Method for determining forepoling strength of mining roadway of coal face

Abstract

The invention discloses a coal face mining roadway advance support strength determination method, which belongs to the technical field of coal mine roadway support, and comprises the following steps: obtaining characteristic data of a mining roadway, and generating a mining roadway characteristic evaluation value; judging whether the state of the mining roadway is abnormal or not according to the mining roadway characteristic evaluation value; if the state of the mining roadway is abnormal, roof rock sample data and a roof rock sample fracture surface inclination angle factor are obtained, and a maximum advance support strength demand value is generated; obtaining a support inclination angle influence factor of the support facility, and generating the estimated strength of the forepoling of the mining roadway; according to the method, the characteristic data of the mining roadway and the roof rock sample data of the mining roadway are analyzed to generate the pre-estimated value of the pre-support strength, so that the pre-support strength of the mining roadway of the coal face can be quickly pre-estimated, and the working efficiency of the pre-support of the mining roadway of the coal face is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mine roadway support, and particularly relates to a method for determining the advanced support strength of the goaf roadway in a coal mining face. Background Art

[0002] In the process of coal mining and excavation, the support system of the goaf roadway plays an important role in ensuring the safety of the working face and the smooth progress of the operation. Especially for the advanced support of the goaf roadway in the working face, the selection of its support strength is directly related to the stability of the roadway and the safety of miners.

[0003] Traditional methods for determining the advanced support strength often rely on workers' experience or cumbersome mechanical calculations, which not only increases the complexity of operation but also may lead to poor support effects due to inaccurate calculations, thus affecting the working efficiency of the advanced support of the goaf roadway in the coal mining face. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for determining the advanced support strength of the goaf roadway in a coal mining face, which solves the above problems.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for determining the advanced support strength of the goaf roadway in a coal mining face includes the following steps:

[0006] Step S10: Obtain the characteristic data of the goaf roadway and generate a characteristic evaluation value of the goaf roadway; wherein, the characteristic data includes the broken area of the roof rock of the goaf roadway, the mining depth of the goaf roadway, the deformation degree of the goaf roadway, and the groundwater level height value of the roof rock of the goaf roadway;

[0007] Step S20: Determine whether the state of the goaf roadway is abnormal according to the characteristic evaluation value of the goaf roadway;

[0008] Step S30: If the state of the goaf roadway is abnormal, obtain the roof rock sample data and the inclination angle factor of the fracture surface of the roof rock sample, establish an analysis model of the roof rock sample, and substitute the roof rock sampling data and the inclination angle factor of the fracture surface of the roof rock sample into the analysis model of the roof rock sample to generate the maximum required value of the advanced support strength; wherein, the roof rock sample data includes the weight of the roof rock sample and the volume of the roof rock sample;

[0009] Step S40: Obtain the influence factor of the support inclination angle of the support facility, establish an evaluation model of the advanced support strength of the goaf roadway, and generate the estimated strength of the advanced support of the goaf roadway by using the maximum required value of the advanced support strength, the characteristic evaluation value of the goaf roadway, and the influence factor of the support inclination angle of the support facility.

[0010] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0011] For a further technical solution, step S10 specifically includes the following steps:

[0012] Step S11: Obtain the broken area of the roof rock in the extraction roadway and generate a broken area evaluation value;

[0013] Step S12: Obtain the mining depth of the extraction roadway and generate a mining depth evaluation value;

[0014] Step S13: Obtain the deformation degree of the extraction roadway and generate a roof rock deformation degree evaluation value;

[0015] Step S14: Obtain the groundwater level height value of the roof rock in the extraction roadway and generate a roof rock groundwater level evaluation value;

[0016] Step S15: Generate an extraction roadway characteristic evaluation value according to the broken area evaluation value, the mining depth evaluation value, the roof rock deformation degree evaluation value, and the roof rock groundwater level evaluation value.

