A large-diameter drilling pressure relief effect inspection method, system, device and medium

Abstract

This invention discloses a method, system, equipment, and medium for testing the pressure relief effect of large-diameter boreholes. The method involves scientifically arranging borehole electromagnetic radiation sensors to collect electromagnetic radiation signals at different vertical distances before and after pressure relief, and scientifically arranging vector electromagnetic radiation sensors to collect electromagnetic radiation signals at different horizontal distances. Based on these electromagnetic radiation signals, a comprehensive evaluation index is established to evaluate the pressure relief effect along the vertical direction and along the coal wall direction, respectively. This invention enables quantitative evaluation of the pressure relief effect of large-diameter boreholes, improving the reliability and accuracy of pressure relief effect testing.

Description

Technical Field

[0001] This invention relates to the field of coal mine safety technology, and in particular to a method, system, equipment and medium for testing the pressure relief effect of large-diameter boreholes. Background Technology

[0002] Rockburst is a typical dynamic disaster in coal mines, caused by the instantaneous release of elastic energy accumulated in the surrounding rock, resulting in damage to mining spaces, equipment, or casualties. It is highly destructive and seriously threatens safe mine production. Currently, large-diameter borehole drilling is one of the most commonly used methods for preventing and controlling rockbursts. This method uses drilling to eliminate or mitigate surrounding rock deformation and the risk of rockbursts in roadways. However, accurately assessing the effectiveness of the pressure relief remains a technical challenge.

[0003] Currently, the verification of stress relief effects in large-diameter boreholes mainly relies on methods such as stress sensor monitoring, microseismic monitoring, or electromagnetic radiation monitoring. Stress sensor monitoring primarily analyzes stress relief effects by measuring local stress changes at specific points; microseismic or electromagnetic radiation monitoring qualitatively analyzes stress relief effects by measuring the reduction in parameters such as the total energy and frequency of microseismic events before and after stress relief. However, stress sensor monitoring involves a large workload; microseismic monitoring requires event triggering, has a very large coverage area, and can only qualitatively analyze stress relief effects; electromagnetic radiation monitoring only utilizes amplitude, ignoring the coordinated response of pulse and energy to the evolution of surrounding rock stress.

[0004] In summary, existing methods for verifying the above effects mainly rely on subjective experience or single-index analysis, lack multi-parameter coupling models, and cannot simultaneously monitor stress distribution vertically to the coal face and along the strike direction, resulting in ambiguity in the range of the stress relief zone and making it difficult to quantitatively evaluate the stress relief effect. Summary of the Invention

[0005] The purpose of this invention is to provide a method, system, equipment, and medium for testing the pressure relief effect of large-diameter boreholes, so as to achieve quantitative evaluation of the pressure relief effect and accurate delineation of the pressure relief zone boundary.

[0006] To achieve the above objectives, the present invention provides a method for testing the pressure relief effect of large-diameter boreholes, comprising: The amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after depressurization were collected by the borehole electromagnetic radiation sensor at a preset hole depth spacing. The amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole were collected by multiple vector electromagnetic radiation sensors. The first comprehensive evaluation index for different vertical distances is calculated based on the amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief in large-diameter boreholes. The second comprehensive evaluation index for different horizontal distances is calculated based on the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief in large-diameter boreholes. The pressure relief effect along the vertical coal wall direction within the pressure relief area of ​​the large-diameter borehole is evaluated based on the first comprehensive evaluation index, and the pressure relief effect along the coal wall direction within the pressure relief area of ​​the large-diameter borehole is evaluated based on the second comprehensive evaluation index.

[0007] Optionally, the drilling electromagnetic radiation sensor is arranged in a small-diameter borehole at a predetermined distance from the center of a large-diameter borehole; The preset distance is 1 meter, the construction hole diameter of the small-diameter borehole is 42 millimeters, and the total construction hole depth is 30 meters.

[0008] Optionally, the plurality of vector electromagnetic radiation sensors are arranged symmetrically at the same height on both sides of the center of the large-diameter borehole at a preset interval; The preset spacing is 1 meter, and the number of vector electromagnetic radiation sensors is 20.

