High-precision multi-module dynamic simulation test device for coal and gas outburst

Abstract

This invention relates to the field of coal mine safety technology, specifically to a high-precision multi-module dynamic simulation test device for coal and gas outbursts. It primarily addresses the technical problem of the lack of existing test devices capable of accurately simulating the coal and gas outburst process. The device includes a cavity assembly, a crustal simulation assembly, a gas simulation assembly, an outburst monitoring assembly, and a data analysis processor. The cavity assembly comprises a left chamber, a middle chamber, and a right chamber. The crustal simulation assembly includes a power source, a solenoid valve, a piston, a pressure waveform generator, a pressure controller, an accelerometer, and a piezoelectric crystal sensor. The gas simulation assembly includes a gas container, a gas controller, and a gas sensor. The outburst monitoring assembly includes a strain sensor, a micro-vibration sensor, a 3D laser scanner, and a high-speed camera. This device can acquire multi-dimensional data, including mechanical, chemical, and morphological data, during the outburst process in real time, thereby ensuring simulation accuracy and providing comprehensive data support for disaster prevention and control.

Description

Technical Field

[0001] This invention relates to the field of coal mine safety technology, and in particular to a high-precision multi-module dynamic simulation test device for coal and gas outbursts. Background Technology

[0002] Coal and gas outbursts refer to the dynamic phenomenon in which coal and gas in a coal seam or rock stratum are suddenly ejected into the mining space under the combined action of ground stress and gas pressure. This poses a significant threat to safe coal mine production. In-depth research into the mechanisms of coal and gas outbursts is crucial for the prevention and control of this disaster.

[0003] However, existing coal and gas outburst simulation test devices have many shortcomings, such as difficulty in accurately simulating gas pressure changes, coal body conditions, and the dynamic process of outbursts. This makes it difficult for researchers to fully and deeply understand the essential characteristics of coal and gas outbursts, thus limiting the development of related prevention and control technologies.

[0004] Therefore, there is an urgent need for a test device that can accurately simulate the coal and gas outburst process. Summary of the Invention

[0005] To overcome the technical deficiency of existing technologies in the lack of test devices capable of accurately simulating coal and gas outburst processes, this invention provides a high-precision multi-module dynamic simulation test device for coal and gas outbursts.

[0006] The high-precision multi-module dynamic simulation test device for coal and gas outbursts provided by this invention includes:

[0007] The cavity assembly includes a left chamber, a middle chamber, and a right chamber. The top of the left chamber is provided with a packing port. The middle chamber is connected to both chambers and is provided with an opening and closing gate between it and the left chamber. The bottom of the right chamber is provided with a horizontal push-pull type support plate. The right side of the right chamber is equipped with a working pipe.

[0008] The crustal simulation component includes a power source, a solenoid valve, and a piston connected in sequence. The solenoid valve is connected in sequence to a pressure waveform generator and a pressure controller. The piston is installed in the intermediate chamber. An accelerometer and a piezoelectric crystal sensor are installed on the lower surface of the piston. The accelerometer is used to collect the motion state of the piston, and the piezoelectric crystal sensor is used to collect the pressure state of the pulverized coal in the intermediate chamber. The pressure controller is used to control the operation of the pressure waveform generator based on the collected values ​​from the accelerometer and the piezoelectric crystal sensor.

[0009] A gas simulation component includes a gas container with an outlet valve connected to the bottom of an intermediate chamber via a connecting pipe. The gas simulation component also includes a gas controller and a gas sensor located in the intermediate chamber. The gas controller is used to control the outlet valve based on the collected values ​​from the gas sensor.

[0010] The outburst monitoring component includes a mounting plate located at the top of the right chamber and a strain sensor and a micro-vibration sensor mounted on the mounting plate. The outburst monitoring component also includes a three-dimensional laser scanner and a high-speed camera. The three-dimensional laser scanner is used to scan the real-time status of the coal block in the right chamber, and the high-speed camera is used to capture the dynamic process of an outburst occurring at the working pipeline.