[0017] For a further technical solution, the specific generation method of the broken area evaluation value is as follows:

[0018] Obtain the broken area of the roof rock in the extraction roadway, perform a difference processing on the broken area of the roof rock in the extraction roadway and the total area of the roof rock surface to generate an area difference;

[0019] Perform a ratio processing on the area difference and the total area of the roof rock surface to generate a broken area evaluation value;

[0020] Among them, the specific generation method of the mining depth evaluation value is as follows:

[0021] Obtain the mining depth of the extraction roadway, perform a difference processing on the mining depth of the extraction roadway and the mining depth threshold to generate a mining depth difference;

[0022] Perform a ratio processing on the mining depth difference and the mining depth threshold to generate a mining depth evaluation value;

[0023] Among them, the specific generation method of the roof rock deformation degree evaluation value is as follows:

[0024] Obtain the deformation degree of the roof rock in the extraction roadway, perform a difference processing on the deformation degree of the roof rock in the extraction roadway and the deformation degree threshold to generate a deformation degree difference;

[0025] Perform a ratio processing on the deformation degree difference and the deformation degree threshold to generate a roof rock deformation degree evaluation value;

[0026] Among them, the specific generation method of the roof rock groundwater level evaluation value is as follows:

[0027] Obtain the groundwater level height value of the roof rock of the extraction roadway, perform a difference process on the groundwater level height value of the roof rock of the extraction roadway and the height value of the roof rock of the extraction roadway to generate a height difference;

[0028] Perform a ratio process on the height difference and the height value of the roof rock of the extraction roadway to generate an evaluation value of the groundwater level of the roof rock;

[0029] Among them, the generation method of the evaluation value of the characteristics of the extraction roadway is specifically as follows:

[0030] Generate the evaluation value Hp of the characteristics of the extraction roadway through the formula Hp = Mh*α + Lh*β + Xh*γ + Sh*δ;

[0031] In the formula, Mh represents the evaluation value of the broken area, Lh represents the evaluation value of the mining depth, Xh represents the evaluation value of the deformation degree of the roof rock, Sh represents the evaluation value of the groundwater level of the roof rock, and α, β, γ, and δ are all weight coefficients.

[0032] Further technical solution, the judgment method of the step S20 is specifically as follows:

[0033] Compare the evaluation value of the characteristics of the extraction roadway with the evaluation threshold of the characteristics of the extraction roadway;

[0034] If the evaluation value of the characteristics of the extraction roadway is greater than the evaluation threshold of the characteristics of the extraction roadway, it means that the greater the evaluation value of the characteristics of the extraction roadway, the worse the state of the extraction roadway, then it is determined that the state of the extraction roadway is abnormal.

[0035] Further technical solution, the step S30 specifically includes:

[0036] Step S31: If the state of the extraction roadway is abnormal, obtain the roof rock sample data; among them, the roof rock sampling data includes the weight of the roof rock sample, the volume of the roof rock sample, and the average hardness of the roof rock sample;

[0037] Step S32: Establish an analysis model of the roof rock sample, substitute the roof rock sample data into the analysis model of the roof rock sample, and generate the maximum demand value of the advanced support strength.

[0038] Further technical solution, the expression of the analysis model of the roof rock sample is:

[0039]

[0040] In the expression, Fc max represents the maximum demand value of the advanced support strength, G represents the weight of the roof rock sample, V1 represents the volume of the roof rock sample, V0 represents the total volume of the roof rock, and θ represents the inclination angle factor of the sample fracture surface.

[0041] Further technical solution, the specific method for obtaining the inclination angle factor of the fracture surface of the roof rock sample is as follows:

[0042] Obtain the inclination angle of the fracture surface of the roof rock sample, perform a difference operation on the inclination angle of the fracture surface of the roof rock sample and the maximum value of the inclination angle of the fracture surface of the theoretical roof rock sample to generate an inclination angle difference; the inclination angle of the fracture surface of the roof rock sample refers to the included angle formed by the fracture surface of the roof rock sample and the horizontal plane;

[0043] Perform a ratio operation on the inclination angle difference and the maximum value of the inclination angle of the fracture surface of the theoretical roof rock sample to generate the inclination angle factor of the fracture surface of the roof rock sample.

