Prevention and control method and device for coal face, electronic equipment and storage medium

Abstract

The invention provides a coal face prevention and control method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a first evaluation index of gas emission disaster-causing danger of the coal face; determining a second evaluation index of the natural ignition disaster-causing danger of the coal face; based on the first evaluation index and the second evaluation index, determining a disaster-causing risk comprehensive evaluation index of the coal face; and based on the disaster-causing risk comprehensive evaluation index, determining a target grade of the disaster-causing risk of the coal face, indicating that the coal face is in a dangerous state in response to the target grade, and performing prevention and control on the coal face. According to the scheme, comprehensive risk evaluation is carried out on the coal face, so that the overall disaster prediction and early warning capability of the coal face is improved. Through each rating index of the comprehensive evaluation index, targeted prevention and control are carried out, and multi-disaster cooperative efficient prevention and control of the coal face can be realized.

Description

Technical Field

[0001] The present application relates to the field of coal mine safety technology, and in particular to a prevention and control method, device, electronic equipment and storage medium for a coal mining face. Background Art

[0002] For coal mining faces where gas disasters and spontaneous combustion disasters in goafs coexist, there are respective technical measures for the prevention and control of abnormal gas emission and spontaneous combustion. Since the prevention and control of abnormal gas emission and spontaneous combustion highly overlap in operation time and space, there are mutual constraints and even conflicts between the prevention and control of gas disasters and the prevention and control of spontaneous combustion. It is difficult to achieve efficient and reasonable prevention and control of both disasters at the same time. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first purpose of this application is to propose a prevention and control method for coal mining working faces, so as to achieve coordinated and efficient prevention and control of multiple disasters in coal mining working faces.

[0005] The second purpose of this application is to propose a prevention and control device for a coal mining face.

[0006] The third objective of the present application is to provide an electronic device.

[0007] A fourth objective of the present application is to provide a computer-readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] To achieve the above-mentioned purpose, the first aspect of the embodiment of the present application proposes a prevention and control method for a coal mining face, comprising: monitoring the combustible gas at the coal mining face, determining the first inventory information of the combustible gas at the coal mining face, and based on the first inventory information, determining the first evaluation index of the gas outburst disaster hazard at the coal mining face, wherein the first inventory information at least includes the concentration information and content information of the combustible gas; determining the natural ignition marker gas when spontaneous combustion occurs at the coal mining face, and monitoring the natural ignition marker gas at the coal mining face to determine the natural ignition marker gas The second inventory information of the coal mining face and based on the second inventory information, determine the second evaluation index of the natural combustion disaster hazard of the coal mining face, the second inventory information at least including the concentration information and composition information of the natural combustion marker gas; based on the first evaluation index and the second evaluation index, determine the comprehensive evaluation index of the disaster hazard of the coal mining face; based on the comprehensive evaluation index of the disaster hazard, determine the target level of the disaster hazard of the coal mining face, and in response to the target level indicating that the coal mining face is in a dangerous state, control the coal mining face.

[0010] To achieve the above-mentioned purpose, the second aspect of the embodiment of the present application proposes a prevention and control device for a coal mining face, including: a first determination module, used to monitor the combustible gas at the coal mining face, determine the first inventory information of the combustible gas at the coal mining face, and based on the first inventory information, determine the first evaluation index of the gas outburst disaster hazard of the coal mining face, the first inventory information at least includes the concentration information and content information of the combustible gas; a second determination module, used to determine the natural ignition marker gas when natural ignition occurs at the coal mining face, and monitor the natural ignition marker gas at the coal mining face to determine the natural ignition marker gas A third determination module is used to determine a comprehensive evaluation index for the disaster hazard of spontaneous combustion of the coal mining face based on the first evaluation index and the second evaluation index; a prevention and control module is used to determine a target level of the disaster hazard of the coal mining face based on the comprehensive evaluation index, and to prevent and control the coal mining face in response to the target level indicating that the coal mining face is in a dangerous state.

[0011] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: a processor; and a memory communicatively connected to the processor; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, so that the processor can execute the coal mining face prevention and control method described in the first aspect embodiment above.

[0012] To achieve the above-mentioned purpose, the fourth aspect of the present application proposes a computer-readable storage medium on which a computer program is stored, and the computer instructions are used to enable the computer to execute the coal mining face prevention and control method described in the above-mentioned first aspect of the embodiment.

[0013] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, including a computer program, which, when executed by a processor, implements the coal mining face prevention and control method described in the first aspect of the embodiment.

[0014] The prevention and control method, device, electronic device and storage medium for coal mining working faces provided in the present application obtain a first evaluation index of the disaster hazard of gas outburst in the coal mining working face, and a second evaluation index of the disaster hazard of spontaneous combustion in the coal mining working face, and calculate the comprehensive evaluation index of the disaster hazard of the coal mining working face based on the first evaluation index and the second evaluation index, and then determine whether the coal mining working face is in a dangerous state based on the comprehensive evaluation index, and if it is in a dangerous state, the coal mining working face is prevented and controlled. By conducting a comprehensive risk assessment of the coal mining working face, the overall disaster prediction and early warning capabilities of the coal mining working face are improved. By carrying out targeted prevention and control of each rating indicator of the comprehensive evaluation index, it is possible to achieve efficient coordinated prevention and control of multiple disasters in the coal mining working face, improve the overall disaster prevention and control capabilities of the coal mining working face, and reduce the probability of other disasters being caused during the disaster prevention period of the coal mining working face.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 A schematic flow chart of a prevention and control method for a coal mining face provided in an embodiment of the present application;

[0018] Figure 2 A schematic flow chart of another method for preventing and controlling coal mining working faces provided in an embodiment of the present application;

[0019] Figure 3A schematic flow chart of another method for preventing and controlling coal mining working faces provided in an embodiment of the present application;

[0020] Figure 4 A schematic flow chart of another method for preventing and controlling coal mining working faces provided in an embodiment of the present application;

[0021] Figure 5 A schematic structural diagram of a prevention and control device for a coal mining face provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0023] The following describes the prevention and control method and device for the coal mining face of an embodiment of the present application with reference to the accompanying drawings.