[0011] The data analysis processor is communicatively connected to the piezoelectric crystal sensor, gas sensor, strain sensor, micro-vibration sensor, 3D laser scanner, and high-speed camera.

[0012] Optionally, the left chamber is provided with a discharge ramp, which is used to guide pulverized coal into the intermediate chamber through the opening and closing gate.

[0013] Optionally, a gas extraction port is provided at the top of the left chamber.

[0014] Optionally, a temperature sensor is also provided in the intermediate chamber, and the temperature sensor is communicatively connected to the data analysis processor.

[0015] Optionally, the working conduit includes a cylindrical pipe connected to the right-side chamber and a stepped pipe screwed to the right end of the cylindrical pipe.

[0016] Optionally, the power source is a pneumatic source and a hydraulic source arranged in parallel.

[0017] Optionally, the high-precision multi-module dynamic simulation test device for coal and gas outbursts also includes a cleaning robotic arm, the free end of which is equipped with a nozzle. The cleaning robotic arm is connected to the bottom of the pallet and is used to extend into the right chamber for high-pressure flushing.

[0018] Optionally, the cleaning robotic arm includes multiple moving sections connected in sequence. Each moving section includes a telescopic component and a rotating component connected to the telescopic component. The telescopic component of the innermost moving section is connected to the bottom of the pallet, and the rotating component of the outermost moving section is equipped with the nozzle.

[0019] The technical solution provided by this invention has the following advantages compared with the prior art:

[0020] The high-precision multi-module dynamic simulation test device for coal and gas outbursts provided by this invention fills the left chamber with pulverized coal and transfers it to the middle chamber through an opening and closing gate. Coal blocks are filled into the right chamber. Then, a crustal simulation component simulates actual ground stress, and a gas simulation component simulates actual gas pressure. The crustal and gas simulation components work together to generate an outburst. Finally, an outburst monitoring component records the state changes of the coal blocks during the outburst and the dynamic process of the outburst, thus comprehensively simulating coal and gas outburst phenomena. Simultaneously, this device, through a data analysis processor, can acquire multi-dimensional data on mechanics, chemistry, and morphology during the outburst process in real time, ensuring simulation accuracy and providing comprehensive data support for disaster prevention and control research. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the dynamic simulation test device in an embodiment of the present invention;

[0024] Figure 2 This diagram illustrates the control logic of the dynamic simulation test device in this embodiment of the invention.

[0025] In the picture:

[0026] 100. Cavity assembly; 110. Left side chamber; 111. Filling port; 112. Discharge ramp; 113. Gas extraction port; 120. Intermediate chamber; 121. Temperature sensor; 130. Right side chamber; 140. Opening and closing gate; 150. Support plate; 160. Working pipeline; 161. Cylindrical pipe; 162. Stepped pipe;

[0027] 200. Crustal simulation component; 210. Power source; 211. Gas source; 212. Hydraulic source; 220. Solenoid valve; 230. Piston; 240. Pressure waveform generator; 250. Pressure controller; 260. Accelerometer; 270. Piezoelectric crystal sensor;

[0028] 300. Gas simulation component; 310. Gas container; 320. Outlet valve; 330. Connecting pipe; 340. Gas controller; 350. Gas sensor;

[0029] 400. Highlighted monitoring components; 410. Mounting plate; 420. Strain sensor; 430. Micro-vibration sensor; 440. 3D laser scanner; 450. High-speed camera;

[0030] 500. Cleaning robotic arm; 510. Nozzle; 520. Telescopic component; 530. Rotating component. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0032] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0034] The following is combined Figure 1 and Figure 2 Specific embodiments of the present invention will be described in detail below.

[0035] This embodiment provides a high-precision multi-module dynamic simulation test device for coal and gas outbursts, including a cavity component 100, a crustal simulation component 200, a gas simulation component 300, an outburst monitoring component 400, and a data analysis processor.