[0044] Further technical solution, the step S40 specifically includes the following steps:

[0045] Step S41: Obtain the support inclination angle of the support facility to generate the influence factor of the support inclination angle of the support facility; the support inclination angle of the support facility refers to the included angle formed by the support facility and the ground vertical plane; the ground vertical plane refers to the plane perpendicular to the ground plane;

[0046] It should be noted that the support inclination angle of the support facility is the estimated placement angle according to the specific terrain where the support facility is placed;

[0047] Step S42: Establish an evaluation model for the advanced support strength of the extraction roadway, and generate the estimated strength of the advanced support of the extraction roadway by using the maximum required value of the advanced support strength, the evaluation value of the extraction roadway characteristics, and the influence factor of the support inclination angle of the support facility.

[0048] Further technical solution, the expression of the evaluation model for the advanced support strength of the extraction roadway is:

[0049]

[0050] In the expression, Fc i represents the estimated strength of the advanced support of the extraction roadway, Fc max represents the maximum required value of the advanced support strength, Hp represents the evaluation value of the extraction roadway characteristics, and Zj represents the influence factor of the support inclination angle of the support facility.

[0051] Further technical solution, the specific method for generating the influence factor of the support inclination angle of the support facility is as follows:

[0052] Perform a summation operation on the support inclination angle of the support facility and the inclination angle of the fracture surface of the roof rock sample to generate a total angle value;

[0053] Perform a difference operation on the total angle value and the angle formed by the ground vertical plane and the horizontal plane to generate a total angle difference;

[0054] Perform a ratio operation on the total angle difference and the angle formed by the ground vertical plane and the horizontal plane to generate a support inclination angle influence factor of the support facility.

[0055] The present invention provides a method for determining the advanced support strength of the extraction roadway in the coal mining face, which has the following beneficial effects compared with the prior art:

[0056] The present invention analyzes the characteristic data of the extraction roadway to judge the state of the extraction roadway. If the state of the extraction roadway is abnormal, the maximum required value of the advanced support strength is analyzed according to the roof rock sample data of the extraction roadway, and then the predicted value of the advanced support strength is generated according to the maximum required value of the advanced support strength. This method can quickly predict the advanced support strength of the extraction roadway in the coal mining face and improve the working efficiency of the advanced support of the extraction roadway in the coal mining face. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a flow chart of a method for determining the advanced support strength of the extraction roadway in the coal mining face provided by the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0058] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0059] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0060] Please refer to Figure 1 , a method for determining the advanced support strength of the extraction roadway in the coal mining face provided by an embodiment of the present invention, includes the following steps:

[0061] Step S10: Obtain the characteristic data of the extraction roadway to generate a characteristic evaluation value of the extraction roadway; wherein, the characteristic data includes the broken area of the roof rock of the extraction roadway, the mining depth of the extraction roadway, the deformation degree of the extraction roadway, and the groundwater level height value of the roof rock of the extraction roadway;

[0062] Step S20: Judge whether the state of the extraction roadway is abnormal according to the characteristic evaluation value of the extraction roadway;

[0063] Step S30: If the state of the extraction roadway is abnormal, obtain the data of the roof rock sample and the inclination angle factor of the fracture surface of the roof rock sample, establish an analysis model for the roof rock sample, substitute the roof rock sampling data and the inclination angle factor of the fracture surface of the roof rock sample into the analysis model for the roof rock sample to generate the maximum required value of the advanced support strength; wherein, the roof rock sample data includes the weight of the roof rock sample and the volume of the roof rock sample.

[0064] Step S40: Obtain the influence factor of the support inclination angle of the support facility, establish an evaluation model for the advanced support strength of the extraction roadway, and generate the estimated strength of the advanced support of the extraction roadway by using the maximum required value of the advanced support strength, the evaluation value of the characteristics of the extraction roadway, and the influence factor of the support inclination angle of the support facility.

[0065] As a preferred embodiment of the present invention, step S10 specifically includes the following steps:

[0066] Step S11: Obtain the broken area of the roof rock of the extraction roadway and generate an evaluation value of the broken area.

[0067] Step S12: Obtain the mining depth of the extraction roadway and generate an evaluation value of the mining depth.