[0024] Figure 1 is a flow chart of a prevention and control method for a coal mining face according to an exemplary embodiment, such as Figure 1 As shown, the prevention and control method of the coal mining working face in the embodiment of the present application includes but is not limited to the following steps:

[0025] S101, monitor the combustible gas in the coal mining face, determine the first inventory information of the combustible gas in the coal mining face, and based on the first inventory information, determine the first evaluation index of the gas outburst disaster hazard in the coal mining face, the first inventory information at least includes the concentration information and content information of the combustible gas.

[0026] It should be noted that the execution subject of the prevention and control method of the coal mining face provided in the embodiment of the present application is an electronic device, which may be a terminal device. Optionally, the terminal device may be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), etc., and the non-mobile electronic device may be a personal computer (PC), a television, etc. The embodiment of the present application is not specifically limited.

[0027] In some implementations, the combustible gas at the coal mining face can be detected based on the mine safety monitoring system to obtain the concentration information, content information, etc. of the combustible gas at the coal mining face, and the concentration information and content information are used as the first inventory information of the combustible gas at the coal mining face. The combustible gas at the coal mining face may include methane gas, gas, etc.

[0028] Furthermore, the first evaluation index may be determined based on the concentration information and content information of the combustible gas in the first inventory information. That is, the first evaluation index includes the concentration and content of the combustible gas in the coal mining face.

[0029] Optionally, the first evaluation index includes but is not limited to: methane concentration in the return air corner of the coal mining working face, gas concentration in the return air lane of the coal mining working face, and residual gas content in the coal seam of the coal mining working face.

[0030] In some implementations, the coal recovery rate and the amount of gas discharged by wind of the coal mining face can also be obtained, and the coal recovery rate and the amount of gas discharged by wind are used as the first evaluation index. Optionally, the coal recovery rate of the coal mining face can be obtained by controlling the production activities of the mine. Optionally, the gas discharge amount can be calculated based on the maximum wind speed of the coal mining face, the cross-sectional area of ​​the coal mining face, and the maximum allowable gas concentration of the coal mining face.

[0031] S102, determine the natural ignition marker gas when natural fire occurs in the coal mining face, monitor the natural ignition marker gas in the coal mining face, determine the second inventory information of the natural ignition marker gas in the coal mining face, and based on the second inventory information, determine the second evaluation index of the natural fire disaster hazard of the coal mining face, the second inventory information at least includes the concentration information and composition information of the natural ignition marker gas.

[0032] It is understandable that in the field of coal, due to the mining of coal mines, coal will be exposed to the air and will produce oxidation and temperature rise until the coal spontaneously ignites. This process is called spontaneous combustion. In other words, gas will be released during the spontaneous combustion process, and the released gas is also the spontaneous combustion indicator gas.

[0033] Optionally, the natural ignition marker gas includes but is not limited to: carbon monoxide, carbon dioxide, sulfur dioxide, etc.

[0034] In some implementations, the gas generated under different temperature conditions can be determined by conducting a heating experiment on coal, and the gas can be used as a natural ignition marker gas when natural combustion occurs at the coal mining face. The natural ignition marker gas at the coal mining face can then be monitored in real time to obtain concentration information and composition information of the natural marker gas at the coal mining face, and the concentration information and composition information can be used as the second inventory information of the natural ignition marker gas.

[0035] Furthermore, the second evaluation index can be determined based on the concentration and composition of the spontaneous combustion marker gas in the second inventory information. That is, the second evaluation index can include: the composition and concentration of the spontaneous combustion marker gas of the oxidation zone coal inside the goaf, and the composition and concentration of the spontaneous combustion gas of the return air corner coal of the coal mining face.

[0036] In some implementations, the pressure difference at both ends of the coal mining face and the daily advancement speed of the coal mining face can also be used as the second evaluation index. For example, the pressure difference at both ends of the coal mining face can be determined based on the intelligent ventilation control system of the coal mining face. The production activities of the mine can be controlled to determine the actual daily advancement of the coal mining face, and the daily advancement speed of the coal mining face can be determined based on the actual advancement and the number of working days.

[0037] S103, based on the first evaluation index and the second evaluation index, determine the comprehensive evaluation index of disaster risk of the coal mining face.

[0038] In some implementations, the first evaluation index and the second evaluation index include an expected minimum index and an expected maximum index. In order to reduce the risk of spontaneous combustion and gas disasters in coal mining working faces, the expected minimum index and the expected maximum index can be standardized respectively, and the standardized evaluation indexes can be indexed to obtain a first index corresponding to the first evaluation index and a second index corresponding to the second evaluation index.

[0039] Furthermore, a comprehensive evaluation index is calculated based on the first index and the second index to obtain a comprehensive evaluation index for the disaster hazard of spontaneous combustion and gas outburst at the coal mining face. The comprehensive evaluation index reflects the level of coupled disaster hazard of spontaneous combustion and gas outburst. The larger the value, the higher the level of coupled disaster hazard.

[0040] S104, based on the comprehensive evaluation index of disaster risk, determine the target level of disaster risk of the coal mining face, and in response to the target level indicating that the coal mining face is in a dangerous state, carry out prevention and control of the coal mining face.

[0041] In some implementations, based on the size of the comprehensive disaster hazard evaluation index and the threshold ranges corresponding to different levels, if the comprehensive disaster hazard evaluation index is within any threshold range, the target level of the disaster hazard of the coal mining face is determined to be the level corresponding to any threshold range.

