Real-time monitoring method and device for gas pressure in front of coal seam tunneling working face

Abstract

This application proposes a method and device for real-time monitoring of gas pressure ahead of a coal seam tunneling face. The method includes: acquiring basic parameters of the tunneling face; acquiring basic parameters of the coal seam gas; acquiring a gas release attenuation factor from the coal wall and a gas emission attenuation coefficient from falling coal based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas; and obtaining the coal seam gas pressure ahead of the tunneling face by combining the basic parameters of the tunneling face, the basic parameters of the coal seam gas, the gas release attenuation factor from the coal wall and the gas emission attenuation coefficient from falling coal with a calculation model for inverting coal seam gas pressure from gas emission at the tunneling face, thereby realizing real-time continuous monitoring of coal seam gas pressure ahead of the tunneling face.

Description

Technical Field

[0001] This application relates to the field of coal mine safety technology, and in particular to a method and device for real-time monitoring of gas pressure in front of a coal seam tunneling face. Background Technology

[0002] Coal seam gas pressure is the direct driving force behind coal and gas outbursts (referred to as "outbursts") and is one of the important indicators for evaluating the risk of coal seam outbursts. Currently, the main method for measuring coal seam gas pressure in underground coal mines is through pressure-measuring boreholes. This method has a long measurement cycle, and the test results are affected by the number and location of the measuring points. Summary of the Invention

[0003] This application provides a method and apparatus for real-time monitoring of gas pressure ahead of the working face in coal seam tunneling, thereby at least partially solving one of the technical problems in related technologies. The technical solution of this disclosure is as follows:

[0004] In a first aspect, embodiments of this application propose a method for real-time monitoring of gas pressure ahead of a coal seam tunneling face, including:

[0005] Obtain basic parameters of the tunneling face;

[0006] Obtain basic parameters of coal seam gas during tunneling;

[0007] Based on the basic parameters of the tunneling face and the basic parameters of the gas in the tunneling coal seam, the coal wall gas release attenuation factor and the coal falling gas emission attenuation coefficient are obtained.

[0008] Based on the basic parameters of the tunneling face, the basic parameters of the gas in the tunneling coal seam, the gas release attenuation factor of the coal wall and the gas emission attenuation coefficient of the falling coal, and combined with the calculation model of the gas emission inversion of the tunneling face to calculate the gas pressure of the coal seam, the gas pressure of the tunneling face is obtained.

[0009] Secondly, embodiments of this application propose a real-time monitoring device for gas pressure ahead of a coal seam tunneling face, comprising:

[0010] The data acquisition module is used to acquire basic parameters of the tunneling face;

[0011] The data acquisition module is used to acquire basic parameters of gas in the tunneling coal seam;

[0012] The data processing module is used to obtain the coal wall gas release attenuation factor and the coal-falling gas emission attenuation coefficient based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas.

[0013] The data processing module is used to obtain the coal seam gas pressure of the tunneling face based on the basic parameters of the tunneling face, the basic parameters of the tunneling coal seam gas, the coal wall gas release attenuation factor and the coal falling gas emission attenuation coefficient, combined with the calculation model of coal seam gas pressure inversion from the tunneling face gas emission.

[0014] Thirdly, embodiments of this application provide an electronic device, including: 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 described in the first aspect.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method described in the first aspect.

[0016] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0017] The method and device for real-time monitoring of gas pressure in front of the coal seam tunneling face provided in this application constructs a calculation model for coal seam gas pressure by inverting gas outburst from the tunneling face. Based on this model and the basic parameters of the tunneling face and the basic parameters of the coal seam gas, the coal seam gas pressure in the tunneling face is obtained. This realizes real-time continuous monitoring of coal seam gas pressure in front of the tunneling face, which plays an important role in early warning of outbursts.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 A flowchart illustrating a method for real-time monitoring of gas pressure ahead of a coal seam tunneling face, provided in an embodiment of this application;

[0021] Figure 2 (a) and (b) are the side view and top view of the gas flow field at the tunnel face, respectively.

[0022] Figure 3 This is a schematic diagram of the arrangement structure of the methane concentration monitoring sensor in the tunnel provided in the embodiments of this application;

[0023] Figure 4This is a schematic diagram illustrating the ideal coal wall gas emission pattern in a roadway, as provided in an embodiment of this application.