[0068] Step S13: Obtain the deformation degree of the extraction roadway and generate an evaluation value of the deformation degree of the roof rock.

[0069] Step S14: Obtain the groundwater level height value of the roof rock of the extraction roadway and generate an evaluation value of the groundwater level of the roof rock.

[0070] Step S15: Generate an evaluation value of the characteristics of the extraction roadway according to the evaluation value of the broken area, the evaluation value of the mining depth, the evaluation value of the deformation degree of the roof rock, and the evaluation value of the groundwater level of the roof rock.

[0071] As a preferred embodiment of the present invention, the generation method of the evaluation value of the broken area is specifically as follows:

[0072] Obtain the broken area of the roof rock of the extraction roadway, perform a difference process on the broken area of the roof rock of the extraction roadway and the total area of the roof rock surface to generate an area difference.

[0073] Perform a ratio process on the area difference and the total area of the roof rock surface to generate an evaluation value of the broken area.

[0074] As a preferred embodiment of the present invention, the generation method of the evaluation value of the mining depth is specifically as follows:

[0075] Obtain the mining depth of the extraction roadway, perform a difference process on the mining depth of the extraction roadway and the mining depth threshold to generate a mining depth difference.

[0076] The difference in mining depth is processed by taking the ratio with the mining depth threshold to generate a mining depth evaluation value.

[0077] As a preferred embodiment of the present invention, the generation method of the evaluation value of the roof rock deformation degree is specifically as follows:

[0078] Obtain the deformation degree of the roof rock in the extraction roadway, and perform a difference process on the deformation degree of the roof rock in the extraction roadway and the deformation degree threshold to generate a deformation degree difference;

[0079] Perform a ratio process on the deformation degree difference and the deformation degree threshold to generate an evaluation value of the roof rock deformation degree.

[0080] As a preferred embodiment of the present invention, the generation method of the evaluation value of the groundwater level of the roof rock is specifically as follows:

[0081] Obtain the groundwater level height value of the roof rock in the extraction roadway, and perform a difference process on the groundwater level height value of the roof rock in the extraction roadway and the height value of the roof rock in the extraction roadway to generate a height difference;

[0082] Perform a ratio process on the height difference and the height value of the roof rock in the extraction roadway to generate an evaluation value of the groundwater level of the roof rock.

[0083] As a preferred embodiment of the present invention, the generation method of the evaluation value of the extraction roadway characteristics is specifically as follows:

[0084] Perform a weighted process on the evaluation value of the broken area, the evaluation value of the mining depth, the evaluation value of the roof rock deformation degree, and the evaluation value of the groundwater level of the roof rock to generate an evaluation value of the extraction roadway characteristics;

[0085] Exemplarily, the evaluation value Hp of the extraction roadway characteristics is generated through the formula Hp = Mh * α + Lh * β + Xh * γ + Sh * δ;

[0086] In the formula, Mh represents the evaluation value of the broken area, Lh represents the evaluation value of the mining depth, Xh represents the evaluation value of the roof rock deformation degree, Sh represents the evaluation value of the groundwater level of the roof rock, and α, β, γ, and δ are all weight coefficients.

[0087] As a preferred embodiment of the present invention, the judgment method of step S20 is specifically as follows:

[0088] Compare the evaluation value of the extraction roadway characteristics with the evaluation threshold of the extraction roadway characteristics;

[0089] It should be explained that the acquisition method of the evaluation threshold of the extraction roadway characteristics is the same as the acquisition method of the evaluation value of the extraction roadway characteristics, which will not be elaborated here; in addition, the value of the evaluation threshold of the extraction roadway characteristics is set by relevant personnel in the field;

[0090] If the evaluation value of the characteristics of the extraction roadway is less than or equal to the evaluation threshold of the characteristics of the extraction roadway, it indicates that the smaller the evaluation value of the characteristics of the extraction roadway, the better the state of the extraction roadway, and it is determined that the state of the extraction roadway is normal;

[0091] If the evaluation value of the characteristics of the extraction roadway is greater than the evaluation threshold of the characteristics of the extraction roadway, it indicates that the larger the evaluation value of the characteristics of the extraction roadway, the worse the state of the extraction roadway, and it is determined that the state of the extraction roadway is abnormal.