[0042] For example, the disaster risk of coal mining working face is divided into three levels: normal, general risk and severe risk. The corresponding threshold ranges are: (-∞, A), (A, B), (B, +∞). If the comprehensive evaluation index of disaster risk is D, and D is within (A, B), the target level is general risk.

[0043] Optionally, if the target level is any level of general danger and severe danger, it is determined that the coal mining face is in a dangerous state, and the coal mining face needs to be controlled. Optionally, the control of the coal mining face can be achieved by changing the index values ​​of the first evaluation index and the second evaluation index.

[0044] For example, the air volume of the coal mining face can be adjusted to change the gas concentration in the return air lane of the coal mining face, the amount of gas discharged from the coal mining face, and the pressure difference at both ends of the coal mining face.

[0045] For another example, the gas extraction mixture volume and the negative pressure of the extraction borehole in the goaf of the coal mining face, the gas extraction mixture volume and the negative pressure of the extraction borehole in the mining area of ​​the coal mining face can be adjusted to change the methane concentration in the return air corner of the coal mining face, the residual gas content in the coal seam of the coal mining face, the natural ignition mark gas composition and gas concentration of the oxidation zone coal in the goaf, and the natural ignition gas composition and gas concentration of the return air corner coal of the coal mining face.

[0046] For another example, the operating status of the fire prevention and extinguishing system in the goaf of the coal mining face can be adjusted to change the natural ignition signature gas composition and gas concentration of the oxidized zone coal inside the goaf, and the natural ignition gas composition and gas concentration of the return air corner coal of the coal mining face.

[0047] In the prevention and control method for the coal mining face provided in the embodiment of the present application, by obtaining a first evaluation index of the disaster hazard of gas outburst at the coal mining face and a second evaluation index of the disaster hazard of spontaneous combustion at the coal mining face, and calculating the comprehensive evaluation index of the disaster hazard of the coal mining face based on the first evaluation index and the second evaluation index, it is possible to determine whether the coal mining face is in a dangerous state based on the comprehensive evaluation index, and if it is in a dangerous state, the coal mining face is prevented and controlled. By conducting a comprehensive risk evaluation on the coal mining face, the overall disaster prediction and early warning capability of the coal mining face is improved. By carrying out targeted prevention and control on each rating indicator of the comprehensive evaluation index, it is possible to achieve efficient coordinated prevention and control of multiple disasters at the coal mining face, improve the overall disaster prevention and control capability of the coal mining face, and reduce the probability of other disasters being caused during the disaster prevention period of the coal mining face.

[0048] Figure 2 is a flow chart of a prevention and control method for a coal mining face according to an exemplary embodiment, such as Figure 2 As shown, the prevention and control method of the coal mining working face in the embodiment of the present application includes but is not limited to the following steps:

[0049] S201, monitor the combustible gas in the coal mining working face to determine the first inventory information of the combustible gas in the coal mining working face.

[0050] The relevant contents of step S201 can be found in the above embodiment and will not be described again here.

[0051] S202, based on the first inventory information, determine the concentration information and content information of the combustible gas, the combustible gas includes methane gas and methane gas.

[0052] S203, based on the concentration information of gas and methane gas, as well as the content information of gas, determine the methane concentration in the return air corner of the coal mining face, the gas concentration in the return air lane of the coal mining face, and the residual gas content in the coal seam of the coal mining face as the first evaluation index.

[0053] Optionally, the combustible gas includes gas and methane, and the concentration information and content information of the gas, as well as the concentration information and content information of the methane can be determined from the first inventory information. Then, the methane concentration of the return air corner of the coal mining face, the gas concentration of the return air lane of the coal mining face, and the residual gas content of the coal seam of the coal mining face can be determined as the first evaluation index.

[0054] Optionally, the coal recovery rate and the gas exhaust volume of the coal mining face can be used as the first evaluation index. The coal recovery rate of the coal mining face can be obtained by monitoring the production activities of the coal mining face. And / or, the gas exhaust volume of the coal mining face can be determined based on the maximum allowable wind speed of the coal mining face, the cross-sectional area of ​​the coal mining face and the maximum allowable gas concentration of the coal mining face. In other words, the first evaluation index also includes at least one of the coal recovery rate and the gas exhaust volume of the coal mining face.

[0055] Optionally, the formula for calculating the amount of gas exhausted by air in the coal mining face is as follows:

[0056] Q max =V max Sn t-max (1)

[0057] Among them, Q max is the gas exhaust volume of coal mining face, V max is the maximum allowable wind speed of the coal mining face, S is the cross-sectional area of ​​the coal mining face, n t-max The maximum allowable gas concentration in the mining face.

[0058] By way of example, the first evaluation index may be obtained based on a mine safety monitoring system, a mine production control system, and a coal seam gas extraction system. The first evaluation index and data related to the first evaluation index may be obtained based on the data interface of the above systems.

[0059] For example, through the data interface, the methane concentration of the return air corner of the coal mining face, the gas concentration of the return air lane of the coal mining face, the wind speed of the return air lane of the coal mining face, and the gas concentration of the return air lane are obtained from the mine safety monitoring system; through the data interface, the coal recovery rate of the coal mining face is obtained from the mine production control system; through the data interface, the residual gas content of the coal seam of the coal mining face is obtained from the coal seam gas extraction system. Furthermore, the amount of gas discharged from the coal mining face can be calculated by obtaining information such as the wind speed and gas concentration of the return air lane of the coal mining face.

[0060] S204, determine the natural ignition marker gas when natural fire occurs in the coal mining face, and monitor the natural ignition marker gas in the coal mining face to determine the second inventory information of the natural ignition marker gas in the coal mining face, and based on the second inventory information, determine the second evaluation index of the natural fire disaster hazard of the coal mining face, the second inventory information at least includes the concentration information and composition information of the natural ignition marker gas.

