Coal geological range detection method based on physical electrical method detection

Abstract

The invention relates to the technical field of electrical method detection, and particularly discloses a coal geological range detection method based on physical electrical method detection, and the method comprises the steps: collecting geological data related to an exploration region, including a geological map, a stratum profile map and a geological structure map, and analyzing the power utilization state of electrical method detection equipment; the method can reflect whether the power supply of the electrical method detection equipment is stable or not, ensures that the electrical method detection equipment has good and stable power supply capability, and then can analyze the influence of the geological features of the exploration area on the discharge capacity by carrying out multiple electrical method detection tests on the exploration point, i.e., when the electrical method exploration operation is carried out in the current area, the influence of the geological features on the discharge capacity can be analyzed. And then the preset discharge capacity is corrected by combining the two groups of data, so that the situation that the preset discharge capacity is lost in the detection process, the detection depth of the electrical method is limited, and the data accuracy is reduced can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of electrical detection, and in particular to a method for detecting coal geological range based on physical electrical detection. Background Art

[0002] Coal geological range detection methods based on physical electrical detection mainly rely on the electromagnetic properties or electrochemical characteristics of underground materials such as the electrical properties of rocks and ore bodies. These methods infer detailed data of underground rock formations by analyzing and studying the distribution patterns and time characteristics of natural or artificial electromagnetic fields.

[0003] Traditional physical electrical detection methods include direct current measurement, electromagnetic frequency sounding, high-density electrical method and transient electromagnetic method. The most common of these is direct current measurement. By arranging electrodes on the surface, supplying direct current to the underground, and observing the resistivity changes of rock strata at different depths, the distribution, thickness and other information of underground coal seams can be inferred. This method has been widely used in coal geological exploration, especially in understanding the distribution range, thickness, burial depth and other aspects of coal-bearing strata and other strata under the overburden.

[0004] When using the common direct current measurement method in the prior art, in order to avoid current leakage and electromagnetic interference caused by excessive discharge, the discharge amount is estimated according to the range to be detected. However, due to the influence of environmental factors such as topography and geological structure, the current will be lost during the detection process. If the discharge amount cannot be corrected, the detection depth will be limited, resulting in a decrease in data accuracy, thereby affecting the accuracy of the coal geological range detection results. Summary of the invention

[0005] The purpose of the present invention is to provide a coal geological range detection method based on physical electrical detection to solve the following technical problems:

[0006] How to improve the accuracy of coal geological range detection results.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A method for coal geological range detection based on physical electrical detection, the method comprising:

[0009] S1: Collect geological data on the exploration area, including geological maps, stratigraphic sections and geological structure maps;

[0010] S2: Perform a discharge test on the electrical detection equipment and analyze the power usage status of the electrical detection equipment based on the data of the discharge test;

[0011] S3: Select appropriate exploration points in the exploration area according to the exploration plan and geological data, and ensure that the exploration points reflect the geological characteristics of the entire exploration area;

[0012] S4: Conduct multiple electrical detection tests on the exploration points using electrical detection equipment, and analyze the impact of the geological characteristics of the exploration area on the discharge amount based on the data from the electrical detection tests;

[0013] S5: By combining the analysis results of the influence of geological characteristics of the exploration area on the discharge amount with the status analysis results of the electrical equipment, the preset discharge amount of the electrical detection equipment is corrected;

[0014] S6: After the discharge amount correction is completed, the electrodes are rearranged on the surface to supply direct current to the underground. By observing the resistivity changes of the rock layers at different depths, the distribution and thickness of the underground coal seams are analyzed.

[0015] Furthermore, the process of analyzing the state of the electrical detection equipment in S2 includes:

[0016] By formula Calculate the power consumption status influence coefficient of electrical detection equipment

[0017] Where i is a data collection time point at a fixed time interval during the discharge test of the electrical detection equipment, n is the total number of data collection times during the discharge test of the electrical detection equipment, and dl i is the current magnitude at the i-th time point during the discharge test of the electrical detection equipment, dl y is the preset current size, For all dl i The average value of dy i is the voltage at the i-th time point during the discharge test of the electrical detection equipment, dy y is the preset voltage size, For all i The average value of .

[0018] Furthermore, the process of analyzing the state of the electrical detection device in S2 further includes:

[0019] By using the electrical method to detect the power consumption status of the equipment, the influence coefficient The influence coefficient threshold is set Make a comparison;

[0020] like Determine whether the current power consumption status of the electrical detection equipment is affected;

[0021] like It is determined that the current power usage status of the electrical detection equipment is not affected.