[0092] As a preferred embodiment of the present invention, the step S30 specifically includes:

[0093] Step S31: If the state of the extraction roadway is abnormal, obtain the roof rock sample data; wherein, the roof rock sampling data includes the weight of the roof rock sample, the volume of the roof rock sample, and the average hardness of the roof rock sample;

[0094] Step S32: Establish a roof rock sample analysis model, substitute the roof rock sample data into the roof rock sample analysis model, and generate the maximum demand value of the advanced support strength.

[0095] As a preferred embodiment of the present invention, the expression of the roof rock sample analysis model is:

[0096]

[0097] In the expression, Fc max represents the maximum demand value of the advanced support strength, G represents the weight of the roof rock sample, V1 represents the volume of the roof rock sample, V0 represents the total volume of the roof rock, and θ represents the inclination angle factor of the sample fracture surface.

[0098] As a preferred embodiment of the present invention, the acquisition method of the inclination angle factor of the roof rock sample fracture surface is specifically:

[0099] Obtain the inclination angle of the sample fracture surface of the roof rock, perform a difference process on the inclination angle of the sample fracture surface of the roof rock and the maximum value of the inclination angle of the sample fracture surface of the theoretical roof rock to generate an inclination angle difference; the inclination angle of the roof rock sample fracture surface refers to the included angle formed by the roof rock sample fracture surface and the horizontal plane;

[0100] Perform a ratio process on the inclination angle difference and the maximum value of the inclination angle of the sample fracture surface of the theoretical roof rock to generate the inclination angle factor of the roof rock sample fracture surface;

[0101] It should be noted that when obtaining the inclination angle of the fracture surface of the roof rock sample, the placement angle of the roof rock sample needs to be consistent with the spatial angle before sampling; in addition, the maximum value of the inclination angle of the fracture surface of the theoretical roof rock sample is generally 90°, and the reason for taking the value of 90° is as follows: if the inclination angle exceeds 90°, it means that the inclination direction has changed, and subtracting 90° gives the inclination angle in the other inclination direction.

[0102] As a preferred embodiment of the present invention, step S40 specifically includes the following steps:

[0103] Step S41: Obtain the support inclination angle of the support facility and generate the support inclination angle influence factor of the support facility; the support inclination angle of the support facility refers to the included angle formed by the support facility and the ground vertical plane; the ground vertical plane refers to the plane perpendicular to the ground plane;

[0104] It should be explained that the support inclination angle of the support facility is the estimated placement angle according to the specific terrain where the support facility is placed;

[0105] Step S42: Establish an evaluation model for the advanced support strength of the mining roadway, and generate the estimated strength of the advanced support of the mining roadway from the maximum required value of the advanced support strength, the evaluation value of the mining roadway characteristics, and the support inclination angle influence factor of the support facility;

[0106] Among them, the expression of the evaluation model for the advanced support strength of the mining roadway is:

[0107]

[0108] In the expression, Fc i represents the estimated strength of the advanced support of the mining roadway, Fc max represents the maximum required value of the advanced support strength, Hp represents the evaluation value of the mining roadway characteristics, and Zj represents the support inclination angle influence factor of the support facility.

[0109] As a preferred embodiment of the present invention, the generation method of the support inclination angle influence factor of the support facility is specifically as follows:

[0110] Sum the support inclination angle of the support facility and the inclination angle of the fracture surface of the roof rock sample to generate a total angle value;

[0111] Take the difference between the total angle value and the included angle formed by the ground vertical plane and the horizontal plane to generate a total angle difference;

[0112] Take the ratio of the total angle difference to the included angle formed by the ground vertical plane and the horizontal plane to generate the support inclination angle influence factor of the support facility.

[0113] The present invention analyzes the characteristic data of the extraction roadway to judge the state of the extraction roadway. If the state of the extraction roadway is abnormal, the maximum required value of the advanced support strength is analyzed based on the roof rock sample data of the extraction roadway, and then an estimated value of the advanced support strength is generated according to the maximum required value of the advanced support strength. This method can quickly estimate the advanced support strength of the extraction roadway in the coal mining face, improving the working efficiency of the advanced support for the extraction roadway in the coal mining face.