[0024] Figure 5 A block diagram of a real-time monitoring device for gas pressure ahead of a coal seam tunneling face, provided in an embodiment of this application;

[0025] Figure 6 This is a block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0027] The following describes, with reference to the accompanying drawings, a method, apparatus, and equipment for real-time monitoring of gas pressure ahead of the coal seam tunneling face according to embodiments of this application.

[0028] Figure 1 This is a flowchart illustrating a method for real-time monitoring of gas pressure ahead of a coal seam tunneling face, provided in an embodiment of this application.

[0029] It should be noted that the execution subject of the real-time monitoring method for gas pressure in front of the coal seam tunneling face in this application embodiment is the real-time monitoring device for gas pressure in front of the coal seam tunneling face in this application embodiment. The real-time monitoring device for gas pressure in front of the coal seam tunneling face can be configured in an electronic device so that the electronic device can perform the real-time monitoring function of gas pressure in front of the coal seam tunneling face.

[0030] like Figure 1 As shown, the real-time monitoring method for gas pressure ahead of the coal seam tunneling face includes the following steps:

[0031] Step S101: Obtain the basic parameters of the tunneling face.

[0032] In some embodiments, the basic parameters of the tunneling face may include, but are not limited to: coal seam thickness, tunneling face height, tunneling face width, coal density, number of tunneling operation cycles per day, coal cutting progress per single cycle of the tunneling face, coal accumulation non-uniformity coefficient, and total exposure time of the tunneling face.

[0033] Step S102: Obtain basic parameters of gas in the tunneling coal seam.

[0034] In some embodiments, the basic parameters of coal seam gas in tunneling may include, but are not limited to: coal seam permeability coefficient, coal seam gas outburst parameter K1, gas emission data of the tunneling face when the tunneling face stops working, and gas emission volume of the tunneling face in the last working cycle of a day.

[0035] In one embodiment, the coal seam permeability coefficient is obtained by testing according to the permeability coefficient test method.

[0036] In this embodiment, the coal seam gas outburst parameter K1 is obtained through a testing method. This coal seam gas outburst parameter K1 is used to obtain the boundary radius of the coal seam gas pressure seepage field.

[0037] Step S103: Based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas, obtain the coal wall gas release attenuation factor and the coal-falling gas emission attenuation coefficient.

[0038] In some embodiments, based on the gas emission data of the tunneling face when it stops working, the initial gas emission rate q0 and the gas release attenuation factor α of the coal face are obtained by fitting one of the following two fitting formulas; one of the fitting formulas is expressed as follows:

[0039]

[0040] Where, q t The gas flow rate per unit area of ​​the coal face within time t is obtained from the gas emission data of the tunneling face when it stops working (methane concentration monitored at T2 multiplied by air volume).

[0041] When the tunneling face is stopped for more than one day, the following formula is used for fitting.

[0042]

[0043] Where S' is the face area, S'=S+ch, S is the average exposed area within the exposure time range of the tunnel, and c is the width of the tunnel face.

[0044] In some embodiments, based on the basic parameters of the tunneling face and the gas emission rate of the tunneling face during the last working cycle of the day, the initial emission rate q0' and the gas emission attenuation coefficient β of the coal-fired gas are obtained by fitting the following formula:

[0045] Qt=Xq0'e -βt2

[0046] X=kdchγ

[0047] Where Qt is the gas emission from the tunneling face during the last work cycle of the day, k is the coal body unevenness coefficient, c is the tunnel width of the tunneling face, γ is the coal density, h is the tunnel height of the tunneling face, and d is the coal cutting advance in a single cycle of the tunneling face.

[0048] The gas emission rate at the tunneling face during the last working cycle of the day is obtained from the gas emission monitoring data of the tunneling face during the last working cycle of the day (T2 monitoring methane concentration multiplied by air volume).

[0049] In this embodiment, the air volume refers to the wind speed, which can be obtained through a wind speed sensor; for example, by collecting the wind speed at the tunnel face and combining it with the methane concentration at the air outlet T2, the total gas emission at the tunnel face can be obtained.

[0050] In this embodiment, the gas emission data of the tunneling face when it stops working is used to obtain the coal wall gas emission attenuation coefficient (i.e., coal wall gas release attenuation factor) by fitting a formula, and the gas emission amount of the tunneling face in the last working cycle of the day is used to obtain the coal falling gas emission attenuation coefficient by fitting a formula.