[0061] S205, determining a comprehensive evaluation index of disaster risk of the coal mining face based on the first evaluation index and the second evaluation index.

[0062] S206, based on the comprehensive evaluation index of disaster risk, determine the target level of disaster risk of the coal mining face, and in response to the target level indicating that the coal mining face is in a dangerous state, carry out prevention and control of the coal mining face.

[0063] The relevant contents of steps S204-S206 can be found in the above embodiment and will not be repeated here.

[0064] In the prevention and control method of the coal mining face provided in the embodiment of the present application, the first evaluation index of the gas outburst disaster hazard of the coal mining face is obtained by monitoring the combustible gases such as methane and gas in the coal mining face, and the second evaluation index of the natural combustion disaster hazard of the coal mining face is obtained by monitoring the spontaneous combustion marker gas, and the comprehensive evaluation index of the disaster hazard of the coal mining face is calculated based on the first evaluation index and the second evaluation index, and then it can be determined whether the coal mining face is in a dangerous state according to the comprehensive evaluation index, and if it is in a dangerous state, the coal mining face is prevented and controlled. By conducting a comprehensive hazard evaluation on the coal mining face, the overall disaster prediction and early warning capability of the coal mining face is improved. By carrying out targeted prevention and control on each rating indicator of the comprehensive evaluation index, it is possible to achieve efficient coordinated prevention and control of multiple disasters on the coal mining face, improve the overall disaster prevention and control capability of the coal mining face, and reduce the probability of other disasters caused during the disaster prevention period of the coal mining face.

[0065] Figure 3 is a flow chart of a prevention and control method for a coal mining face according to an exemplary embodiment, such as Figure 3As shown, the prevention and control method of the coal mining working face in the embodiment of the present application includes but is not limited to the following steps:

[0066] S301, monitor the combustible gas in the coal mining face, determine the first inventory information of the combustible gas in the coal mining face, and based on the first inventory information, determine the first evaluation index of the gas outburst disaster hazard of the coal mining face, the first inventory information at least includes the concentration information and content information of the combustible gas.

[0067] S302, determining the natural ignition marker gas when natural ignition occurs in the coal mining working face, and monitoring the natural ignition marker gas in the coal mining working face to determine the second inventory information of the natural ignition marker gas in the coal mining working face.

[0068] The relevant contents of steps S301 - S302 can be found in the above embodiment and will not be described again here.

[0069] S303: Determine the concentration information and composition information of the spontaneous ignition marker gas based on the second inventory information.

[0070] S304, based on the concentration information and the composition information, determine the natural ignition signature gas composition and gas concentration of the oxidized zone coal inside the goaf, as well as the natural ignition gas composition and gas concentration of the return air corner coal of the coal mining face as the second evaluation index.

[0071] Optionally, based on the concentration information and composition information of the spontaneous ignition marker gas, the spontaneous ignition marker gas composition and gas concentration of the oxidized zone coal inside the goaf, as well as the spontaneous ignition gas composition and gas concentration of the return air corner coal of the coal mining face can be determined as the second evaluation index.

[0072] Optionally, the pressure difference at both ends of the coal mining face and the daily advancement speed of the coal mining face can also be used as the second evaluation index. The pressure difference at both ends of the coal mining face can be obtained by monitoring the air pressure of the coal mining face. And / or, the production activities of the coal mining face are monitored to obtain the actual daily advancement of the coal mining face, and the daily advancement speed of the coal mining face is determined based on the actual daily advancement. In other words, the second evaluation index also includes at least one of the pressure difference at both ends of the coal mining face and the daily advancement speed of the coal mining face.

[0073] Optionally, based on the actual daily advancement, the formula for calculating the daily advancement speed of the coal mining face is as follows:

[0074]

[0075] Among them, V i is the daily advancement speed of the coal mining face, n is the average working cycle, d j is the actual advancement of the working face on the jth day.

[0076] In some implementations, the pressure difference at both ends of the coal mining face can also be calculated based on the maximum wind speed of the coal mining face, the cross-sectional size of the coal mining face, and the wind resistance of the coal mining face. The formula for calculating the pressure difference at both ends of the coal mining face is as follows:

[0077] H s-max =V 2 S 2 R (3)

[0078] Among them, H s-max is the pressure difference at both ends of the coal mining working face, V is the maximum allowable wind speed of the coal mining working face, S is the cross-sectional area of ​​the coal mining working face, and R is the wind resistance of the coal mining working face.

[0079] By way of example, the second evaluation index can be obtained based on the goaf spontaneous combustion warning system, the coal mining face intelligent ventilation control system, the mine safety monitoring system, and the mine production control system. The second evaluation index and data related to the second evaluation index can be obtained based on the development data interface of the above systems.

[0080] For example, by developing a data interface, the natural combustion gas composition and gas concentration of the oxidized coal in the goaf of the coal mining face can be obtained from the goaf natural combustion warning system; by developing a data interface, the pressure difference at both ends of the coal mining face can be obtained from the coal mining face intelligent ventilation control system; by developing a data interface, the natural combustion gas composition and gas concentration of the return air corner coal of the coal mining face can be obtained from the mine safety monitoring system; by developing a data interface, the actual daily advancement of the coal mining face can be obtained from the mine production control system, and based on the actual daily advancement of the coal mining face, the daily advancement speed of the coal mining face can be calculated using the above formula (2).

[0081] S305, determining a comprehensive evaluation index of disaster risk of the coal mining face based on the first evaluation index and the second evaluation index.