[0009] Optionally, after evaluating the pressure relief effect along the vertical direction of the coal wall within the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and evaluating the pressure relief effect along the coal wall within the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index, the method further includes: The pressure relief zone within the large-diameter borehole pressure relief area is divided along the direction perpendicular to the coal wall based on the first comprehensive evaluation index, and the pressure relief zone within the large-diameter borehole pressure relief area is divided along the direction of the coal wall based on the second comprehensive evaluation index.

[0010] Optionally, the calculation of a first comprehensive evaluation index for different vertical distances based on the amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief, and the calculation of a second comprehensive evaluation index for different horizontal distances based on the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief, include: The amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief are used to calculate the rate of change of borehole electromagnetic radiation signal amplitude, pulse, and energy at different vertical distances. The first comprehensive evaluation index for different vertical distances is calculated based on the rate of change of amplitude, pulse rate of change, and energy rate of change of borehole electromagnetic radiation signals at different vertical distances. The amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization in large-diameter boreholes were used to calculate the rate of change of amplitude, pulse, and energy of vector electromagnetic radiation signals at different horizontal distances. The second comprehensive evaluation index for different horizontal distances is calculated based on the rate of change of amplitude, pulse rate of change, and energy rate of change of vector electromagnetic radiation signals at different horizontal distances.

[0011] Optionally, the first comprehensive evaluation index is calculated using the following formula: ; ; ; ; in, This represents the first comprehensive evaluation index. This represents the rate of change of borehole electromagnetic radiation signal amplitude at different horizontal distances. This represents the rate of change of borehole electromagnetic radiation pulses at different horizontal distances. This represents the rate of change of borehole electromagnetic radiation energy at different horizontal distances. , , They are respectively , , The weighting coefficients, , The amplitude of the electromagnetic radiation signal at different horizontal distances before pressure relief in large-diameter boreholes. The amplitude of the borehole electromagnetic radiation signal at different horizontal distances after pressure relief in a large-diameter borehole. Electromagnetic radiation pulses from boreholes at different horizontal distances before pressure relief in large-diameter boreholes. These are electromagnetic radiation pulses from a large-diameter borehole at different horizontal distances after pressure relief. The values ​​represent the electromagnetic radiation energy of large-diameter boreholes at different horizontal distances before pressure relief. The values ​​of electromagnetic radiation energy at different horizontal distances after pressure relief in large-diameter boreholes; The second comprehensive evaluation index is calculated using the following formula: ; ; ; ; in, This represents the second comprehensive evaluation index. This represents the rate of change of the amplitude of the vector electromagnetic radiation signal at different vertical distances. This represents the rate of change of the vector electromagnetic radiation pulse at different vertical distances. This represents the rate of change of vector electromagnetic radiation energy at different vertical distances. , , They are respectively , , The weighting coefficients, , The amplitude of the vector electromagnetic radiation signal at different vertical distances before pressure relief in a large-diameter borehole. The amplitude of the vector electromagnetic radiation signal at different vertical distances after pressure relief in a large-diameter borehole. Vector electromagnetic radiation pulses at different vertical distances before pressure relief in large-diameter boreholes. These are vector electromagnetic radiation pulses at different vertical distances after pressure relief in large-diameter boreholes. The vector electromagnetic radiation energy values ​​at different vertical distances before pressure relief in large-diameter boreholes. The vector electromagnetic radiation energy values ​​at different vertical distances after pressure relief in a large-diameter borehole.

[0012] Optionally, the step of dividing the pressure relief zone along the direction perpendicular to the coal wall within the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and dividing the pressure relief zone along the coal wall within the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index, includes: when When the corresponding vertical distance is used to determine the pressure relief area of ​​the large-diameter borehole as the weak pressure relief area, when When the pressure relief zone of the large-diameter borehole at the corresponding vertical distance is determined to be the medium pressure relief zone, when At that time, the pressure relief area of ​​the large-diameter borehole at the corresponding vertical distance is determined to be the strong pressure relief zone; when When the pressure relief zone of the large-diameter borehole at the corresponding horizontal distance is determined to be a weak pressure relief zone, when At that time, the pressure relief zone of the large-diameter borehole at the corresponding horizontal distance is determined to be the medium pressure relief zone. At that time, the pressure relief area of ​​the large-diameter borehole at the corresponding horizontal distance is determined to be the strong pressure relief zone.