[0051] Step S104: Based on the basic parameters of the tunneling face, the basic parameters of the gas in the tunneling coal seam, the gas release attenuation factor of the coal wall, and the gas emission attenuation coefficient of the falling coal, the gas pressure of the coal seam in the tunneling face is obtained by combining the gas emission inversion calculation model of the tunneling face to calculate the gas pressure of the coal seam.

[0052] In this embodiment, the calculation model for coal seam gas pressure inversion based on gas outburst at the tunneling face is constructed based on the following assumptions:

[0053] (1) The coal seam is an infinitely extending region in the horizontal direction;

[0054] (2) Gas flow within the coal seam exists in the form of seepage and follows Atlantis's law;

[0055] (3) There is a stable flow region in the newly exposed working face of the tunneling that varies with time, and the stable flow lasts for 24 hours;

[0056] (4) Under three-dimensional conditions, the gas transport around the tunnel face can be described by the differential equation of the spherical flow field (see the gas flow field at the tunnel face). Figure 2 In one day, R0 = R n , r0 = r n ).

[0057] In some embodiments, the calculation model for inverting coal seam gas pressure from gas outburst at the tunneling face is represented as follows:

[0058]

[0059] Q' = QQ" - Q"'

[0060]

[0061] Where p0 is the coal seam gas pressure, p a Atmospheric pressure (0.1 MPa); R0 and r0 are the boundary radius of the coal seam gas pressure seepage field (equal to the distance corresponding to the maximum value of the coal seam gas outburst parameter K1 measured at the tunneling face) and the boundary radius of the atmospheric pressure seepage field (1-2 m in front of the coal seam), respectively; n is the number of tunneling operation cycles in one day (tunneling operations include coal cutting and belt conveyor coal, permanent support, temporary support, and loose coal removal, and the value is taken according to the site conditions); A0 is the spherical area of ​​radius R0; λ is the coal seam permeability coefficient (which can be obtained according to the permeability coefficient test method); Q' is the gas emission rate of the newly exposed face during tunneling, and Q is the total gas emission rate of the tunneling face (equal to the air volume of the tunneling face multiplied by the methane concentration at the air outlet T2; see the methane concentration monitoring sensor layout in the tunneling roadway for details). Figure 3 Q” represents the amount of gas emitted from the coal face on both sides of the tunnel face (the ideal gas emission pattern of the coal face in a tunnel is as follows). Figure 4 As shown, the total exposure time of the t1 tunnel is q. m (m-th segment gas emission rate), Q”' is the amount of gas emitted from the coal face; t2 is the average residence time of coal falling in each cycle, q0’ is the initial emission rate of gas from the coal face, β is the gas emission attenuation coefficient of the coal face, X is the coal accumulation height of one cycle; S is the average exposed area within the exposure time range of the tunnel, t1 is the total exposure time of the tunnel, q0 is the initial gas emission rate of the coal wall, and α is the gas release attenuation factor of the coal wall.

[0062] In some embodiments, A0 is obtained based on the basic parameters of the tunneling face using the following formula:

[0063] A0=πR0 2 ∫sinθdθ

[0064]

[0065] Where M is the coal seam thickness, h is the roadway height of the tunneling face, and d is the coal cutting advance in a single cycle of the tunneling face.

[0066] In some embodiments, the average exposed area S within the exposure time range of the tunnel is obtained by the following formula:

[0067] S=2χx0h

[0068] Where x0 is the equivalent average advance within time t1; h is the height of the tunnel face; χ is the coal seam thickness related factor, if M>h then χ>1, otherwise χ=1.

[0069] In some embodiments, after obtaining the coal seam gas pressure at the tunneling face, the process may further include: calculating the coal seam gas content based on the coal seam gas pressure at the tunneling face and the mapping relationship between the gas pressure and the coal seam gas content; comparing the coal seam gas content with the measured coal seam gas content, and obtaining the verification results of the calculation model for coal seam gas pressure inversion from the tunneling face based on the comparison results.

[0070] In this embodiment, based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas, the relevant parameter values ​​of the calculation model for the coal seam gas pressure inversion from the tunneling face are obtained. The obtained parameter values ​​are substituted into the calculation model for the coal seam gas pressure inversion from the tunneling face to obtain the coal seam gas pressure of the tunneling face. This enables real-time and continuous monitoring of the coal seam gas pressure in front of the tunneling face, which plays an important role in early warning of outbursts.