[0082] S306, based on the comprehensive evaluation index of disaster risk, determine the target level of disaster risk of the coal mining face, and in response to the target level indicating that the coal mining face is in a dangerous state, control the coal mining face.

[0083] The relevant contents of steps S305-S306 can be found in the above embodiment and will not be repeated here.

[0084] In the prevention and control method for the coal mining face provided in the embodiment of the present application, a first evaluation index of the disaster hazard of gas outburst at the coal mining face is obtained, and the spontaneous combustion marker gas is monitored to obtain a second evaluation index of the disaster hazard of spontaneous combustion at the coal mining face, and the comprehensive evaluation index of the disaster hazard of the coal mining face is calculated based on the first evaluation index and the second evaluation index, and then it can be determined whether the coal mining face is in a dangerous state based on the comprehensive evaluation index, and if it is in a dangerous state, the coal mining face is prevented and controlled. By conducting a comprehensive risk evaluation on the coal mining face, the overall disaster prediction and early warning capability of the coal mining face is improved. By carrying out targeted prevention and control on each rating indicator of the comprehensive evaluation index, it is possible to achieve efficient coordinated prevention and control of multiple disasters at the coal mining face, improve the overall disaster prevention and control capability of the coal mining face, and reduce the probability of other disasters being caused during the disaster prevention period of the coal mining face.

[0085] Figure 4 is a flow chart of a prevention and control method for a coal mining face according to an exemplary embodiment, such as Figure 4 As shown, the prevention and control method of the coal mining working face in the embodiment of the present application includes but is not limited to the following steps:

[0086] S401, monitor the combustible gas in the coal mining face, determine the first inventory information of the combustible gas in the coal mining face, and based on the first inventory information, determine the first evaluation index of the gas outburst disaster hazard in the coal mining face, the first inventory information at least includes the concentration information and content information of the combustible gas.

[0087] S402, determine the natural ignition marker gas when natural fire occurs in the coal mining face, and monitor the natural ignition marker gas in the coal mining face to determine the second inventory information of the natural ignition marker gas in the coal mining face, and based on the second inventory information, determine the second evaluation index of the natural fire disaster hazard of the coal mining face, the second inventory information at least includes the concentration information and composition information of the natural ignition marker gas.

[0088] The relevant contents of steps S401-S402 can be found in the above embodiment and will not be repeated here.

[0089] S403, based on the indicator types of the first evaluation indicator and the second evaluation indicator, standardize the first evaluation indicator and the second evaluation indicator to obtain a first evaluation index of the first evaluation indicator and a second evaluation index of the second evaluation indicator.

[0090] Optionally, the indicator types of the evaluation indicator include: expected minimum value type indicators and expected maximum value type indicators, wherein the smaller the indicator value of the expected minimum value type indicators, the greater the danger; and the larger the indicator value of the expected maximum value type indicators, the greater the danger.

[0091] In some implementations, the expected maximum indicators in the first evaluation indicator are the methane concentration in the return air corner of the coal mining face, the gas concentration in the return air lane of the coal mining face, the residual gas content in the coal seam of the coal mining face, the coal recovery and abandoned coal rate of the coal mining face, and the gas exhaust volume of the coal mining face; the expected minimum indicator in the second evaluation indicator is the daily advancement speed of the coal mining face, and the expected maximum indicator is the gas composition and gas concentration that mark the spontaneous combustion of coal in the oxidation zone inside the goaf, the pressure difference at both ends of the coal mining face, and the gas composition and gas concentration of the spontaneous combustion of coal in the return air corner of the coal mining face.

[0092] Optionally, the expected maximum size index is standardized to obtain the evaluation index formula as follows:

[0093]

[0094] Among them, X i-j is the evaluation index of the jth evaluation index of the i-th sample, x ij is the actual value of the jth evaluation index of the ith sample, a ij is the lower limit of the value of the jth evaluation index of the i-th sample, b ij is the upper limit of the value of the j-th evaluation index of the ith sample.

[0095] Optionally, the expected minimum size index is standardized to obtain the evaluation index formula as follows:

[0096]

[0097] Among them, X i-j is the evaluation index of the jth evaluation index of the i-th sample, x ij is the actual value of the jth evaluation index of the ith sample, a ij is the lower limit of the value of the jth evaluation index of the i-th sample, b ij is the upper limit of the value of the j-th evaluation index of the ith sample.

[0098] That is to say, the expected extremely large index of the first evaluation index and the expected extremely small index of the second evaluation index can be substituted into the above formula (4), and the expected extremely small index can be substituted into the above formula (5) to calculate the first evaluation index of the first evaluation index and the second evaluation index of the second evaluation index, wherein the values ​​of the first evaluation index and the second evaluation index are 0-1.

[0099] S404: Determine a first index of the first evaluation indicator according to the first evaluation index and the number of the first evaluation index.

[0100] In some implementations, by determining the number of first evaluation indexes and determining the weight value corresponding to each first evaluation index, the first index of the first evaluation indicator can be calculated according to the weight value, the number and the first evaluation index. Optionally, the formula for calculating the first index is as follows:

[0101]

[0102] Among them, U2 is the first index of the first evaluation index; k is the number of the first evaluation index; w i-2 is the weight value of the first evaluation index of the i-th item.

[0103] S405: Determine a second index of the second evaluation indicator according to the second evaluation index and the number of the second evaluation index.

[0104] In some implementations, by determining the number of second evaluation indexes and determining the weight value corresponding to each second evaluation index, the second index of the second evaluation indicator can be calculated according to the weight value, the number and the second evaluation index. Optionally, the formula for calculating the second index is as follows:

[0105]

[0106] Among them, U1 is the second index of the second evaluation index; m is the number of the second evaluation index; w i-1 is the weight value of the second evaluation index of the i-th item.

