Simulation ventilation experiment model and method for dust production and gas migration during excavation of tunneling roadway

Abstract

The invention relates to the related technical field of coal mine disaster evolution process simulation tests, and provides a tunneling roadway excavation dust production and gas migration simulation ventilation experiment model which comprises a supporting base, a model frame, a gas supply assembly, an excavation assembly, a monitoring assembly and a ventilation assembly. The tunnel excavation dust production and gas migration simulation ventilation experiment method comprises the following steps: S1, arranging a simulation coal seam model; s2, the rotary cutter is started; methane gas is conveyed, and a fan is started; s3, monitoring and recording methane concentration and dust concentration; shooting a dust space distribution picture; s4, reconstructing a dangerous area of the gas and dust composite disaster coupled by the dust concentration field and the methane explosion concentration field; constructing a prediction model; s5, performing chaos prediction; reconstructing a next-stage dangerous area; the dust generation mode in the simulated coal seam is matched with the actual tunneling working condition of the mine; the whole process that the gas synchronously escapes from the coal body crushing surface and is coupled and diffused with the surface source dust is reproduced; and simulation of dust production and gas migration in complex working conditions is realized.

Description

Technical Field

[0001] This invention relates to the technical field of simulation experiments on the evolution of coal mine disasters, and in particular to an experimental model and method for simulating ventilation of dust and gas transport during tunneling. Background Technology

[0002] Gas and dust combined hazards are the most common and highly destructive major safety hazards in coal mine production, seriously threatening the underground working environment and the lives of personnel. Suspended dust generated during operations, once reaching a certain concentration, poses an explosion risk. When mixed with underground gas, the presence of gas significantly reduces the minimum ignition energy of the dust cloud and expands its explosive concentration range. Once ignited, the combined explosion of gas and dust will generate higher explosion pressure, flame temperature, and propagation speed, with destructive power far exceeding that of a single hazard. It is also highly likely to trigger a series of secondary explosions, creating a vicious cycle.

[0003] With increasing mining depth and intensity, the underground environment exhibits the "three highs" characteristics: high ground stress, high gas content, and high dust concentration. High ground stress leads to intensified coal and rock mass fracturing and a significant increase in dust production; high gas emissions provide a more ignitable atmosphere for dust explosions, making the risk of combined gas and dust hazards in mining faces, return airways, and other areas increasingly prominent. Furthermore, the complexity, concealment, dynamic nature, and coupling of combined gas and dust hazards make research into their hazard-causing conditions, triggering mechanisms, and the entire process of hazard evolution extremely difficult.

[0004] Currently, the occurrence, evolution, and expansion of gas and dust combined disasters are mainly studied through theoretical analysis, numerical simulation, and field tests. However, there is a lack of relevant theories on the evolution and disaster-causing mechanisms of gas and dust combined disasters, as well as research and analysis on the spatial characteristics of their hazardous areas. Summary of the Invention

[0005] This invention aims to provide a simulation ventilation experimental model and method for dust generation and gas migration in tunneling roadways. It can simulate the transformation of dust generation in coal seams from traditional point source dispersion to surface source release in real time, reproduce the entire process of gas synchronously escaping from the broken coal face and coupling with surface source dust, realize an integrated simulation test of the evolution process of gas and dust composite disasters, and effectively improve experimental efficiency and the accuracy of experimental data.

[0006] Therefore, the technical solution adopted by the present invention is as follows: a simulated ventilation experimental model for dust generation and gas transport in tunneling roadways, including a support base and a model frame set on the support base. The model frame is equipped with a gas supply component, a mining component, a monitoring component and a ventilation component. The support base includes at least three sets of retractable support legs arranged at intervals. The tilt angle of the base can be adjusted by adjusting each retractable support leg.

[0007] The gas supply assembly includes a methane cylinder connected to the model frame via an air inlet pipe. A solenoid valve and an electromagnetic flow meter are sequentially installed between the methane cylinder and the air inlet pipe. The outlet end of the air inlet pipe is connected to the model frame via multiple one-way pneumatic valves.

[0008] The mining component includes a rotary cutting machine set inside a model frame, and the model frame is provided with a three-way moving mechanism for the rotary cutting machine to move in three directions within the model frame.