[0022] Furthermore, the process of analyzing the state of the electrical detection device in S2 further includes:

[0023] When it is determined that the current power usage status of the electrical detection equipment is affected, the subsequent electrical detection test operations on the exploration point are stopped, the electrical detection equipment is calibrated, and a secondary test is performed after calibration until the value of the power usage status impact coefficient of the electrical detection equipment is less than the preset impact coefficient threshold.

[0024] Furthermore, the process of analyzing the influence of geological characteristics of the exploration area on the discharge capacity in S4 includes:

[0025] By observing the change of apparent resistivity with depth, the diffusion depth range of current at different depths underground is inferred, and the diffusion area change curve θ(t) of current at different depths is established;

[0026] By formula Calculate the discharge current loss index ω during the ath electrical detection test a ;

[0027] And through the formula Calculate and obtain the average current loss index ω of the electrical detection test at the current exploration point;

[0028] Where a is any electrical detection test, b is the total number of electrical detection tests, γ a is the error influence coefficient of the a-th electrical detection test, which is set according to empirical fitting, jl a is the actual detection distance during the ath electrical detection test, jl y is the preset detection distance, c is a detection point at a fixed distance in the exploration area, d is the total number of detection points in the actual detection distance during the a-th electrical detection test, mj ac is the current diffusion area at the depth of the cth detection point in the ath electrical detection test, t1 is the first detection point at a fixed distance in the exploration area, t2 is the last detection point at a fixed distance in the exploration area, x1 and x2 are the first weight coefficients, which are set according to empirical fitting.

[0029] Furthermore, the process of analyzing the influence of geological characteristics of the exploration area on the discharge amount in S4 also includes:

[0030] The average current loss index ω of the electrical detection test at the current exploration point is compared with the preset current loss coefficient threshold ω 01 Make a comparison;

[0031] If ω ≥ ω 01, it is judged that the electrical detection is being used for detection at the current exploration point. When the output current moves deep underground, external factors seriously interfere with the current detection, resulting in the preset output current being unable to detect the target distance, and the preset discharge amount needs to be adjusted;

[0032] On the contrary, it is judged that electrical detection is being used for detection operations at the current exploration point. When the output current moves deep underground, external factors interfere slightly with the current detection. The preset output current can detect the target distance, and there is no need to adjust the preset discharge amount.

[0033] Furthermore, the process of correcting the preset discharge amount of the electrical detection device in S5 includes:

[0034] By formula Calculate and obtain the discharge amount μ after the electrical detection equipment is adjusted;

[0035] Among them, μ y is the preset discharge amount, f v To adjust the coefficient comparison table function, according to The influence of the value range on the discharge capacity is obtained based on the test, and y1 and y2 are the second weight coefficients, which are set according to empirical fitting.

[0036] Furthermore, the process of correcting the preset discharge amount of the electrical detection device in S5 also includes:

[0037] After obtaining the discharge volume μ adjusted by the electrical detection equipment, check the connection between the electrodes and the wires to ensure good contact and reduce human errors.

[0038] Beneficial effects of the present invention:

[0039] (1) The present invention first analyzes the power consumption status of the electrical detection equipment to reflect whether the power supply of the electrical detection equipment is stable, thereby ensuring that the electrical detection equipment has a good and stable power supply capacity. Then, by performing multiple electrical detection tests on the exploration points, the influence of the geological characteristics of the exploration area on the discharge amount can be analyzed, that is, how much power loss will occur when the electrical survey operation is carried out in the current area. Then, by combining the two sets of data to correct the preset discharge amount, it is possible to avoid the loss of the preset discharge amount during the detection process, resulting in a situation where the electrical detection depth is limited and the data accuracy is reduced.

[0040] (2) The present invention detects the power consumption status of the equipment by the electrical method. The influence coefficient threshold is set By comparing the data, an accurate judgment can be made on whether the current power usage status of the electrical detection equipment is affected, thereby avoiding the situation in which the electrical detection equipment is affected by the power usage status during the exploration process, resulting in unstable current output and current attenuation, and further leading to increased discharge loss, thereby improving the accuracy of coal geological detection results.