[0114] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for determining the strength of advance support for a mining tunnel in a coal mining face, characterized in that: The following steps are involved: Step S10: Acquire characteristic data of the mining tunnel and generate a mining tunnel characteristic evaluation value; wherein the characteristic data includes the rock crushing area of ​​the mining tunnel roof, the mining depth of the mining tunnel, the deformation degree of the mining tunnel and the groundwater level value of the mining tunnel roof rock; Step S20: judging whether the state of the mining tunnel is abnormal according to the mining tunnel characteristic evaluation value; Step S30: If the state of the mining tunnel is abnormal, obtain the roof rock sample data and the roof rock sample fracture surface inclination angle factor, establish a roof rock sample analysis model, substitute the roof rock sampling data and the roof rock sample fracture surface inclination angle factor into the roof rock sample analysis model, and generate the maximum required value of the advance support strength; wherein the roof rock sample data includes the weight of the roof rock sample and the volume of the roof rock sample; Step S40: Obtain the influencing factor of the support inclination angle of the support facility, establish an assessment model for the advance support strength of the mining tunnel, and generate an estimated strength of the advance support of the mining tunnel by combining the maximum demand value of the advance support strength, the mining tunnel characteristic assessment value and the influencing factor of the support inclination angle of the support facility.

2. A method for determining the strength of advance support of a coal mining working face mining tunnel according to claim 1, characterized in that: The step S10 specifically includes the following steps: Step S11: obtaining the rock crushing area of ​​the mining tunnel roof and generating a crushing area assessment value; Step S12: obtaining the mining depth of the mining tunnel and generating a mining depth assessment value; Step S13: Obtain the deformation degree of the mining tunnel and generate an evaluation value of the deformation degree of the roof rock; Step S14: obtaining the groundwater level value of the roof rock of the mining tunnel and generating an assessment value of the groundwater level of the roof rock; Step S15: Generate a mining tunnel characteristic evaluation value based on the crushing area evaluation value, the mining depth evaluation value, the roof rock deformation degree evaluation value and the roof rock groundwater level evaluation value.

3. A method for determining the strength of advance support of a coal mining working face mining tunnel according to claim 2, characterized in that: The method for generating the broken area assessment value is specifically as follows: Obtain the broken area of ​​the roof rock of the mining tunnel, perform difference processing on the broken area of ​​the roof rock of the mining tunnel and the total area of ​​the roof rock surface to generate an area difference; The area difference is processed by ratioing the total area of ​​the roof rock surface to generate a crushing area assessment value; The mining depth assessment value is generated in the following manner: Obtain the mining depth of the mining tunnel, perform difference processing on the mining depth of the mining tunnel and the mining depth threshold, and generate a mining depth difference; The mining depth difference is compared with the mining depth threshold to generate a mining depth assessment value; The method for generating the roof rock deformation degree assessment value is specifically as follows: Obtaining the deformation degree of the rock on the roof of the mining tunnel, performing difference processing on the deformation degree of the rock on the roof of the mining tunnel and the deformation degree threshold, and generating a deformation degree difference; The deformation degree difference is processed by ratio with the deformation degree threshold to generate the roof rock deformation degree assessment value; The method for generating the top rock groundwater level assessment value is specifically as follows: Obtain the groundwater level height value of the top rock of the mining roadway, perform difference processing on the groundwater level height value of the top rock of the mining roadway and the rock height value of the top rock of the mining roadway to generate a height difference value; The height difference is compared with the height of the roof rock of the mining roadway to generate an assessment value of the groundwater level of the roof rock; The method for generating the mining tunnel characteristic evaluation value is specifically as follows: The mining tunnel characteristic evaluation value Hp is generated by the formula Hp=Mh*α+Lh*β+Xh*γ+Sh*δ; In the formula, Mh represents the assessed value of the crushing area, Lh represents the assessed value of the mining depth, Xh represents the assessed value of the degree of deformation of the roof rock, Sh represents the assessed value of the groundwater level of the roof rock, and α, β, γ, and δ are all weight coefficients.