[0013] To achieve the above objectives, the present invention also provides a system for testing the pressure relief effect of large-diameter boreholes, comprising: The borehole electromagnetic radiation monitoring module is used to collect the amplitude, pulse, and energy values ​​of borehole electromagnetic radiation signals at different vertical distances before and after depressurization of large-diameter boreholes monitored by borehole electromagnetic radiation sensors at preset borehole depth intervals. The vector electromagnetic radiation monitoring module is used to collect the amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole monitored by multiple vector electromagnetic radiation sensors. The comprehensive evaluation index calculation module is used to calculate the first comprehensive evaluation index for different vertical distances based on the amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief of the large-diameter borehole, and to calculate the second comprehensive evaluation index for different horizontal distances based on the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief of the large-diameter borehole. The pressure relief effect verification module is used to evaluate the pressure relief effect along the vertical coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and to evaluate the pressure relief effect along the coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index.

[0014] To achieve the above objectives, the present invention also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the large-diameter borehole pressure relief effect inspection method as described above.

[0015] To achieve the above objectives, the present invention also provides a computer-readable storage medium comprising a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the large-diameter borehole pressure relief effect testing method as described above.

[0016] Compared with existing technologies, this invention provides a method, system, equipment, and medium for verifying the pressure relief effect of large-diameter boreholes. It collects electromagnetic radiation signals at different vertical distances before and after pressure relief in large-diameter boreholes through a rationally and scientifically arranged arrangement of borehole electromagnetic radiation sensors, and collects electromagnetic radiation signals at different horizontal distances through a rationally and scientifically arranged arrangement of vector electromagnetic radiation sensors. Based on these electromagnetic radiation signals, a comprehensive evaluation index is established to evaluate the pressure relief effect along the vertical direction and along the coal wall direction, respectively. This invention enables quantitative and refined evaluation of the pressure relief effect of large-diameter boreholes, accurately delineates the pressure relief zone range, and improves the reliability and accuracy of pressure relief effect verification. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart of a method for testing the pressure relief effect of large-diameter boreholes according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the arrangement of the borehole electromagnetic radiation sensor provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the arrangement of multiple vector electromagnetic radiation sensors provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the amplitude, pulse, and energy distribution of electromagnetic radiation signals from a large-diameter borehole before and after pressure relief, at different vertical distances provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of the amplitude, pulse, and energy distribution of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole, provided in an embodiment of the present invention. Figure 6 This is a schematic diagram showing the distribution of comprehensive monitoring index values ​​and vector comprehensive monitoring index values ​​for borehole electromagnetic radiation provided in this embodiment of the invention; Figure 7 This is a structural block diagram of a large-diameter borehole pressure relief effect testing system provided in an embodiment of the present invention; Figure 8 This is a structural block diagram of a terminal device provided in an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that in the fields of geological exploration and mining, boreholes with a diameter greater than 150 mm are generally considered large-diameter boreholes. However, for pressure relief using large-diameter boreholes, according to standard GB / T 25217.10-2019, the diameter of the pressure relief borehole is specified as 100 mm to 200 mm. Therefore, this embodiment of the invention mainly uses a large-diameter borehole with a diameter of 150 mm and a length of 25 m designed and constructed perpendicular to the coal face in the stress concentration zone of the mine for pressure relief. The center of this large-diameter borehole is 1.5 m from the roadway floor, and drilling is carried out perpendicular to the coal face.

[0021] See Figure 1 , Figure 1 This is a flowchart of a method for testing the pressure relief effect of large-diameter boreholes according to an embodiment of the present invention. The method for testing the pressure relief effect of large-diameter boreholes includes steps S1 to S4: S1. Collect the amplitude, pulse and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after depressurization of the large-diameter borehole by the borehole electromagnetic radiation sensor at a preset hole depth spacing. Preferably, the drilling electromagnetic radiation sensor is arranged in a small-diameter borehole at a preset distance from the center of the large-diameter borehole; wherein the preset distance is 1 meter, the construction diameter of the small-diameter borehole is 42 mm, and the total construction depth is 30 meters.