[0071] Therefore, based on data such as coal seam permeability coefficient, measured K1 value, daily tunneling procedures, tunnel dimensions, and ventilation volume, the coal seam gas pressure is obtained by combining the real-time monitored gas concentration at the air outlet with a gas outburst inversion calculation model constructed at the tunneling face to derive the coal seam gas pressure.

[0072] This embodiment presents a real-time monitoring method for gas pressure ahead of the coal seam tunneling face. It constructs a calculation model for coal seam gas pressure by inverting gas emission from the tunneling face. Based on this model and the basic parameters of the tunneling face and the basic parameters of the coal seam gas, the coal seam gas pressure at the tunneling face is obtained. This method achieves real-time continuous monitoring of coal seam gas pressure ahead of the tunneling face, playing a crucial role in early warning of coal outbursts.

[0073] To achieve the above embodiments, this application also proposes a real-time monitoring device for gas pressure in front of the coal seam tunneling face. Figure 5 This is a schematic diagram of a real-time monitoring device for gas pressure ahead of a coal seam tunneling face, provided as an embodiment of this application. Figure 5 As shown, the real-time monitoring device for gas pressure in front of the coal seam tunneling face may include: a data acquisition module 501 and a data processing module 502.

[0074] Among them, the data acquisition module 501 is used to acquire the basic parameters of the tunneling face;

[0075] Data acquisition module 501 is used to acquire basic parameters of gas in the tunneling coal seam;

[0076] Data processing module 502 is used to obtain the coal wall gas release attenuation factor and the coal falling gas emission attenuation coefficient based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas.

[0077] The data processing module 502 is used to obtain the coal seam gas pressure of the tunneling face based on the basic parameters of the tunneling face, the basic parameters of the tunneling coal seam gas, the coal wall gas release attenuation factor and the coal falling gas emission attenuation coefficient, combined with the coal seam gas pressure calculation model of the tunneling face gas emission inversion.

[0078] Furthermore, in one possible implementation of this application embodiment, the calculation model for calculating coal seam gas pressure by inverting gas outburst at the tunneling face is expressed as follows:

[0079]

[0080] Q' = QQ" - Q"'

[0081]

[0082] Where p0 is the coal seam gas pressure, p a λ represents atmospheric pressure; R0 and r0 represent the boundary radii of the coal seam gas pressure seepage field and the atmospheric pressure seepage field, respectively; n represents the number of tunneling cycles per day; A0 represents the spherical area of ​​radius R0; λ represents the coal seam permeability coefficient; Q' represents the gas emission from the newly exposed face, Q represents the total gas emission from the face, Q” represents the gas emission from the coal walls on both sides of the tunnel face, and Q”' represents the gas emission from the falling coal at the face; t2 represents the average residence time of falling coal in each cycle, q0' represents the initial gas emission rate from the falling coal, β represents the gas emission attenuation coefficient from the falling coal, X represents the coal accumulation height in one cycle; S represents the average exposed area within the exposure time range of the tunneling roadway, t1 represents the total exposure time of the tunneling roadway, q0 represents the initial gas emission rate from the coal wall, and α represents the gas release attenuation factor from the coal wall.

[0083] Furthermore, in one possible implementation of this application embodiment, the basic parameters of the tunneling face include the coal seam thickness, the tunneling face roadway height, and the coal cutting advance per single cycle of the tunneling face, and the method includes:

[0084] Based on the basic parameters of the tunneling face, A0 is obtained through the first formula, which is expressed as follows:

[0085] A0=πR0 2 ∫sinθdθ

[0086]

[0087] Where M is the coal seam thickness, h is the roadway height of the tunneling face, and d is the coal cutting advance in a single cycle of the tunneling face.

[0088] Furthermore, in one possible implementation of this application embodiment, the basic parameters of the tunneling face also include the total exposure time of the tunneling roadway, and the data processing module 502 is specifically used for:

[0089] The average exposed area within the exposure time range of the tunneling roadway is obtained through the second formula, which is expressed as follows:

[0090] S=2χx0h

[0091] Where x0 is the equivalent average advance within time t1; h is the height of the tunnel face; χ is the coal seam thickness related factor, if M>h then χ>1, otherwise χ=1.