[0009] The monitoring components include a wind speed sensor, a methane concentration sensor, and a dust sensor arranged sequentially and at intervals on the upper right side of the model frame; one wind speed sensor, one methane concentration sensor, and one dust sensor constitute a monitoring module. Multiple monitoring modules are arranged on the right side of the model frame. The monitoring components also include a high-speed camera and a conveyor belt arranged on the right side of the model frame. The high-speed camera can move back and forth between multiple monitoring modules via the conveyor belt to continuously capture photos of the spatial distribution of dust.

[0010] The ventilation assembly includes a duct and a fan, and the model frame is provided with a duct slide rail for adjusting the position of the duct.

[0011] As a preferred embodiment of the above solution, the model frame is made of high-strength acrylic sheet, the joints are sealed with glass glue, and the top plate of the model frame is opened and closed using automatic hinges.

[0012] More preferably, the number of one-way pneumatic valves is nine, which are distributed in a 3x3 grid at the air inlet end of the model frame, and the air inlet pipe is connected to an air inlet branch pipe that matches the one-way pneumatic valve.

[0013] More preferably, the veneer is a toothed veneer, the toothed blades being rectangular fan-blade structures made of medium carbon alloy steel, with protruding particles made of diamond composite sheets inlaid on the toothed blades.

[0014] More preferably, the three-way moving mechanism includes a transverse slide rail arranged transversely within the model frame, a longitudinal slide rail arranged on the transverse slide rail, and a vertical slide rail arranged on the longitudinal slide rail. The transverse slide rail, the longitudinal slide rail, and the vertical slide rail are each provided with a corresponding drive motor and a moving component connected to the drive motor. The base of the transverse slide rail is located at the bottom of the model frame, the base of the longitudinal slide rail is located on the moving component of the transverse slide rail, the base of the vertical slide rail is located on the moving component of the longitudinal slide rail, and the veneer is located on the moving component of the vertical slide rail.

[0015] More preferably, the air duct slide rail includes multiple channel steels horizontally spaced at the top of the model frame, sliders matching the channel steels, and steel wire ropes connected through the sliders. The lower end of the steel wire rope is connected to the air duct, and the fan is connected to the air duct. A limit plate is provided on the slider to fix the slider at a certain position on the channel steel. A roller is provided on the slider, and the length of the steel wire rope is adjusted by rotating the roller, thereby adjusting the height of the air duct.

[0016] More preferably, the wind speed sensor, methane concentration sensor, and dust sensor are all connected to the same signal receiving module, and the signal receiving module is also connected to the solenoid valve, electromagnetic flow meter, and three-way moving mechanism. The signal receiving module is also connected to a control processing module.

[0017] A method for simulating ventilation experiments on dust generation and gas transport in tunnel excavation includes the following steps:

[0018] S1. Arrange a simulated coal seam model similar to the tunneling face at the air intake end of the model frame and seal it. Install the remaining parts of the model frame and adjust the height of the telescopic outriggers and the position of the ventilation duct according to the simulated working conditions.

[0019] S2. Start the rotary cutting machine and simulate mining at the preset speed. At the same time, methane gas of a set concentration is delivered into the model frame through the methane cylinder. At the same time, the fan is started at the preset wind speed. The wind speed sensor monitors and adjusts the wind speed of the fan. The air duct is filled or drawn in by the fan, so that the dust and methane are mixed and diffused along the longitudinal direction.

[0020] S3. Multiple sets of methane concentration sensors and dust concentration sensors monitor the methane and dust concentrations at different locations and transmit the data to the signal receiving module. The control processing module, which is electrically connected to the signal receiving module, processes the data and records the methane and dust concentrations at different times and locations under different wind speeds, thus obtaining the methane concentration data and dust concentration changes at the corresponding locations. At the same time, a high-speed camera moves back and forth between the multiple monitoring modules via a conveyor belt and continuously takes pictures of the spatial distribution of dust.

[0021] S4. Based on the obtained dust concentration data and methane concentration data, and considering the conditions for the occurrence of gas and dust combined disasters, contour maps are drawn using Origin software, and spatial interpolation is performed using Matlab software to reconstruct the dangerous area of ​​gas and dust combined disasters coupled with dust concentration fields and methane explosion concentration fields; at the same time, dust spatial distribution photos taken by high-speed cameras are used to construct an initial model for predicting dust concentration in tunneling roadways based on deep machine learning, and the model for predicting dust concentration in tunneling roadways is trained.