[0041] (3) The present invention compares the average current loss index ω of the electrical detection test at the current exploration point with the preset current loss coefficient threshold ω 01 By comparison, when electrical detection is used at the current exploration point, the severity of interference of external factors on current detection can be accurately judged, and it can be further judged whether the preset output current can detect the target distance, so as to decide whether the preset discharge amount needs to be adjusted, so as to avoid the loss of current during the detection process and the failure to adjust it in time, resulting in limited detection depth and reduced data accuracy, thereby improving the accuracy of coal geological detection results.

[0042] (4) The present invention can improve the accuracy of the correction result by combining two sets of data to correct the preset discharge amount, thereby ensuring that the corrected discharge amount can still reach the preset detection depth even if there is a loss during the exploration operation, avoiding the situation where the detection depth is limited and the data accuracy is reduced, and can avoid the situation where current leakage and electromagnetic interference caused by excessive electricity occur, thereby improving the accuracy of the coal geological range detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] Figure 1 It is a flow chart of a coal geological range detection method based on physical electrical detection in the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1 As shown, in one embodiment, the present application provides a method for coal geological range detection based on physical electrical detection, the method comprising:

[0047] S1: Collect geological data on the exploration area, including geological maps, stratigraphic sections and geological structure maps;

[0048] S2: Perform a discharge test on the electrical detection equipment and analyze the power usage status of the electrical detection equipment based on the data of the discharge test;

[0049] S3: Select appropriate exploration points in the exploration area according to the exploration plan and geological data, and ensure that the exploration points reflect the geological characteristics of the entire exploration area;

[0050] S4: Conduct multiple electrical detection tests on the exploration points using electrical detection equipment, and analyze the impact of the geological characteristics of the exploration area on the discharge amount based on the data from the electrical detection tests;

[0051] S5: By combining the analysis results of the influence of geological characteristics of the exploration area on the discharge amount with the status analysis results of the electrical equipment, the preset discharge amount of the electrical detection equipment is corrected;

[0052] S6: After the discharge amount correction is completed, the electrodes are re-arranged on the surface to supply direct current to the underground. By observing the resistivity changes of the rock layers at different depths, the distribution and thickness of the underground coal seams are analyzed;

[0053] Through the above technical scheme, this example provides a coal geological range detection method based on physical electrical detection, firstly, geological data of the exploration area are collected, including geological maps, stratigraphic profiles and geological structure maps, then the electrical detection equipment is subjected to a discharge test, and the power consumption status of the electrical detection equipment is analyzed in combination with the data of the discharge test, then suitable exploration points are selected in the exploration area according to the exploration plan and geological data, and it is ensured that the exploration points reflect the geological characteristics of the entire exploration area, then the exploration points are subjected to multiple electrical detection tests by the electrical detection equipment, and the influence of the geological characteristics of the exploration area on the discharge amount is analyzed in combination with the data of the electrical detection test, and the preset discharge amount of the electrical detection equipment is corrected by combining the analysis results of the influence of the geological characteristics of the exploration area on the discharge amount with the state analysis results of the power consumption equipment, and finally, after the discharge amount correction is completed, the electrodes are rearranged on the surface, direct current is supplied to the underground, and the distribution and thickness of the underground coal seam are analyzed by observing the resistivity changes of the rock layers at different depths;

[0054] With such a setting, when the method is used, by first analyzing the power consumption status of the electrical detection equipment, it can reflect whether the power supply of the electrical detection equipment is stable, and ensure that the electrical detection equipment has a good and stable power supply capacity. After that, by performing multiple electrical detection tests on the exploration points, the influence of the geological characteristics of the exploration area on the discharge amount can be analyzed, that is, how much power loss will occur when the electrical survey operation is carried out in the current area. After that, by combining the two sets of data to correct the preset discharge amount, it can be avoided that the preset discharge amount is lost during the detection process, resulting in the electrical detection depth being limited and the data accuracy being reduced.

[0055] The process of analyzing the state of the electrical detection equipment in S2 includes:

[0056] By formula Calculate the power consumption status influence coefficient of electrical detection equipment

[0057] Where i is a data collection time point at a fixed time interval during the discharge test of the electrical detection equipment, n is the total number of data collection times during the discharge test of the electrical detection equipment, and dl i is the current magnitude at the i-th time point during the discharge test of the electrical detection equipment, dl y is the preset current size, For all dl i The average value of dy i is the voltage at the i-th time point during the discharge test of the electrical detection equipment, dy y is the preset voltage size, For all i The average value of

[0058] Through the above technical solution, this example provides the power consumption status influence coefficient of the electrical detection equipment The formula Calculated, where and The discrete coefficients of current and voltage during a discharge test can be calculated respectively. By calculating the discrete coefficients of current and voltage, the stability of current and voltage of the electrical detection equipment during the discharge test can be judged to avoid working when the stability of current and voltage of the electrical detection equipment is poor, thereby avoiding the situation where the current output is unstable and the current attenuation occurs due to unstable current and voltage, thereby reducing the loss of discharge during the exploration process.