[0092] Furthermore, in one possible implementation of this application embodiment, the basic parameters of the tunneling face also include the width of the tunneling face roadway, and the basic parameters of the coal seam gas include the gas emission data of the tunneling face when the tunneling face stops working. The data processing module 502 is specifically used for:

[0093] Based on the gas emission data of the tunneling face when it stops working, the initial gas emission rate q0 and the gas release attenuation factor α of the coal face are obtained by fitting using the third or fourth formula. The third formula is expressed as follows:

[0094]

[0095] Where, q t The gas flow rate per unit area of ​​the coal face within time t is obtained from the gas emission data of the tunneling face when it stops working.

[0096] The fourth formula is expressed as follows:

[0097]

[0098] Where S' is the face area, S'=S+ch, S is the average exposed area within the exposure time range of the tunnel, and c is the width of the tunnel face.

[0099] Furthermore, in one possible implementation of this application embodiment, the basic parameters of the tunneling face also include coal density and coal packing unevenness coefficient, and the basic parameters of coal seam gas also include the gas emission volume of the tunneling face during the last work cycle of the day. The data processing module 502 is specifically used for:

[0100] Based on the basic parameters of the tunneling face and the gas emission rate of the tunneling face during the last working cycle of the day, the initial emission rate q0' and the gas emission attenuation coefficient β of the coal-fired gas are obtained by fitting using the fifth formula, which is expressed as follows:

[0101] Qt=Xq0'e -βt2

[0102] X=kdchγ

[0103] Where Qt is the gas emission from the tunneling face during the last work cycle of the day, k is the coal body unevenness coefficient, c is the tunnel width of the tunneling face, γ is the coal density, h is the tunnel height of the tunneling face, and d is the coal cutting advance in a single cycle of the tunneling face.

[0104] Furthermore, in one possible implementation of this application embodiment, the data processing module 502 is further configured to:

[0105] Based on the coal seam gas pressure at the tunneling face and the mapping relationship between gas pressure and coal seam gas content, the coal seam gas content is calculated in reverse.

[0106] The gas content of the coal seam was compared with the measured gas content of the coal seam, and the verification results of the calculation model for the gas pressure of the coal seam inversion from the gas outburst at the tunneling face were obtained based on the comparison results.

[0107] It should be noted that the explanation of the aforementioned method embodiment for real-time monitoring of gas pressure in front of the coal seam tunneling face also applies to the real-time monitoring device for gas pressure in front of the coal seam tunneling face in this embodiment, and will not be repeated here.

[0108] To implement the above embodiments, this application also proposes an electronic device. Please see [link to relevant documentation]. Figure 6 , Figure 6 This is a schematic diagram of the structure of the electronic device provided in an embodiment of this application. For example... Figure 6 As shown, the electronic device 600 includes: a processor 601, and a memory 602 communicatively connected to the processor 601; the memory 602 stores computer-executable instructions; the processor 601 executes the computer-executable instructions stored in the memory to implement the method provided in the foregoing embodiments.

[0109] To implement the above embodiments, this application also proposes a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the methods provided in the foregoing embodiments.

[0110] To implement the above embodiments, this application also proposes a computer program product, including a computer program that, when executed by a processor, implements the methods provided in the foregoing embodiments.