[0036] The cavity assembly 100 includes a left cavity 110, a middle cavity 120 and a right cavity 130. The top of the left cavity 110 is provided with a filling port 111. The middle cavity 120 is connected to both side cavities and is provided with an opening and closing gate 140 between it and the left cavity 110. The bottom of the right cavity 130 is provided with a horizontal push-pull type support plate 150. The right side of the right cavity 130 is equipped with a working pipe 160.

[0037] During the test: Coal powder is filled into the left chamber 110 through the filling port 111. The coal powder, together with the crustal simulation component 200 and the gas simulation component 300, is used to simulate the actual crust. Coal blocks are inserted into the right chamber 130 from below through the push-pull plate 150. The coal blocks are used to simulate the actual coal and rock.

[0038] Specifically, the intermediate chamber 120, the left chamber 110, and the right chamber 130 are all independently provided. The intermediate chamber 120 is connected to the two side chambers via flanges, which facilitates processing and maintenance. Of course, in other embodiments, the intermediate chamber 120, the left chamber 110, and the right chamber 130 can also be formed into an integral structure by welding or other methods.

[0039] Specifically, the gate 140 is an electrically controlled valve, which can be opened and closed by the operator through button operation, making operation more convenient. Of course, in other embodiments, the gate 140 can also be a manual valve, as long as it can be opened and closed.

[0040] Specifically, the working conduit 160 includes a cylindrical pipe 161 connected to the right chamber 130 and a stepped pipe 162 screwed to the right end of the cylindrical pipe 161. By connecting stepped pipes 162 of different sizes to the right side of the cylindrical pipe 161, the diameter of the protruding pipe opening can be adjusted, thereby simulating the working conditions of nozzles with different orifice diameters.

[0041] Furthermore, in this embodiment, a discharge ramp 112 is provided in the left chamber 110. The discharge ramp 112 is used to guide the pulverized coal through the opening and closing gate 140 into the intermediate chamber 120. That is, the right side of the discharge ramp 112 is inclined downward to align with the opening and closing gate 140, so that after the opening and closing gate 140 is opened, the pulverized coal can automatically fall into the intermediate chamber 120 under the action of gravity.

[0042] Furthermore, in this embodiment, a gas extraction port 113 is provided at the top of the left chamber 110. After the test is completed, the opening and closing gate 140 is opened, and the residual gas in the device can be extracted through the gas extraction port 113 to avoid gas accumulation and potential safety hazards.

[0043] The crustal simulation component 200 includes a power source 210, a solenoid valve 220, and a piston 230 connected in sequence. The solenoid valve 220 is connected in sequence to a pressure waveform generator 240 and a pressure controller 250. The piston 230 is installed in the intermediate chamber 120. An acceleration sensor 260 and a piezoelectric crystal sensor 270 are installed on the lower surface of the piston 230. The acceleration sensor 260 is used to collect the motion state of the piston 230, and the piezoelectric crystal sensor 270 is used to collect the pressure state of the coal powder in the intermediate chamber 120. The pressure controller 250 is used to control the operation of the pressure waveform generator 240 based on the collected values ​​of the acceleration sensor 260 and the piezoelectric crystal sensor 270.

[0044] During the test, the controller generates waveform parameters and sends them to the pressure waveform generator 240. The pressure waveform generator 240 generates a customized pressure waveform and sends it to the solenoid valve 220. The solenoid valve 220 controls the opening and closing degree according to the customized pressure waveform, thereby realizing the pressure regulation applied to the piston 230, and thus realizing the regulation of the pressure on the pulverized coal in the intermediate chamber 120. The acceleration sensor 260 collects the real-time motion state signal of the piston 230, and the piezoelectric crystal sensor 270 collects the real-time pressure state signal of the pulverized coal in the intermediate chamber 120. The controller receives the real-time motion state signal and the real-time pressure state signal and combines them with the preset value to perform feedback regulation on the pressure waveform generator 240 until the actual value is consistent with the preset value.