[0022] S5. The nonlinear modeling method of phase space reconstruction is used to make chaotic predictions of the methane and dust concentration data at the measuring point at the next moment; the obtained dust concentration prediction model of the tunnel is used to predict the dust concentration of the tunnel, and then the dangerous area of ​​gas and dust combined disaster in the next stage of tunneling is reconstructed.

[0023] The beneficial effects of this invention are as follows: By setting up a simulated coal seam in the model framework and mining while introducing methane gas, the transformation of dust generation in the coal seam from traditional point source dispersion to surface source release can be simulated in real time, which is consistent with the actual tunneling conditions in the mine; at the same time, the entire process of gas synchronously escaping from the broken surface of the coal body and coupling with surface source dust can be reproduced, realizing an integrated simulation test of the evolution process of gas and dust composite disasters;

[0024] The model frame is equipped with retractable outriggers to adjust its height and tilt, which can simulate the dust and gas migration in inclined underground roadways in actual working conditions. The rotary cutter is also set on a three-way moving mechanism, which can simulate dust and gas migration in complex working conditions. The rotary cutter can be adjusted to cut left and right, up and down, or drill forward, which improves the accuracy of the simulation device.

[0025] By installing the ventilation duct on the slide rail and adjusting its position in both the horizontal and vertical directions, and by continuously taking photos of the dust distribution in the space by moving a high-speed camera back and forth, the working conditions in the tunnel can be detected and the migration patterns of the simulated medium can be analyzed. This can effectively improve experimental efficiency and the accuracy of experimental data. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a flowchart of the present invention.

[0028] Figure 3 This is a flowchart of the machine learning prediction model in this invention. Detailed Implementation

[0029] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0030] like Figures 1-3 As shown, a simulated ventilation experimental model for dust generation and gas transport in tunneling includes a support base and a model frame 1 set on the support base. The model frame 1 is equipped with an air supply component, a mining component, a monitoring component, and a ventilation component. The support base includes at least three sets of retractable support legs 2 arranged at intervals. The tilt angle of the base can be adjusted by adjusting each retractable support leg 2.

[0031] The gas supply assembly includes a methane cylinder 3 connected to the model frame 1 via an air inlet pipe. A solenoid valve 4 and an electromagnetic flow meter 5 are sequentially installed between the methane cylinder 3 and the air inlet pipe. The outlet end of the air inlet pipe is connected to the model frame 1 via multiple one-way pneumatic valves 6. There are nine one-way pneumatic valves 6, which are distributed in a 3x3 grid pattern at the air inlet end of the model frame 1. An air inlet branch pipe that matches the one-way pneumatic valves 6 is connected to the air inlet pipe.

[0032] The methane concentration within model frame 1 is adjusted by the gas supply component to simulate different operating conditions. Multiple branch pipes are connected to the intake pipe and distributed in a 3x3 grid on model frame 1 to ensure that the methane gas entering model frame 1 is evenly distributed.

[0033] The mining component includes a rotary cutting machine 7 installed within a model frame 1. The model frame 1 is equipped with a three-way moving mechanism for the rotary cutting machine 7 to move in three directions within the model frame 1. The three-way moving mechanism includes a transverse slide rail installed transversely within the model frame 1, a longitudinal slide rail installed on the transverse slide rail, and a vertical slide rail installed on the longitudinal slide rail. The transverse slide rail, longitudinal slide rail, and vertical slide rail are each equipped with a corresponding drive motor and a moving component connected to the drive motor. The base of the transverse slide rail is installed at the bottom of the model frame 1, the base of the longitudinal slide rail is installed on the moving component of the transverse slide rail, the base of the vertical slide rail is installed on the moving component of the longitudinal slide rail, and the rotary cutting machine 7 is installed on the moving component of the vertical slide rail.

[0034] The transverse, longitudinal, and vertical slide rails are each equipped with a drive motor. The rotation of a threaded rod located at the output end of the drive motor drives a moving component threaded onto the threaded rod, forming a screw-nut structure to enable movement of the veneer 7 in all directions. The position of the veneer 7 can be adjusted via a three-way movement mechanism, and the mode of the veneer 7 can be adjusted, including drilling mode (forward / backward movement) or cutting mode (up / down or left / right movement), facilitating the simulation of different working conditions.

[0035] In this application, the three-way moving mechanism can also be arranged with grid-like slide rails according to the coal seam conditions, and moving parts can be set on the slide rails to realize the horizontal and vertical movement adjustment. Lifting cylinders or motors can be set on the moving parts to drive the lifting of the rotary cutter 7, thereby realizing the three-way movement of the rotary cutter 7 and the adjustment of the drilling mode or cutting mode.