[0107] S406, based on the first index and the second index, determine a comprehensive evaluation index of disaster risk of the coal mining face.

[0108] Optionally, based on the first index and the second index, the formula for calculating the comprehensive evaluation index of disaster risk of the coal mining face is as follows:

[0109]

[0110] Among them, D is the comprehensive evaluation index of disaster risk; a is the degree of disaster risk of spontaneous combustion of coal mining face, b is the degree of disaster risk of gas outburst; U1 is the second index; U2 is the first index. Optionally, it can be considered that spontaneous combustion and gas outburst of coal mining face are equally dangerous, then a=b=0.5 can be considered.

[0111] S407, based on the comprehensive evaluation index of disaster risk, determine the target level of disaster risk of the coal mining face, and in response to the target level indicating that the coal mining face is in a dangerous state, carry out prevention and control of the coal mining face.

[0112] In some implementations, the level threshold of the disaster-causing risk can be obtained, and based on the level threshold and the comprehensive evaluation index of the disaster-causing risk, the target level of the disaster-causing risk of the coal mining face can be determined. That is to say, there are multiple candidate levels for the disaster-causing risk of the coal mining face, each candidate level has a level threshold, and by obtaining the level threshold and judging the size of the comprehensive evaluation index of the disaster-causing risk and the level threshold, the target level of the disaster-causing risk can be determined.

[0113] For example, let the candidate levels be normal, general danger, and severe danger respectively, and the comprehensive evaluation index of the disaster-causing risk be D. If the level threshold corresponding to the normal level is A, and the level thresholds corresponding to the general danger level and the severe danger level are B, when D < A, it is determined that the disaster-causing risk is at the normal level; when A < D < B, it is determined that the disaster-causing risk is at the general danger level; when B < D, it is determined that the disaster-causing risk is at the severe danger level.

[0114] In some implementations, when it is determined that prevention and control of the coal mining face are required, the index values of the first evaluation index and the second evaluation index can be adjusted to achieve prevention and control of the coal mining face and avoid disasters such as fires.

[0115] Exemplarily, by controlling the intelligent ventilation regulation system of the coal mining face, the gas drainage system in the goaf and the in-seam gas drainage system of the coal mining face, and the fire prevention and extinguishing system in the goaf of the coal mining face, the index values of the first evaluation index and the second evaluation index can be adjusted.

[0116] For example, by developing a control interface, an operation status adjustment instruction is sent to the intelligent ventilation regulation system of the coal mining face, and the regulating air window of the coal mining face is remotely controlled to change the air volume of the coal mining face, indirectly changing the natural fire occurrence and gas disaster-causing risk index values of the coal mining face (this evaluation index includes the gas concentration in the return airway of the coal mining face, the gas discharged by ventilation in the coal mining face, and the pressure difference at both ends of the coal mining face).

[0117] For another example, by developing a control interface, an operation status adjustment instruction is sent to the gas drainage system in the goaf and the in-seam gas drainage system of the coal mining face, and the mixed gas drainage volume and the orifice negative pressure of the gas drainage borehole in the goaf of the coal mining face, and the mixed gas drainage volume and the orifice negative pressure of the gas drainage borehole in the mining area of the coal mining face are remotely controlled, indirectly changing the natural fire occurrence and gas disaster-causing risk index values of the coal mining face (this evaluation index includes the methane concentration in the return corner of the coal mining face, the remaining gas content in the in-seam of the coal mining face, the gas components and gas concentrations of the natural fire occurrence marking gas in the internal oxidation zone of the goaf, and the gas components and gas concentrations of the natural fire occurrence gas in the return corner of the coal mining face).

[0118] For another example, by developing a control interface, an operating status adjustment instruction is issued to the fire prevention and extinguishing system in the goaf of the coal mining face, and the nitrogen injection or grouting equipment is remotely controlled to be turned on, the nitrogen injection rate or the grouting rate, thereby indirectly changing the index value of the natural combustion and gas disaster hazard of the coal mining face (the evaluation index includes the natural combustion sign gas composition and gas concentration of the oxidation zone coal in the goaf, and the natural combustion gas composition and gas concentration of the return air corner coal of the coal mining face).

[0119] Furthermore, after adjusting the index value of the evaluation index, it is also necessary to continuously monitor the adjusted first evaluation index and the second evaluation index to obtain the adjusted comprehensive evaluation index of disaster hazard, so as to judge whether to continue to prevent and control the coal mining face based on the adjusted comprehensive evaluation index of disaster hazard, and in response to no need for prevention and control, determine that the coal mining face is in a safe state.

[0120] In the prevention and control method for the coal mining face provided in the embodiment of the present application, a first evaluation index of the disaster hazard of gas outburst at the coal mining face is obtained, and the spontaneous combustion marker gas is monitored to obtain a second evaluation index of the disaster hazard of spontaneous combustion at the coal mining face, and an evaluation index is calculated based on the first evaluation index and the second evaluation index to determine the comprehensive evaluation index of the disaster hazard of the coal mining face, and then it can be determined whether the coal mining face is in a dangerous state based on the comprehensive evaluation index, and if it is in a dangerous state, the coal mining face is prevented and controlled. By conducting a comprehensive hazard evaluation on the coal mining face, the overall disaster prediction and early warning capability of the coal mining face is improved. By carrying out targeted prevention and control on each rating indicator of the comprehensive evaluation index, it is possible to achieve efficient coordinated prevention and control of multiple disasters at the coal mining face, improve the overall disaster prevention and control capability of the coal mining face, and reduce the probability of other disasters being caused during the disaster prevention period of the coal mining face.

[0121] In order to implement the above-mentioned embodiment, the present application also proposes a prevention and control device for a coal mining face.

[0122] Figure 5 A schematic structural diagram of a prevention and control device for a coal mining face provided in an embodiment of the present application.