[0045] Specifically, the power source 210 consists of a pneumatic source 211 and a hydraulic source 212 arranged in parallel. Depending on the test requirements, either the pneumatic source 211 or the hydraulic source 212 can be selected as the power source 210, providing greater flexibility. Of course, in other embodiments, the power source 210 may also consist of only the pneumatic source 211 or the hydraulic source 212.

[0046] It should be noted that the solenoid valve 220 is connected in sequence to the pressure waveform generator 240 and the pressure controller 250. The purpose of this is to generate a controllable pressure wave to disturb the pulverized coal. The pressure controller 250 is fed back by the acceleration sensor 260 and the piezoelectric crystal sensor 270, which can form a closed-loop control system, thereby realizing dynamic optimization and stable loading of the pressure waveform, and thus improving the test accuracy.

[0047] The gas simulation component 300 includes a gas container 310, which is equipped with an outlet valve 320. The outlet valve 320 is connected to the bottom of the intermediate chamber 120 through a connecting pipe 330. The gas simulation component 300 also includes a gas controller 340 and a gas sensor 350 located in the intermediate chamber 120. The gas controller 340 is used to control the operation of the outlet valve 320 based on the collected values ​​from the gas sensor 350.

[0048] During the test, gas container 310 injects gas into intermediate chamber 120, and the gas concentration in intermediate chamber 120 gradually increases. When the gas concentration reaches the preset value, gas controller 340 drives outlet valve 320 to close, thus achieving precise control of gas concentration in intermediate chamber 120.

[0049] It is easy to understand that before an outburst occurs, a closed space is formed in the intermediate chamber 120, so the gas concentration is positively correlated with the gas pressure, that is, the gas concentration can reflect the gas pressure indirectly.

[0050] It should be noted that since the intermediate chamber 120 is filled with coal powder, a filter screen should be added between the connecting pipe 330 and the bottom of the intermediate chamber 120. This filter screen only allows gas to pass through and does not allow coal powder to pass through.

[0051] The outburst monitoring component 400 includes a mounting plate 410 located on the top of the right chamber 130, and a strain sensor 420 and a micro-vibration sensor 430 mounted on the mounting plate 410. The outburst monitoring component 400 also includes a three-dimensional laser scanner 440 and a high-speed camera 450. The three-dimensional laser scanner 440 is used to scan the real-time status of the coal block in the right chamber 130, and the high-speed camera 450 is used to capture the dynamic process of the outburst occurring at the working pipe 160.

[0052] During the test, the push-pull plate 150 opens the bottom of the right chamber 130, and then a coal block that matches the size of the right chamber 130 is inserted into the right chamber 130 from the bottom opening until the coal block contacts the mounting plate 410. Finally, the push-pull plate 150 closes the bottom of the right chamber 130. The three-dimensional laser scanner 440 can construct a dynamic three-dimensional model of the coal block breaking, and the high-speed camera 450 can record the dynamic process of the coal block breaking.

[0053] It should be noted that the 3D laser scanner 440 and the high-speed camera 450 can be independently fixed by a bracket, or they can be fixed to a fixed structure such as the right-side chamber 130 or the working pipe 160.

[0054] The data analysis processor is connected to the piezoelectric crystal sensor 270, gas sensor 350, strain sensor 420, micro-vibration sensor 430, 3D laser scanner 440, and high-speed camera 450.

[0055] It is easy to understand that the piezoelectric crystal sensor 270 can collect the pressure of coal powder in the intermediate chamber 120, the gas sensor 350 can collect the gas concentration in the intermediate chamber 120, the strain sensor 420 can collect the strain of coal in the right chamber 130, the micro-vibration sensor 430 can collect the vibration of coal in the right chamber 130, the three-dimensional laser scanner 440 can collect the dynamic three-dimensional model of coal rupture in the right chamber 130, and the high-speed camera 450 can collect the dynamic process of outburst occurring at the working pipeline 160. These collected signals are aggregated to the data analysis processor to monitor the changes of various parameters before and after the outburst in real time, thereby providing rich data support for in-depth analysis of the outburst mechanism.