[0059] The process of analyzing the state of the electrical detection equipment in S2 further includes:

[0060] By using the electrical method to detect the power consumption status of the equipment, the influence coefficient The influence coefficient threshold is set Make a comparison;

[0061] like Determine whether the current power consumption status of the electrical detection equipment is affected;

[0062] like Determine that the current power consumption status of the electrical detection equipment is not affected;

[0063] Through the above technical solution, this example detects the power consumption status of the equipment by the electrical method and affects the coefficient The influence coefficient threshold is set By comparing the data, an accurate judgment can be made on whether the current power usage status of the electrical detection equipment is affected, thereby avoiding the situation in which the electrical detection equipment is affected by the power usage status during the exploration process, resulting in unstable current output and current attenuation, and further leading to increased discharge loss, thereby improving the accuracy of coal geological detection results.

[0064] The process of analyzing the state of the electrical detection equipment in S2 further includes:

[0065] When it is determined that the current power consumption status of the electrical detection equipment is affected, the subsequent electrical detection test operation on the exploration point is stopped, and the electrical detection equipment is calibrated, and a second test is performed after calibration until the value of the power consumption status influence coefficient of the electrical detection equipment is less than the preset influence coefficient threshold;

[0066] Through the above technical solution, this example calibrates the electrical detection equipment and performs a secondary test after calibration. The stability of the voltage and current during use of the electrical detection equipment can be improved by calibrating the electrical detection equipment until the value of the power consumption status influence coefficient of the electrical detection equipment is less than the preset influence coefficient threshold. At this time, the voltage and current stability of the electrical detection equipment is better, which can avoid the current output being unstable and the current attenuation occurring during use, thereby avoiding the loss of discharge capacity.

[0067] The process of analyzing the influence of geological characteristics of the exploration area on the discharge capacity in S4 includes:

[0068] By observing the change of apparent resistivity with depth, the diffusion depth range of current at different depths underground is inferred, and the diffusion area change curve θ(t) of current at different depths is established;

[0069] By formula Calculate the discharge current loss index ω during the ath electrical detection test a;

[0070] And through the formula Calculate and obtain the average current loss index ω of the electrical detection test at the current exploration point;

[0071] Where a is any electrical detection test, b is the total number of electrical detection tests, γ a is the error influence coefficient of the a-th electrical detection test, which is set according to empirical fitting, jl a is the actual detection distance during the ath electrical detection test, jl y is the preset detection distance, c is a detection point at a fixed distance in the exploration area, d is the total number of detection points in the actual detection distance during the a-th electrical detection test, mj ac is the current diffusion area at the depth of the cth detection point during the ath electrical detection test, t1 is the first detection point at a fixed distance interval in the exploration area, t2 is the last detection point at a fixed distance interval in the exploration area, x1 and x2 are the first weight coefficients, which are set according to empirical fitting;

[0072] Through the above technical solution, this example provides the discharge current loss index during the a-th electrical detection test and the average current loss index ω of the electrical detection test at the current exploration point, which can be respectively expressed by the formula With the formula Calculated, where The change in the current diffusion area with the increase in depth during the exploration operation can be calculated. Obviously, when the actual detection distance during the a-th electrical detection test is less than the preset detection distance, and the average current diffusion area during the a-th electrical detection test and the change in the current diffusion area are larger, the average current loss index ω of the electrical detection test at the current exploration point is larger, indicating that when the electrical detection operation is performed at the current exploration point, the current will have a large loss after entering the underground due to the influence of environmental factors such as landforms and geological structures, resulting in the current being unable to reach the preset observation depth. Conversely, when the actual detection distance during the a-th electrical detection test is greater than or close to the preset detection distance, and the average current diffusion area during the a-th electrical detection test and the change in the current diffusion area are smaller, the average current loss index ω of the electrical detection test at the current exploration point is smaller, indicating that when the electrical detection operation is performed at the current exploration point, after the current enters the underground, the influence of environmental factors such as landforms and geological structures will not have a large impact on the depth of the current, so that the current can reach the preset observation depth;

[0073] By combining diversified data to calculate the average current loss index of the electrical detection test at the current exploration point, an accurate judgment can be made for the severity of the interference of external factors on the current detection, thereby facilitating the subsequent adjustment and correction of the preset discharge amount.