[0022] See Figure 2 , Figure 2 This is a schematic diagram illustrating the arrangement of the borehole electromagnetic radiation sensor provided in an embodiment of the present invention. Figure 2 As shown, by way of example, on both sides of the area where the pressure relief measures are implemented by the large-diameter borehole, that is, at any position 1 meter away from the center of the large-diameter borehole, small-diameter boreholes with a diameter of 42 mm and a depth of 30 m are implemented, and the small-diameter boreholes are arranged at the same height as the large-diameter boreholes.

[0023] Before and after the pressure relief measures were implemented, borehole electromagnetic radiation sensors were inserted into small-diameter boreholes using probes. Measurement points were arranged at 1-meter intervals between borehole depths to collect the amplitude, pulse, and energy values ​​of borehole electromagnetic radiation signals at different vertical distances. The monitoring time for each measurement point was 1 minute, and the average of the borehole electromagnetic radiation signal amplitude, pulse, and energy values ​​measured at that point within 1 minute was taken as the monitoring value for that point.

[0024] It should be noted that although theoretically the geological conditions in the vicinity are the same, the heterogeneity of geological bodies in reality means that coal and rock masses in the same area may have slight differences in composition, structure, and mechanical properties. For example, the mineral content, porosity, and degree of fracture development of coal and rock may differ at different locations. Therefore, the pressure relief effect of large-diameter boreholes may vary in different directions and distances. Thus, in practical implementation, multiple small-diameter boreholes can be drilled simultaneously at symmetrical locations to collect data from different positions, avoiding the bias in monitoring results caused by local geological differences. The data processing procedure monitored by each small-diameter borehole is similar to that exemplified in the embodiments of this invention, and will not be repeated here.

[0025] It is worth noting that the above settings can ensure a reasonable distance from the depressurization area while achieving accurate and stable acquisition of vertical signals through standardized small-diameter drilling parameters. This provides reliable basic data for subsequent evaluation of the vertical depressurization effect and improves the targeting and effectiveness of vertical distance signal monitoring.

[0026] S2. Collect the amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole monitored by multiple vector electromagnetic radiation sensors. Preferably, the plurality of vector electromagnetic radiation sensors are symmetrically arranged at the same height on both sides of the center of the large-diameter borehole at a preset interval; wherein, the preset interval is 1 meter, and the number of vector electromagnetic radiation sensors is 20.

[0027] See Figure 3 , Figure 3 This is a schematic diagram illustrating the arrangement of multiple vector electromagnetic radiation sensors provided in an embodiment of the present invention. Figure 3 As shown, for example, 10 vector electromagnetic radiation sensors capable of testing electromagnetic radiation signals in the X, Y, and Z directions are symmetrically arranged at equal heights on both the left and right sides of the center of a large-diameter borehole at a spacing of 1 meter, in order to monitor the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signals at different horizontal distances from the depressurization center before and after the depressurization of the large-diameter borehole.

[0028] It is worth noting that the above arrangement can fully cover the monitoring range along the coal wall direction. The symmetrical distribution ensures the balance and integrity of signal acquisition at different distances in the horizontal direction. The setting of 20 sensors with a 1-meter spacing can accurately capture the gradient changes of the pressure relief effect in the horizontal direction, providing multi-dimensional reliable data for subsequent evaluation of the pressure relief effect along the coal wall direction and improving the accuracy of horizontal pressure relief feature monitoring.

[0029] S3. Calculate the first comprehensive evaluation index for different vertical distances based on the amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief of the large-diameter borehole; calculate the second comprehensive evaluation index for different horizontal distances based on the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief of the large-diameter borehole. In one optional embodiment, step S3 includes: The amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief are used to calculate the rate of change of borehole electromagnetic radiation signal amplitude, pulse, and energy at different vertical distances. The first comprehensive evaluation index for different vertical distances is calculated based on the rate of change of amplitude, pulse rate of change, and energy rate of change of borehole electromagnetic radiation signals at different vertical distances. The amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization in large-diameter boreholes were used to calculate the rate of change of amplitude, pulse, and energy of vector electromagnetic radiation signals at different horizontal distances. The second comprehensive evaluation index for different horizontal distances is calculated based on the rate of change of amplitude, pulse rate of change, and energy rate of change of vector electromagnetic radiation signals at different horizontal distances.