[0123] like Figure 5 As shown, the prevention and control device 500 of the coal mining working face includes:

[0124] A first determination module 501 is used to monitor the combustible gas at the coal mining face, determine the first inventory information of the combustible gas at the coal mining face, and determine the first evaluation index of the gas outburst disaster risk at the coal mining face based on the first inventory information, wherein the first inventory information at least includes the concentration information and content information of the combustible gas;

[0125] The second determination module 502 is used to determine the natural combustion marker gas when the natural combustion occurs in the coal mining face, and monitor the natural combustion marker gas in the coal mining face to determine the second inventory information of the natural combustion marker gas in the coal mining face, and determine the second evaluation index of the natural combustion disaster hazard of the coal mining face based on the second inventory information, wherein the second inventory information at least includes the concentration information and composition information of the natural combustion marker gas;

[0126] A third determination module 503 is used to determine a comprehensive evaluation index of disaster risk of the coal mining face based on the first evaluation index and the second evaluation index;

[0127] The prevention and control module 504 is used to determine the target level of disaster risk of the coal mining face based on the comprehensive evaluation index of disaster risk, and to prevent and control the coal mining face in response to the target level indicating that the coal mining face is in a dangerous state.

[0128] In a possible implementation of an embodiment of the present application, the first determination module 501 is also used to: determine the concentration information and content information of the combustible gas based on the first inventory information, the combustible gas including gaseous gas and methane gas; based on the concentration information of the gas gas and the methane gas, as well as the content information of the gas gas, determine the methane concentration in the return air corner of the coal mining working face, the gas concentration in the return air lane of the coal mining working face, and the residual gas content in the coal seam of the coal mining working face as the first evaluation indicator.

[0129] In a possible implementation of the embodiment of the present application, the first determination module 501 is also used to: monitor the production activities of the coal mining face to obtain the coal recovery and abandoned coal rate of the coal mining face; and / or, based on the maximum allowable wind speed of the coal mining face, the cross-sectional area of ​​the coal mining face and the maximum allowable gas concentration of the coal mining face, determine the amount of gas discharged by the coal mining face; the first evaluation index also includes at least one of the coal recovery and abandoned coal rate and the amount of gas discharged by the coal mining face.

[0130] In a possible implementation of an embodiment of the present application, the second determination module 502 is also used to: determine the concentration information and composition information of the natural ignition marker gas based on the second inventory information; determine the natural ignition marker gas composition and gas concentration of the oxidized zone coal inside the goaf, as well as the natural ignition gas composition and gas concentration of the return air corner coal of the coal mining face based on the concentration information and composition information, as the second evaluation index.

[0131] In a possible implementation of an embodiment of the present application, the second determination module 502 is also used to: monitor the air pressure of the coal mining face to obtain the pressure difference at both ends of the coal mining face; and / or monitor the production activities of the coal mining face to obtain the actual daily advancement of the coal mining face, and determine the daily advancement speed of the coal mining face based on the actual daily advancement; the second evaluation index also includes at least one of the pressure difference at both ends of the coal mining face and the daily advancement speed of the coal mining face.

[0132] In a possible implementation method of the embodiment of the present application, the third determination module 503 is also used to: based on the indicator types of the first evaluation indicator and the second evaluation indicator, standardize the first evaluation indicator and the second evaluation indicator to obtain a first evaluation index of the first evaluation indicator and a second evaluation index of the second evaluation indicator; determine the first index of the first evaluation indicator according to the first evaluation index and the number of the first evaluation index; determine the second index of the second evaluation index according to the second evaluation index and the number of the second evaluation index; determine the comprehensive evaluation index of disaster risk of the coal mining face based on the first index and the second index.

[0133] In a possible implementation of an embodiment of the present application, the prevention and control module 504 is also used to: obtain a level threshold of disaster hazard; and determine a target level of disaster hazard of the coal mining face based on the level threshold and the comprehensive evaluation index of disaster hazard.

[0134] In a possible implementation of an embodiment of the present application, the prevention and control module 504 is also used to: adjust the index values ​​of the first evaluation index and the second evaluation index; continuously monitor the adjusted first evaluation index and the second evaluation index to obtain an adjusted comprehensive evaluation index of disaster hazard; based on the adjusted comprehensive evaluation index of disaster hazard, determine whether to continue to prevent and control the coal mining face, and in response to no need for prevention and control, determine that the coal mining face is in a safe state.

[0135] In the prevention and control device for the coal mining face provided in the embodiment of the present application, by obtaining a first evaluation index of the disaster hazard of gas outburst at the coal mining face and a second evaluation index of the disaster hazard of spontaneous combustion at the coal mining face, and calculating the comprehensive evaluation index of the disaster hazard of the coal mining face based on the first evaluation index and the second evaluation index, it is possible to determine whether the coal mining face is in a dangerous state based on the comprehensive evaluation index, and if it is in a dangerous state, the coal mining face is prevented and controlled. By conducting a comprehensive risk evaluation on the coal mining face, the overall disaster prediction and early warning capability of the coal mining face is improved. By carrying out targeted prevention and control on each rating indicator of the comprehensive evaluation index, it is possible to achieve efficient coordinated prevention and control of multiple disasters at the coal mining face, improve the overall disaster prevention and control capability of the coal mining face, and reduce the probability of other disasters being caused during the disaster prevention period of the coal mining face.

[0136] It should be noted that the aforementioned explanation of the embodiment of the prevention and control method for the coal mining working face is also applicable to the prevention and control device for the coal mining working face of this embodiment, and will not be repeated here.

[0137] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0138] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0139] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0140] The collection, storage, use, processing, transmission, provision and application of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0141] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0142] This application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, this application is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, risks can be minimized by limiting data collection and deleting data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of users.