[0036] The monitoring components include a wind speed sensor 8, a methane concentration sensor 9, and a dust sensor 10, which are sequentially and spaced apart on the upper right side of the model frame 1. Each wind speed sensor 8, methane concentration sensor 9, and dust sensor 10 constitutes a monitoring module. Multiple monitoring modules are arranged on the right side of the model frame 1. The monitoring components also include a high-speed camera 11 and a conveyor belt 12 arranged on the right side of the model frame 1. The high-speed camera 11 can move back and forth between multiple monitoring modules via the conveyor belt 12 to continuously capture images of the spatial distribution of dust. The corresponding values ​​are detected by the wind speed sensor 8, methane concentration sensor 9, and dust sensor 10 and transmitted to the control processing module. By setting up multiple monitoring modules, coverage detection within the working range can be achieved. The high-speed camera 11 continuously captures images of the dust distribution, which facilitates the reconstruction of the dangerous areas of gas and dust combined hazards in the next stage of tunneling.

[0037] The conveyor belt 12 drives the high-speed camera 11 to move between multiple monitoring modules, thereby capturing the methane concentration value and dust distribution under the corresponding wind speed conditions during the corresponding time period.

[0038] The ventilation assembly includes a duct 13 and a fan 14. A duct slide rail 15 for adjusting the position of the duct 13 is installed within the model frame 1. The duct slide rail 15 includes multiple channel steels horizontally spaced at intervals on the top of the model frame 1, sliders matching the channel steels, and steel wire ropes connected to the sliders. The lower end of the steel wire rope is connected to the duct 13, and the fan 14 is connected to the duct 13. The position of the duct 13 is adjusted left and right by moving the sliders left and right within the channel steels, and the height of the duct 13 is adjusted by the length of the steel wire rope connected to the sliders. The sliders are shaped to match the channel steels and have limit plates to fix them in a specific position on the channel steels. Rollers are installed on the sliders, and the length of the steel wire rope is adjusted by rotating the rollers, thereby adjusting the height of the duct 13. The top plate is opened by an automatic hinge, and the position of the sliders on the channel steels and the length of the steel wire rope are adjusted to change the position of the duct. During the experiment, the type of fan 14 is adjusted according to requirements, using both forced-in and extraction fans to adapt to different working conditions and simulation needs.

[0039] Model frame 1 is made of high-strength acrylic sheet, and the seams are sealed with glass glue. The top plate of model frame 1 is opened and closed by automatic hinges.

[0040] The veneer lathe 7 adopts a toothed blade type veneer lathe. Its toothed blade is made of medium carbon alloy steel with a rectangular imitation fan blade structure. The toothed blade is inlaid with diamond composite sheet protrusions to ensure the strength of the toothed blade.

[0041] The wind speed sensor 8, methane concentration sensor 9, and dust sensor 10 are all connected to the same signal receiving module. The signal receiving module is also connected to the solenoid valve 4, electromagnetic flow meter 5, and three-way moving mechanism. The signal receiving module is connected to a control processing module.

[0042] A method for simulating ventilation experiments on dust generation and gas transport in tunnel excavation includes the following steps:

[0043] S1. Arrange a simulated coal seam model similar to the tunneling face at the air intake end of the model frame 1 and seal it. Install the remaining components of the model frame 1 and adjust the height of the telescopic outriggers and the position of the ventilation duct according to the simulated working conditions.

[0044] S2. Start the rotary cutting machine 7 and simulate mining at the preset speed. At the same time, methane gas of a set concentration is transported into the model frame 1 through the methane cylinder 3. At the same time, the blower 14 is started at the preset wind speed. The wind speed sensor 8 monitors and adjusts the wind speed of the blower 14. The air duct 13 is inlet or drawn in through the blower 14, so that the dust and methane are mixed and moved and diffused along the longitudinal direction.

[0045] S3. Multiple sets of methane concentration sensors 9 and dust concentration sensors monitor the methane and dust concentrations at different locations and transmit the data to the signal receiving module. The control processing module, which is electrically connected to the signal receiving module, processes the data and records the methane and dust concentrations at different times and locations under different wind speeds, thus obtaining the methane concentration data and dust concentration changes at the corresponding locations. At the same time, the high-speed camera 11 moves back and forth between the multiple monitoring modules via the conveyor belt 12 and continuously takes pictures of the spatial distribution of dust.