[0030] Specifically, the first comprehensive evaluation index is calculated using the following formula: ; ; ; ; in, This represents the first comprehensive evaluation index. This represents the rate of change of borehole electromagnetic radiation signal amplitude at different horizontal distances. This represents the rate of change of borehole electromagnetic radiation pulses at different horizontal distances. This represents the rate of change of borehole electromagnetic radiation energy at different horizontal distances. , , They are respectively , , The weighting coefficients, , The amplitude of the electromagnetic radiation signal at different horizontal distances before pressure relief in large-diameter boreholes. The amplitude of the borehole electromagnetic radiation signal at different horizontal distances after pressure relief in a large-diameter borehole. Electromagnetic radiation pulses from boreholes at different horizontal distances before pressure relief in large-diameter boreholes. These are electromagnetic radiation pulses from a large-diameter borehole at different horizontal distances after pressure relief. The values ​​represent the electromagnetic radiation energy of large-diameter boreholes at different horizontal distances before pressure relief. The values ​​of electromagnetic radiation energy at different horizontal distances after pressure relief in large-diameter boreholes; The second comprehensive evaluation index is calculated using the following formula: ; ; ; ; in, This represents the second comprehensive evaluation index. This represents the rate of change of the amplitude of the vector electromagnetic radiation signal at different vertical distances. This represents the rate of change of the vector electromagnetic radiation pulse at different vertical distances. This represents the rate of change of vector electromagnetic radiation energy at different vertical distances. , , They are respectively , , The weighting coefficients, , The amplitude of the vector electromagnetic radiation signal at different vertical distances before pressure relief in a large-diameter borehole. The amplitude of the vector electromagnetic radiation signal at different vertical distances after pressure relief in a large-diameter borehole. Vector electromagnetic radiation pulses at different vertical distances before pressure relief in large-diameter boreholes. These are vector electromagnetic radiation pulses at different vertical distances after pressure relief in large-diameter boreholes. The vector electromagnetic radiation energy values ​​at different vertical distances before pressure relief in large-diameter boreholes. The vector electromagnetic radiation energy values ​​at different vertical distances after pressure relief in a large-diameter borehole.

[0031] Understandably, the embodiments of the present invention utilize the characteristic parameters of borehole or vector electromagnetic radiation signals to verify the pressure relief effect of large-diameter boreholes. First, the pressure relief effect evaluation index, the rate of change of borehole or vector electromagnetic radiation amplitude, is defined. or Rate of change of emitted pulse or Energy change rate or Based on this, and according to the actual conditions of the applied mine, the response characteristics of different borehole or vector electromagnetic radiation signal characteristic parameters to surrounding rock damage are determined, and their respective weighting coefficients are determined. , , and , , .

[0032] See Figure 4 , Figure 4 This is a schematic diagram showing the amplitude, pulse, and energy distribution of electromagnetic radiation signals from a large-diameter borehole at different vertical distances before and after pressure relief, according to an embodiment of the present invention. Figure 4 From (a) to (c), taking a hole depth of 15 meters as an example, before pressure relief in a large-diameter borehole, the amplitude, pulses, and energy of the borehole electromagnetic radiation signal at that depth (i.e., that vertical distance) are approximately 3.0 mV, 860 pulses, and 1.12 J, respectively; after pressure relief in a large-diameter borehole, the amplitude, pulses, and energy of the borehole electromagnetic radiation signal at that depth (i.e., that vertical distance) are approximately 2.25 mV, 680 pulses, and 0.91 J, respectively. Therefore, at a hole depth of 15 meters... , , .