[0074] The process of analyzing the influence of the geological characteristics of the exploration area on the discharge amount in S4 also includes:

[0075] The average current loss index ω of the electrical detection test at the current exploration point is compared with the preset current loss coefficient threshold ω 01 Make a comparison;

[0076] If ω ≥ ω 01 , it is judged that the electrical detection is being used for detection at the current exploration point. When the output current moves deep underground, external factors seriously interfere with the current detection, resulting in the preset output current being unable to detect the target distance, and the preset discharge amount needs to be adjusted;

[0077] On the contrary, it is judged that the electrical detection is being used for detection at the current exploration point. When the output current moves deep underground, the external factors slightly interfere with the current detection. The preset output current can detect the target distance, and there is no need to adjust the preset discharge amount.

[0078] Through the above technical solution, this embodiment compares the average current loss index ω of the current exploration point electrical detection test with the preset current loss coefficient threshold ω 01 By comparison, when electrical detection is used at the current exploration point, the severity of interference of external factors on current detection can be accurately judged, and it can be further judged whether the preset output current can detect the target distance, so as to decide whether the preset discharge amount needs to be adjusted, so as to avoid the loss of current during the detection process and the failure to adjust it in time, resulting in limited detection depth and reduced data accuracy, thereby improving the accuracy of coal geological detection results.

[0079] The process of correcting the preset discharge amount of the electrical detection device in S5 includes:

[0080] By formula Calculate and obtain the discharge amount μ after the electrical detection equipment is adjusted;

[0081] Among them, μ y is the preset discharge amount, f v To adjust the coefficient comparison table function, according to The influence of the range of values ​​on the discharge capacity is obtained based on the test, y1 and y2 are the second weight coefficients, which are set based on empirical fitting;

[0082] Through the above technical solution, this example provides the discharge amount μ adjusted by the electrical detection device, which can be obtained by the formula Calculated, through this calculation method, combined with the power consumption status of the electrical detection equipment, the influence coefficient After obtaining two sets of data from the average current loss index ω of the electrical detection test at the current exploration point, since the two sets of data can reflect the loss of discharge during the detection operation from multiple levels, the preset discharge amount can be corrected by combining the two sets of data, which can improve the accuracy of the correction result, thereby ensuring that the corrected discharge amount can still reach the preset detection depth even if there is loss during the exploration operation, avoiding the situation where the detection depth is limited and the data accuracy is reduced, and avoiding the situation where current leakage and electromagnetic interference caused by excessive electricity occur, thereby improving the accuracy of the coal geological range detection results.

[0083] The process of correcting the preset discharge amount of the electrical detection device in S5 also includes:

[0084] After obtaining the discharge volume μ adjusted by the electrical detection equipment, check the connection between the electrode and the wire to ensure good contact and reduce human errors;

[0085] Through the above technical scheme, this example provides a process for correcting the preset discharge amount of the electrical detection equipment. After obtaining the adjusted discharge amount μ of the electrical detection equipment, it is necessary to check the connection between the electrodes and the wires to ensure good contact and reduce human errors, thereby improving the accuracy of the coal geological range detection results.

[0086] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for coal geological range detection based on physical electrical detection, characterized in that: The method comprises: S1: Collect geological data on the exploration area, including geological maps, stratigraphic sections and geological structure maps; S2: Perform a discharge test on the electrical detection equipment and analyze the power usage status of the electrical detection equipment based on the data of the discharge test; S3: Select appropriate exploration points in the exploration area according to the exploration plan and geological data, and ensure that the exploration points reflect the geological characteristics of the entire exploration area; S4: Conduct multiple electrical detection tests on the exploration points using electrical detection equipment, and analyze the impact of the geological characteristics of the exploration area on the discharge amount based on the data from the electrical detection tests; S5: By combining the analysis results of the influence of geological characteristics of the exploration area on the discharge amount with the status analysis results of the electrical equipment, the preset discharge amount of the electrical detection equipment is corrected; S6: After the discharge amount correction is completed, the electrodes are rearranged on the surface to supply direct current to the underground. By observing the resistivity changes of the rock layers at different depths, the distribution and thickness of the underground coal seams are analyzed.