[0046] S4. Based on the obtained dust concentration data and methane concentration data, and considering the conditions for the occurrence of gas and dust combined disasters, contour maps are drawn using Origin software, and spatial interpolation is performed using Matlab software to reconstruct the dangerous area of ​​gas and dust combined disasters coupled with dust concentration fields and methane explosion concentration fields; at the same time, dust spatial distribution photos taken by high-speed camera 11 are used to construct an initial model for predicting dust concentration in tunneling roadways based on deep machine learning and train the model to obtain the dust concentration prediction model for tunneling roadways.

[0047] S5. The nonlinear modeling method of phase space reconstruction is used to make chaotic predictions of the methane and dust concentration data at the measuring point at the next moment; the obtained dust concentration prediction model of the tunnel is used to predict the dust concentration of the tunnel, and then the dangerous area of ​​gas and dust combined disaster in the next stage of tunneling is reconstructed.

[0048] In model framework 1, a simulated coal seam is set up, and mining is carried out while methane gas is introduced. The transformation of dust generation in the coal seam from traditional point source throwing to surface source release is simulated in real time, which is consistent with the actual tunneling conditions in the mine. At the same time, the whole process of gas synchronously escaping from the broken surface of the coal body and coupling with surface dust can be reproduced, realizing an integrated simulation test of the evolution process of gas and dust composite disasters.

[0049] The model frame 1 is equipped with retractable outriggers to adjust its height and tilt, which can simulate the dust generation and gas migration in the inclined roadway in the actual working conditions. The rotary cutter 7 is set on the three-way moving mechanism, which can realize the simulation of dust generation and gas migration in complex working conditions and improve the accuracy of the simulation device.

[0050] By installing the ventilation duct 13 on the slide rail and adjusting its position in the horizontal and vertical directions, and by continuously taking pictures of the dust distribution in the space by moving the high-speed camera 11 back and forth, the working conditions in the tunnel can be detected and the migration law of the simulated medium can be analyzed, which can effectively improve the experimental efficiency and the accuracy of the experimental data.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A simulation ventilation experimental model for dust generation and gas transport in tunneling roadways, characterized in that: It includes a support base and a model frame (1) set on the support base. The model frame (1) is equipped with a gas supply component, a mining component, a monitoring component and a ventilation component. The support base includes at least three sets of telescopic support legs (2) arranged at intervals. The tilt angle of the base can be adjusted by adjusting each telescopic support leg (2). The gas supply assembly includes a methane cylinder (3) connected to the model frame (1) via an air inlet pipe. A solenoid valve (4) and an electromagnetic flow meter (5) are sequentially arranged between the methane cylinder (3) and the air inlet pipe. The outlet end of the air inlet pipe is connected to the model frame (1) via multiple one-way pneumatic valves (6). The mining component includes a rotary cutting machine (7) set inside the model frame (1), and the model frame (1) is provided with a three-way moving mechanism for the rotary cutting machine (7) to move in three directions within the model frame (1); The monitoring components include a wind speed sensor (8), a methane concentration sensor (9), and a dust sensor (10) arranged sequentially and at intervals on the upper right side of the model frame (1); one wind speed sensor (8), one methane concentration sensor (9), and one dust sensor (10) constitute a monitoring module. Multiple monitoring modules are arranged on the right side of the model frame (1). The monitoring components also include a high-speed camera (11) and a conveyor belt (12) arranged on the right side of the model frame (1). The high-speed camera (11) can move back and forth between multiple monitoring modules via the conveyor belt (12) to continuously capture photos of the spatial distribution of dust. The ventilation assembly includes a duct (13) and a fan (14), and the model frame (1) is provided with a duct slide rail (15) for adjusting the position of the duct (13).

2. The simulation ventilation experimental model for dust generation and gas transport in tunnel excavation as described in claim 1, characterized in that: The model frame (1) is made of high-strength acrylic sheet, and the joints are sealed with glass glue. The top plate of the model frame (1) is opened and closed by automatic hinges.

3. The simulated ventilation experimental model for dust generation and gas transport in tunnel excavation as described in claim 1, characterized in that: There are nine one-way pneumatic valves (6), which are distributed in a 3x3 grid at the air inlet end of the model frame (1). The air inlet pipe is connected to an air inlet branch pipe that matches the one-way pneumatic valve (6).