[0056] Furthermore, this embodiment also includes a temperature sensor 121 within the intermediate chamber 120, which is communicatively connected to a data analysis processor. The temperature sensor 121 can collect the temperature of the pulverized coal within the intermediate chamber 120, thereby providing data support for research on the relationship between pulverized coal and temperature.

[0057] In addition, the high-precision multi-module coal and gas outburst dynamic simulation test device of this embodiment is also equipped with a cleaning robotic arm 500. The free end of the cleaning robotic arm 500 is equipped with a nozzle 510. The cleaning robotic arm 500 is connected to the bottom of the support plate 150 and is used to extend into the right chamber 130 for high-pressure flushing.

[0058] After the test is completed, the push-pull pallet 150 opens the bottom of the right chamber 130, and the broken coal block falls from the bottom opening. At this time, the nozzle 510 of the cleaning robot arm 500 extends into the right chamber 130 from the bottom opening to perform high-pressure washing on the remaining coal.

[0059] Specifically, the cleaning robotic arm 500 includes multiple sequentially connected motion sections. Each motion section includes a telescopic component 520 and a rotating component 530 connected to the telescopic component 520. The telescopic component of the innermost motion section is connected to the underside of the support plate 150, and the rotating component 530 of the outermost motion section is equipped with a nozzle 510. Each motion section can independently complete telescopic and rotational movements. The multiple motion sections work together to adjust the posture of the cleaning robotic arm 500, thereby adjusting the position and orientation of the nozzle 510.

[0060] The working principle of the high-precision multi-module dynamic simulation test device for coal and gas outbursts in this embodiment is as follows:

[0061] 1) Coal loading:

[0062] First, coal powder is filled into the left chamber 110 through the filling port 111. Then, coal blocks are pushed into the right chamber 130 through the push-pull plate 150. Finally, the opening and closing gate 140 is opened to transfer the coal powder from the left chamber 110 to the middle chamber 120. Then the opening and closing gate 140 is closed.

[0063] 2) Gas injection:

[0064] Open the gas container 310 and inject gas into the intermediate chamber 120 through the gas controller 340 until the gas concentration in the intermediate chamber 120 reaches the preset value;

[0065] 3) Pressure loading:

[0066] Turn on the power source 210 and apply a preset pressure to the piston 230 through the pressure controller 250;

[0067] 4) Mechanical damage:

[0068] Select a stepped pipe 162 with a suitable diameter, and then insert the drill rod into the coal block after passing through the stepped pipe 162 and the cylindrical pipe 161 in sequence, and drill. When the drilling reaches a certain position in the coal block and causes the balance on both sides of the coal block to be broken, a coal and gas outburst phenomenon occurs.

[0069] 5) Data Acquisition:

[0070] Piezoelectric crystal sensor 270 collects the pressure of coal powder in the intermediate chamber 120, gas sensor 350 collects the gas concentration in the intermediate chamber 120, temperature sensor 121 collects the temperature of the intermediate chamber 120, strain sensor 420 collects the strain of coal in the right chamber 130, micro-vibration sensor 430 collects the vibration of coal in the right chamber 130, 3D laser scanner 440 collects the dynamic 3D model of coal rupture in the right chamber 130, and high-speed camera 450 collects the dynamic process of outburst occurring at the working pipeline 160. These collected signals are aggregated to a data analysis processor to monitor the changes of various parameters before and after the outburst in real time.

[0071] 6) Cleaning and Resetting:

[0072] Open the gate 140 and connect the gas extraction port 113 to the negative pressure device to remove the residual gas in the device; the coal powder in the intermediate chamber 120 is reserved for the next use; open the pallet 150 to allow the broken coal block in the right chamber 130 to fall out, and then use the cleaning robot arm 500 to perform high-pressure washing on the remaining coal body.