4. A method for determining the strength of advance support of a coal mining working face mining tunnel according to claim 2, characterized in that: The determination method of step S20 is specifically as follows: comparing the mining roadway characteristic evaluation value with the mining roadway characteristic evaluation threshold; If the mining roadway characteristic evaluation value is greater than the mining roadway characteristic evaluation threshold, it means that the larger the mining roadway characteristic evaluation value is, the worse the state of the mining roadway is, and the state of the mining roadway is determined to be abnormal.

5. A method for determining the strength of advance support of a coal mining working face mining tunnel according to claim 1, characterized in that: The step S30 specifically includes: Step S31: if the state of the mining tunnel is abnormal, obtain roof rock sample data; wherein the roof rock sampling data includes the weight of the roof rock sample, the volume of the roof rock sample and the average hardness of the roof rock sample; Step S32: Establish a roof rock sample analysis model, substitute the roof rock sample data into the roof rock sample analysis model, and generate the maximum required value of the advance support strength.

6. A method for determining the strength of advance support for a coal mining working face mining tunnel according to claim 5, characterized in that: The expression of the roof rock sample analysis model is: In the expression, Fc max It represents the maximum required value of the advance support strength, G represents the weight of the roof rock sample, V1 represents the volume of the roof rock sample, V0 represents the total volume of the roof rock, and θ represents the inclination angle factor of the sample fracture surface.

7. A method for determining the strength of advance support for a coal mining face mining tunnel according to claim 5, characterized in that: The method for obtaining the inclination angle factor of the fracture surface of the roof rock sample is specifically as follows: Obtain the inclination angle of the sample fracture surface of the roof rock, perform difference processing on the inclination angle of the sample fracture surface of the roof rock and the maximum value of the theoretical inclination angle of the sample fracture surface of the roof rock, and generate an inclination angle difference; the inclination angle of the sample fracture surface of the roof rock refers to the angle formed by the fracture surface of the sample fracture surface of the roof rock and the horizontal plane; The inclination angle difference is compared with the maximum value of the inclination angle of the theoretical roof rock sample fracture surface to generate the inclination angle factor of the roof rock sample fracture surface.

8. A method for determining the strength of advance support for a coal mining working face mining tunnel according to claim 1, characterized in that: The step S40 specifically includes the following steps: Step S41: obtaining the support inclination angle of the support facility and generating the support inclination angle influencing factor of the support facility; the support inclination angle of the support facility refers to the angle formed by the support facility and the vertical plane of the ground; the vertical plane of the ground refers to the plane perpendicular to the ground plane; It should be explained that the support inclination angle of the support facility is the placement angle estimated based on the terrain where the support facility is specifically placed; Step S42: Establish a mining tunnel advance support strength assessment model, and generate an estimated strength of the mining tunnel advance support by taking into account the maximum demand value of the advance support strength, the mining tunnel characteristic assessment value, and the support inclination angle influencing factor of the support facility.

9. A method for determining the strength of advance support for a coal mining working face mining tunnel according to claim 8, characterized in that: The expression of the advance support strength evaluation model of the mining tunnel is: In the expression, Fc i It represents the estimated strength of the advance support of the mining tunnel, Fc max It represents the maximum required value of the advance support strength, Hp represents the characteristic evaluation value of the mining tunnel, and Zj represents the influencing factor of the support inclination angle of the support facility.

10. A method for determining the strength of advance support for a coal mining working face mining tunnel according to claim 8, characterized in that: The generation method of the influencing factor of the support inclination angle of the support facility is specifically as follows: The support inclination angle of the support facility and the inclination angle of the fracture surface of the roof rock sample are summed to generate a total angle value; Perform difference processing on the total angle value and the angle formed by the vertical plane and the horizontal plane of the ground to generate a total angle difference; The total angle difference is ratioed with the angle formed by the vertical plane and the horizontal plane of the ground to generate the support inclination angle influencing factor of the support facility.

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