4. The simulated ventilation experimental model for dust generation and gas transport in tunnel excavation as described in claim 1, characterized in that: The rotary cutter (7) is a toothed rotary cutter. Its toothed blades are made of medium carbon alloy steel in a rectangular imitation fan blade structure, and the toothed blades are inlaid with protruding particles made of diamond composite sheets.

5. The simulation ventilation experimental model for dust generation and gas transport in tunneling as described in claim 1, characterized in that: The three-way moving mechanism includes a transverse slide rail arranged in the model frame (1), a longitudinal slide rail arranged on the transverse slide rail, and a vertical slide rail arranged on the longitudinal slide rail. The transverse slide rail, the longitudinal slide rail, and the vertical slide rail are respectively provided with corresponding drive motors and moving parts connected to the drive motors. The base of the transverse slide rail is arranged at the bottom of the model frame (1), the base of the longitudinal slide rail is arranged on the moving part of the transverse slide rail, the base of the vertical slide rail is arranged on the moving part of the longitudinal slide rail, and the veneer (7) is arranged on the moving part of the vertical slide rail.

6. The simulated ventilation experimental model for dust generation and gas transport in tunneling as described in claim 1, characterized in that: The air duct slide rail (15) includes multiple channel steels arranged horizontally at intervals on the top of the model frame (1), sliders matching the channel steels, and steel wire ropes connected by the sliders. The lower end of the steel wire rope is connected to the air duct (13), and the fan (14) is connected to the air duct (13). The slider is provided with a limit plate, which can fix the slider at a certain position on the channel steel. The slider is provided with a roller, and the length of the steel wire rope is adjusted by rotating the roller, thereby adjusting the height of the air duct (13).

7. The simulation ventilation experimental model for dust generation and gas transport in tunneling as described in claim 1, characterized in that: The wind speed sensor (8), methane concentration sensor (9) and dust sensor (10) are all connected to the same signal receiving module. The signal receiving module is also connected to the solenoid valve (4), electromagnetic flow meter (5) and three-way moving mechanism. The signal receiving module is connected to a control processing module.

8. A method for simulating ventilation of dust and gas transport during tunneling, using the simulation ventilation model for dust and gas transport during tunneling as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Arrange a simulated coal seam model similar to the tunneling face at the air intake end of the model frame (1) and seal it. Install the remaining parts of the model frame (1). Adjust the height of the telescopic outriggers and the position of the ventilation duct (13) according to the simulated working conditions. S2. Start the rotary cutting machine (7) and simulate mining at the preset rotation speed. At the same time, methane gas of a set concentration is transported into the model frame (1) through the methane cylinder (3). At the same time, the blower (14) is started at the preset wind speed. The wind speed of the blower (14) is monitored and adjusted by the wind speed sensor (8). The air duct (13) is inlet or drawn in through the blower (14) so ​​that the dust and methane are mixed and moved and diffused along the longitudinal direction. S3. Multiple sets of methane concentration sensors (9) and dust concentration sensors monitor the methane and dust concentrations at different locations and transmit the data to the signal receiving module. The control processing module, which is electrically connected to the signal receiving module, processes the data and records the methane and dust concentrations at different times and locations under different wind speeds. The data on the methane concentration and dust concentration changes at the corresponding locations are obtained. At the same time, the high-speed camera (11) moves back and forth between multiple monitoring modules via the conveyor belt (12) and continuously takes pictures of the spatial distribution of dust. S4. Based on the obtained dust concentration data and methane concentration data, and based on the conditions for the occurrence of gas and dust combined disasters, use Origin software to draw contour maps, use Matlab software to perform spatial interpolation, and reconstruct the dangerous area of ​​gas and dust combined disasters coupled with dust concentration field and methane explosion concentration field; at the same time, use the dust spatial distribution photos taken by high-speed camera (11) to construct an initial model for predicting dust concentration in tunneling roadways based on deep machine learning and train it to obtain a model for predicting dust concentration in tunneling roadways. S5. The nonlinear modeling method of phase space reconstruction is used to make chaotic predictions of the methane and dust concentration data at the measuring point at the next moment; the obtained dust concentration prediction model of the tunnel is used to predict the dust concentration of the tunnel, and then the dangerous area of ​​gas and dust combined disaster in the next stage of tunneling is reconstructed.

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