[0111] In the foregoing descriptions of the embodiments, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0112] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0113] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0114] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for real-time monitoring of gas pressure ahead of a coal seam tunneling face, characterized in that, Includes the following steps: Obtain basic parameters of the tunneling face; Obtain basic parameters of coal seam gas during tunneling; Based on the basic parameters of the tunneling face and the basic parameters of the gas in the tunneling coal seam, the coal wall gas release attenuation factor and the coal falling gas emission attenuation coefficient are obtained. Based on the basic parameters of the tunneling face, the basic parameters of the gas in the tunneling coal seam, the gas release attenuation factor of the coal wall and the gas emission attenuation coefficient of the falling coal, and combined with the calculation model of the gas emission inversion of the tunneling face to calculate the gas pressure of the coal seam, the gas pressure of the tunneling face is obtained. The calculation model for inverting coal seam gas pressure from gas outburst at the tunneling face is expressed as follows: in, For coal seam gas pressure, Atmospheric pressure; and These are the boundary radii of the coal seam gas pressure seepage field and the boundary radii of the atmospheric pressure seepage field, respectively. The number of tunneling cycles per day; radius Surface area of ​​a sphere; The coal seam permeability coefficient; Let Q be the gas emission rate at the newly exposed face during tunneling, and let Q be the total gas emission rate at the tunneling face. This refers to the amount of gas emitted from the coal walls on both sides of the tunnel face. This refers to the amount of gas emitted during coal cutting at the tunnel face; t 2. Average residence time of coal in each cycle process. q 0' represents the initial emission rate of gas from the falling coal. β The attenuation coefficient of gas emission from coal pulverization is given. X This refers to the coal accumulation height during a single cycle of the process. S The average exposed area within the exposure time range of the tunnel. t 1 represents the total exposure time of the tunnel. The initial gas outburst rate from the coal face. The attenuation factor for gas release from the coal wall; The basic parameters of the tunneling face include coal seam thickness, tunnel height, and coal cutting progress in a single cycle. The method includes: Based on the basic parameters of the tunneling face, the following can be obtained through the first formula: The first formula is expressed as follows: Where M is the coal seam thickness, h is the roadway height of the tunneling face, and d is the coal cutting advance in a single cycle of the tunneling face; The basic parameters of the tunneling face also include the total exposure time of the tunneling roadway, and the method includes: The average exposed area S within the exposure time range of the tunneling roadway is obtained by the second formula, which is expressed as follows: in, x 0 is t Equivalent average advance within 1 time period; For factors related to coal seam thickness, if M > h, then >1, otherwise =1.

2. The method according to claim 1, characterized in that, The basic parameters of the tunneling face also include the width of the tunneling face roadway, and the basic parameters of the coal seam gas include the gas emission data of the tunneling face when it stops working. The step of obtaining the coal wall gas release attenuation factor based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas includes: Based on the gas emission data of the tunneling face when it stops working, the initial gas emission rate of the coal wall is obtained by fitting using the third or fourth formula. and the coal wall gas release attenuation factor The third formula is expressed as follows: in, The gas flow rate per unit area of ​​the coal face within time t is obtained from the gas emission data of the tunneling face when it stops working. The fourth formula is expressed as follows: in, For the frontal surface area, S' = S +ch, where c is the width of the tunnel at the working face.

3. The method according to claim 2, characterized in that, The basic parameters of the tunneling face also include coal density and coal packing unevenness coefficient; the basic parameters of the tunneling coal seam gas also include the gas emission rate of the tunneling face during the last work cycle of the day; and the process of obtaining the coal-falling gas emission attenuation coefficient based on the basic parameters of the tunneling face and the basic parameters of the tunneling coal seam includes: Based on the basic parameters of the tunneling face and the gas emission rate of the tunneling face during the last work cycle of the day, the initial gas emission rate of the coal-bearing gas is obtained by fitting using the fifth formula. q 0' and the coal gas emission attenuation coefficient β The fifth formula is expressed as follows: in, The value represents the gas emission rate at the tunneling face during the last work cycle of the day, and k is the coefficient of coal mass unevenness. This represents the density of the coal body.

4. The method according to claim 2, characterized in that, After obtaining the gas pressure of the coal seam at the tunneling face, the following is included: Based on the gas pressure of the coal seam at the tunneling face and the mapping relationship between the gas pressure and the gas content of the coal seam, the gas content of the coal seam is calculated in reverse. The gas content of the coal seam is compared with the measured gas content of the coal seam, and the verification results of the calculation model for the gas outburst inversion of the coal seam gas pressure at the tunneling face are obtained based on the comparison results.

5. A real-time monitoring device for gas pressure ahead of a coal seam tunneling face, characterized in that, The apparatus implements the method as described in claim 1, the apparatus comprising: The data acquisition module is used to acquire basic parameters of the tunneling face; The data acquisition module is used to acquire basic parameters of gas in the tunneling coal seam; The data processing module is used to obtain the coal wall gas release attenuation factor and the coal-falling gas emission attenuation coefficient based on the basic parameters of the tunneling face and the basic parameters of the coal seam gas. The data processing module is used to obtain the coal seam gas pressure of the tunneling face based on the basic parameters of the tunneling face, the basic parameters of the tunneling coal seam gas, the coal wall gas release attenuation factor and the coal falling gas emission attenuation coefficient, combined with the calculation model of coal seam gas pressure inversion from the tunneling face gas emission.

6. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-4.

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