[0073] The above are merely specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A high-precision multi-module dynamic simulation test device for coal and gas outbursts, characterized in that, include: The cavity assembly (100) includes a left chamber (110), a middle chamber (120) and a right chamber (130). The top of the left chamber (110) is provided with a packing port (111). The middle chamber (120) is connected to both chambers and is provided with an opening and closing gate (140) between it and the left chamber (110). The bottom of the right chamber (130) is provided with a horizontal push-pull type support plate (150). A working pipe (160) is installed on the right side of the right chamber (130). The crustal simulation component (200) includes a power source (210), a solenoid valve (220), and a piston (230) connected in sequence. The solenoid valve (220) is connected in sequence to a pressure waveform generator (240) and a pressure controller (250). The piston (230) is installed in the intermediate chamber (120). An accelerometer (260) and a piezoelectric crystal sensor (270) are installed on the lower surface of the piston (230). The accelerometer (260) is used to collect the motion state of the piston (230), and the piezoelectric crystal sensor (270) is used to collect the pressure state of the coal powder in the intermediate chamber (120). The pressure controller (250) is used to control the operation of the pressure waveform generator (240) based on the collected values ​​of the accelerometer (260) and the piezoelectric crystal sensor (270). A gas simulation assembly (300) includes a gas container (310) with an outlet valve (320) connected to the bottom of an intermediate chamber (120) via a connecting pipe (330). The gas simulation assembly (300) also includes a gas controller (340) and a gas sensor (350) located in the intermediate chamber (120). The gas controller (340) is used to control the outlet valve (320) based on the collected values ​​from the gas sensor (350). The outburst monitoring component (400) includes a mounting plate (410) located on the top of the right chamber (130) and a strain sensor (420) and a micro-vibration sensor (430) disposed on the mounting plate (410). The outburst monitoring component (400) also includes a three-dimensional laser scanner (440) and a high-speed camera (450). The three-dimensional laser scanner (440) is used to scan the real-time status of the coal block in the right chamber (130), and the high-speed camera (450) is used to capture the outburst dynamic process occurring at the working pipe (160). The data analysis processor is communicatively connected to the piezoelectric crystal sensor (270), gas sensor (350), strain sensor (420), micro-vibration sensor (430), 3D laser scanner (440), and high-speed camera (450).

2. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to claim 1, characterized in that, The left chamber (110) is provided with a discharge ramp (112), which is used to guide pulverized coal through the opening and closing gate (140) into the intermediate chamber (120).

3. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to claim 1, characterized in that, The top of the left chamber (110) is provided with a gas extraction port (113).

4. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to claim 1, characterized in that, The intermediate chamber (120) is also equipped with a temperature sensor (121), which is communicatively connected to the data analysis processor.

5. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to claim 1, characterized in that, The working pipe (160) includes a cylindrical pipe (161) connected to the right chamber (130) and a stepped pipe (162) screwed to the right end of the cylindrical pipe (161).

6. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to claim 1, characterized in that, The power source (210) consists of a gas source (211) and a hydraulic source (212) arranged in parallel.

7. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to any one of claims 1 to 6, characterized in that, It also includes a cleaning robotic arm (500), the free end of which is provided with a nozzle (510), the cleaning robotic arm (500) is connected to the underside of the pallet (150) and is used to extend into the right side chamber (130) for high-pressure rinsing.

8. The high-precision multi-module dynamic simulation test device for coal and gas outbursts according to claim 7, characterized in that, The cleaning robotic arm (500) includes multiple moving sections connected in sequence. Each moving section includes a telescopic member (520) and a rotating member (530) connected to the telescopic member (520). The telescopic member of the innermost moving section is connected to the bottom of the pallet (150), and the rotating member (530) of the outermost moving section is equipped with the nozzle (510).

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