2. A method for coal geological range detection based on physical electrical detection according to claim 1, characterized in that: The process of analyzing the state of the electrical detection equipment in S2 includes: By formula Calculate the power consumption status influence coefficient of electrical detection equipment Where i is a data collection time point at a fixed time interval during the discharge test of the electrical detection equipment, n is the total number of data collection times during the discharge test of the electrical detection equipment, and dl i is the current magnitude at the i-th time point during the discharge test of the electrical detection equipment, dl y is the preset current size, For all dl i The average value of dy i is the voltage at the i-th time point during the discharge test of the electrical detection equipment, dy y is the preset voltage size, For all i The average value of .

3. A method for coal geological range detection based on physical electrical detection according to claim 2, characterized in that: The process of analyzing the state of the electrical detection equipment in S2 further includes: By using the electrical method to detect the power consumption status of the equipment, the influence coefficient The influence coefficient threshold is set Make a comparison; like Determine whether the current power consumption status of the electrical detection equipment is affected; like It is determined that the current power usage status of the electrical detection equipment is not affected.

4. A method for coal geological range detection based on physical electrical detection according to claim 3, characterized in that: The process of analyzing the state of the electrical detection equipment in S2 further includes: When it is determined that the current power usage status of the electrical detection equipment is affected, the subsequent electrical detection test operations on the exploration point are stopped, the electrical detection equipment is calibrated, and a secondary test is performed after calibration until the value of the power usage status impact coefficient of the electrical detection equipment is less than the preset impact coefficient threshold.

5. A method for coal geological range detection based on physical electrical detection according to claim 4, characterized in that: The process of analyzing the influence of geological characteristics of the exploration area on the discharge amount in S4 includes: By observing the change of apparent resistivity with depth, the diffusion depth range of current at different depths underground is inferred, and the diffusion area change curve θ(t) of current at different depths is established; By formula Calculate the discharge current loss index ω during the ath electrical detection test a ; And through the formula Calculate and obtain the average current loss index ω of the electrical detection test at the current exploration point; Where a is any electrical detection test, b is the total number of electrical detection tests, γ a is the error influence coefficient of the a-th electrical detection test, which is set according to empirical fitting, jl a is the actual detection distance during the ath electrical detection test, jl y is the preset detection distance, c is a detection point at a fixed distance in the exploration area, d is the total number of detection points in the actual detection distance during the a-th electrical detection test, mj ac is the current diffusion area at the depth of the cth detection point in the ath electrical detection test, t1 is the first detection point at a fixed distance in the exploration area, t2 is the last detection point at a fixed distance in the exploration area, x1 and x2 are the first weight coefficients, which are set according to empirical fitting.

6. A method for coal geological range detection based on physical electrical detection according to claim 5, characterized in that: The process of analyzing the influence of the geological characteristics of the exploration area on the discharge amount in S4 also includes: The average current loss index ω of the electrical detection test at the current exploration point is compared with the preset current loss coefficient threshold ω 01 Make a comparison; If ω ≥ ω 01 , it is judged that the electrical detection is being used for detection at the current exploration point. When the output current moves deep underground, external factors seriously interfere with the current detection, resulting in the preset output current being unable to detect the target distance, and the preset discharge amount needs to be adjusted; On the contrary, it is judged that electrical detection is being used for detection operations at the current exploration point. When the output current moves deep underground, external factors interfere slightly with the current detection. The preset output current can detect the target distance, and there is no need to adjust the preset discharge amount.

7. A method for coal geological range detection based on physical electrical detection according to claim 6, characterized in that: The process of correcting the preset discharge amount of the electrical detection device in S5 includes: By formula Calculate and obtain the discharge amount μ after the electrical detection equipment is adjusted; Among them, μ y is the preset discharge amount, f v To adjust the coefficient comparison table function, according to The influence of the value range on the discharge capacity is obtained based on the test, and y1 and y2 are the second weight coefficients, which are set according to empirical fitting.

8. A method for coal geological range detection based on physical electrical detection according to claim 7, characterized in that: The process of correcting the preset discharge amount of the electrical detection device in S5 also includes: After obtaining the discharge volume μ adjusted by the electrical detection equipment, check the connection between the electrodes and the wires to ensure good contact and reduce human errors.

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