[0143] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0144] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0145] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0146] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0147] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0148] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0149] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0150] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A prevention and control method for coal mining working face, It is characterized in that include: Monitoring the combustible gas at the coal mining face, determining first inventory information of the combustible gas at the coal mining face, and determining a first evaluation index of the gas outburst disaster risk at the coal mining face based on the first inventory information, wherein the first inventory information at least includes concentration information and content information of the combustible gas; Determine the natural ignition marker gas when natural ignition occurs in the coal mining face, monitor the natural ignition marker gas in the coal mining face, determine the second inventory information of the natural ignition marker gas in the coal mining face, and determine the second evaluation index of the natural ignition disaster hazard of the coal mining face based on the second inventory information, wherein the second inventory information includes at least the concentration information and composition information of the natural ignition marker gas; Determining a comprehensive evaluation index of disaster risk of the coal mining face based on the first evaluation index and the second evaluation index; Based on the comprehensive evaluation index of disaster risk, a target level of disaster risk of the coal mining face is determined, and in response to the target level indicating that the coal mining face is in a dangerous state, control is performed on the coal mining face.

2. The method according to claim 1, It is characterized in that The first evaluation index of the gas outburst disaster risk of the coal mining face is determined based on the first inventory information, including: Based on the first inventory information, determining the concentration information and content information of the combustible gas, the combustible gas including gaseous gas and methane gas; Based on the concentration information of the gas and the methane gas, as well as the content information of the gas, the methane concentration in the return air corner of the coal mining face, the gas concentration in the return air lane of the coal mining face and the residual gas content in the coal seam of the coal mining face are determined as the first evaluation index.

3. The method according to claim 1 or 2, It is characterized in that The method further comprises: Monitoring the production activities of the coal mining face to obtain the coal recovery and lost coal rate of the coal mining face; and / or, Determine the gas exhaust volume of the coal mining face based on the maximum allowable wind speed of the coal mining face, the cross-sectional area of ​​the coal mining face and the maximum allowable gas concentration of the coal mining face; The first evaluation index also includes at least one of the coal recovery rate and the gas exhaust volume of the coal mining face.

4. The method according to claim 1, It is characterized in that Determining the second evaluation index of the risk of spontaneous combustion disaster at the coal mining face based on the second inventory information includes: Based on the second inventory information, determining the concentration information and composition information of the spontaneous ignition marker gas; Based on the concentration information and component information, the natural ignition signature gas composition and gas concentration of the oxidized zone coal inside the goaf, as well as the natural ignition gas composition and gas concentration of the return air corner coal of the coal mining face are determined as the second evaluation index.

5. The method according to claim 1 or 4, It is characterized in that The method further comprises: Monitoring the air pressure of the coal mining face to obtain the pressure difference at both ends of the coal mining face; and / or, Monitoring the production activities of the coal mining face to obtain the actual daily advancement of the coal mining face, and determining the daily advancement speed of the coal mining face based on the actual daily advancement; The second evaluation index also includes at least one of the pressure difference at both ends of the coal mining working face and the daily advancement speed of the coal mining working face.

6. The method according to claim 1, It is characterized in that The step of determining the disaster risk comprehensive evaluation index of the coal mining face based on the first evaluation index and the second evaluation index includes: Based on the indicator types of the first evaluation indicator and the second evaluation indicator, the first evaluation indicator and the second evaluation indicator are standardized to obtain a first evaluation index of the first evaluation indicator and a second evaluation index of the second evaluation indicator; Determining a first index of the first evaluation indicator according to the first evaluation index and the number of the first evaluation index; Determining a second index of the second evaluation indicator according to the second evaluation index and the number of the second evaluation index; Based on the first index and the second index, a comprehensive evaluation index of disaster risk of the coal mining face is determined.

7. The method according to claim 6, It is characterized in that Determining the target level of disaster risk of the coal mining face based on the comprehensive evaluation index of disaster risk includes: Obtaining the level threshold of disaster risk; Based on the level threshold and the comprehensive evaluation index of disaster risk, the target level of disaster risk of the coal mining face is determined.

8. The method according to claim 1, It is characterized in that The prevention and control of the coal mining working face includes: Adjusting the index values ​​of the first evaluation index and the second evaluation index; Continuously monitor the adjusted first evaluation index and second evaluation index to obtain the adjusted comprehensive evaluation index of disaster risk; Based on the adjusted comprehensive evaluation index of disaster risk, it is determined whether to continue to carry out prevention and control on the coal mining face, and in response to the fact that no prevention and control is needed, it is determined that the coal mining face is in a safe state.

9. A prevention and control device for coal mining working face, It is characterized in that include: A first determination module is used to monitor the combustible gas at the coal mining face, determine the first inventory information of the combustible gas at the coal mining face, and determine the first evaluation index of the gas outburst disaster hazard at the coal mining face based on the first inventory information, wherein the first inventory information at least includes the concentration information and content information of the combustible gas; A second determination module is used to determine the natural ignition marker gas when the natural ignition occurs in the coal mining face, and monitor the natural ignition marker gas in the coal mining face to determine the second inventory information of the natural ignition marker gas in the coal mining face, and based on the second inventory information, determine the second evaluation index of the natural ignition disaster hazard of the coal mining face, wherein the second inventory information at least includes the concentration information and composition information of the natural ignition marker gas; A third determination module, configured to determine a comprehensive evaluation index of disaster risk of the coal mining face based on the first evaluation index and the second evaluation index; A prevention and control module is used to determine the target level of disaster risk of the coal mining face based on the comprehensive evaluation index of disaster risk, and to prevent and control the coal mining face in response to the target level indicating that the coal mining face is in a dangerous state.

10. An electronic device, It is characterized in that include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 8.

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