups of explosion-proof floating inner rings (205) and explosion-proof floating outer rings (206) are sequentially provided with striking rods (210) extending to the high-pressure protection cabin (213) and through holes (207) for the striking rods (210) to pass through; A pressure contactor (202), which is arranged between the impact rod (210) and the high-pressure protection cabin (213); A flashing screen (201), wherein the outer end of the touch-press device (202) is electrically provided with the flashing screen (201).

3. The shaped energy blasting fracturing simulation test bench for gas-containing coal bodies according to claim 2 is characterized in that: The side walls of the plurality of groups of explosion-proof floating inner rings (205) and explosion-proof floating outer rings (206) are all coated with a high temperature resistant coating (214).

4. The shaped energy blasting fracturing simulation test bench for gas-containing coal bodies according to claim 1 is characterized in that: The first control console (1) and the second control console (4) are provided with a connecting port connected to the test observation integrated module (2) on the opposite side thereof, a control valve is provided inside the connecting port, and the control valve is covered with a three-layer oscillation protection diaphragm on the side facing the test observation integrated module (2). The first control console (1) and the second control console (4) have the same structural arrangement, a pressure plate (105) is fixedly connected to the bottom of the opposite end of the first control console (1) and the second control console (4), and an air compressor (101) is provided at the far end of the first control console (1) and the second control console (4).

5. The shaped energy blasting fracturing simulation test bench for gas-containing coal bodies according to claim 4 is characterized in that: A shock-absorbing bracket (106) is provided at the bottom of the pressure-bearing plate (105), a shock-absorbing rubber damper is provided inside the shock-absorbing bracket (106), a floating plate (110) is symmetrically provided on the top of the pressure-bearing plate (105), a rubber damping layer (111) is provided between the two groups of floating plates (110), a detection module for monitoring and controlling the gas content inside the pipeline is fixedly connected inside the first control console (1) and the second control console (4), the detection module includes a meter, an ignition control module and a signal statistics module, the first The control console (1) and the second control console (4) are both provided with data display screens (104) and control buttons (103) in an array. A maintenance door (102) is provided on the outer sides of the bottoms of the first control console (1) and the second control console (4). A back panel (107) is provided on the side of the first control console (1) and the second control console (4) away from the data display screen (104). A plurality of rear racks (108) are transversely provided on the back panel (107). A pedal (109) is provided on the end of the rear rack (108) away from the back panel (107).

6. The shaped energy blasting fracturing simulation test bench for gas-containing coal bodies according to claim 1 is characterized in that: The ignition assembly (3) comprises: A balancing frame (301) with fixing blocks (302) fixedly connected to the first control console (1) and the second control console (4) at both ends; Multiple groups of delivery pipes (303), multiple groups of delivery pipes (303) are arranged along the upper edge of the balance frame (301), multiple groups of rubber shock absorbing dampers (305) are sleeved along the upper edge of the delivery pipes (303), and an ignition check valve (307) is arranged at the lower end of the delivery pipe (303); An ignition module (304) is provided on the top of the delivery pipe (303), and a thermal insulation sleeve (306) is provided on the outer shell of the ignition module (304).

7. The shaped energy blasting fracturing simulation test bench for gas-containing coal bodies according to claim 1 is characterized in that: The first gas cylinder (5) and the second gas cylinder (6) have the same structural arrangement; The first gas cylinder (5) comprises: The bottle body has an electromagnetic control valve (501) on the top; An air pressure sensor (502), wherein the electromagnetic control valve (501) is provided with an air pressure sensor (502); A signal lamp cover (503) is detachably arranged on the top of the electromagnetic control valve (501); The outer end of the electromagnetic control valve (501) is connected to an air inlet pipe (504), the outer end of the air pressure sensor (502) is provided with a control cable (506), the bottom of the first gas cylinder (5) is provided with an input pipe (505), and the outer sleeve of the first gas cylinder (5) is provided with an airtight sleeve (507).

8. A method for using a gas-containing coal body shaped energy blasting fracturing simulation test bench, comprising the gas-containing coal body shaped energy blasting fracturing simulation test bench according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Use the air intake pipe (504) to connect the dilution gas pipe, remove the detachable signal light cover (503), put the gas-containing coal into the first gas cylinder (5) for storage, adjust the parameters on the data display screen (104) through the control button (103), and the air compressor (101) evacuates the internal air pressure of the high-pressure glass tunnel simulation tube (208) to simulate the tunnel situation. The excess gas is discharged from the second gas cylinder (6) through the second control console (4). After the air pressure sensor (502) senses a certain concentration, the dilution gas enters the first gas cylinder (5) to reduce the gas concentration, and the synchronous electromagnetic control valve (501) is opened to gradually send gas into the high-pressure glass tunnel simulation tube (208) in the test observation integrated module (2). The meter, ignition control module and signal statistics module control the amount of gas entering each time, and the electromagnetic control valve (501) is closed after the test capacity is reached; S2, then wait for a while to allow the gas to fill the entire high-pressure glass tunnel simulation tube (208), simulate the gas flow state, start the electronically controlled ignition component (3), and the ignition module (304) drives the ignition check valve (307) to be controlled by the delivery pipe (303). Multiple groups of delivery pipes (303) are set, and any node or multiple nodes can be selected for ignition according to needs to increase the maximum simulation; S3, when the flame at any node or multiple nodes contacts the gas, a rapid explosion is generated, and the explosion intensity quickly fills the high-pressure glass tunnel simulation tube (208), and collides with the floating point (209). The floating point (209) is connected to the impact signal device (211) to perform a rapid agitation collision on the impact rod (210), so that the impact rod (210) contacts the pressure contact device (202), and the kinetic energy is converted into an electrical signal, which is transmitted to the flashing screen (201). With the intensity of the explosion, the flashing screen (201) will flash. The corresponding strength data can intuitively show the test status. As the strength spreads, the explosion-proof floating inner ring (205) and the explosion-proof floating outer ring (206) are arranged in a circular direction to form an encircling type with gradually decreasing outward strength layer by layer, forming a safe pressure relief protection. The pressure relief gap is used between multiple groups of explosion-proof floating inner rings (205) and explosion-proof floating outer rings (206) to gradually reduce the strength impact. The rubber shock-absorbing damper (305) can be used to reversely offset the impact force at the moment of ignition to form structural protection. S4. After completing a test, the control valve is opened, and the gas enters the second control console (4), passes through the input pipe (505), reaches the second gas cylinder (6), rises to the gas inlet pipe (504), and is discharged to the next mechanism. The concentration parameters are adjusted, and then the test steps are repeated.

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