[0033] See Figure 5 , Figure 5 This is a schematic diagram showing the amplitude, pulse, and energy distribution of vector electromagnetic radiation signals at different horizontal distances before and after depressurization in a large-diameter borehole, as provided in an embodiment of the present invention. Figure 5From (a) to (c), taking measuring point 5 to the left of the large-diameter borehole (at this time, the measuring point is 5 meters to the left of the center of the large-diameter borehole) as an example, before the pressure was released from the large-diameter borehole, the amplitude, pulse, and energy of the vector electromagnetic radiation signal corresponding to this measuring point (i.e., this horizontal distance) were approximately 1.12mV, 237 pulses, and 0.75J, respectively; after the pressure was released from the large-diameter borehole, the amplitude, pulse, and energy of the vector electromagnetic radiation signal corresponding to this measuring point (i.e., this horizontal distance) were approximately 0.78mV, 168 pulses, and 0.52J, respectively. Therefore, when the measuring point is numbered 5, , , .

[0034] It is worth noting that, whether it is borehole drilling or vector electromagnetic radiation, the amplitude, pulse, and energy of electromagnetic radiation before and after decompression all show a significant decrease, and all three can well express the decompression effect of coal and rock.

[0035] It should be noted that, considering that electromagnetic pulses can more comprehensively express the internal damage characteristics of coal and rock, the weighting coefficients for the amplitude, pulse, and energy value change rate of the borehole and vector electromagnetic radiation signals in this embodiment are determined to be 0.3, 0.4, and 0.3, respectively. and Furthermore, the electromagnetic radiation at different measuring points was calculated. Value, based on The value distribution range determines the pressure relief zone range after pressure relief in large-diameter boreholes in this embodiment of the invention.

[0036] See Figure 6 , Figure 6 This is a schematic diagram showing the distribution of comprehensive monitoring index values ​​and vector comprehensive monitoring index values ​​for borehole electromagnetic radiation provided in an embodiment of the present invention.

[0037] like Figure 6 As shown in (a), when the hole depth is 15 meters: ; like Figure 6 As shown in (b), when the measuring point number is 5: .

[0038] S4. Evaluate the pressure relief effect along the vertical coal wall direction within the pressure relief area of ​​the large-diameter borehole based on the first comprehensive evaluation index, and evaluate the pressure relief effect along the coal wall direction within the pressure relief area of ​​the large-diameter borehole based on the second comprehensive evaluation index.

[0039] For example, in an embodiment of the present invention, ≥20% and A pressure reduction of ≥20% is used as the standard for determining whether the area where the measuring point is located has reached the pressure relief level. According to this standard, if... Figure 6As shown in (a), overall, the regions with hole depths of 12-20m and 28-29m are... Both are greater than 20%, indicating that the effective range of the pressure relief zone along the direction perpendicular to the coal face is approximately 12-20m and 28-29m from the borehole wall of the large-diameter borehole; if Figure 6 As shown in (b), measuring points numbered 2~20 If all values ​​are greater than 20%, it indicates that the effective range of the pressure relief zone along the coal face is approximately the area where measuring point number 2-20 is located.

[0040] In an optional embodiment, after step S4, the method for verifying the pressure relief effect of large-diameter boreholes further includes: The pressure relief zone within the large-diameter borehole pressure relief area is divided along the direction perpendicular to the coal wall based on the first comprehensive evaluation index, and the pressure relief zone within the large-diameter borehole pressure relief area is divided along the direction of the coal wall based on the second comprehensive evaluation index.

[0041] Specifically, when When the corresponding vertical distance is used to determine the pressure relief area of ​​the large-diameter borehole as the weak pressure relief area, when When the pressure relief zone of the large-diameter borehole at the corresponding vertical distance is determined to be the medium pressure relief zone, when At that time, the pressure relief area of ​​the large-diameter borehole at the corresponding vertical distance is determined to be the strong pressure relief zone; when When the pressure relief zone of the large-diameter borehole at the corresponding horizontal distance is determined to be a weak pressure relief zone, when At that time, the pressure relief zone of the large-diameter borehole at the corresponding horizontal distance is determined to be the medium pressure relief zone. At that time, the pressure relief area of ​​the large-diameter borehole at the corresponding horizontal distance is determined to be the strong pressure relief zone.

[0042] Depend on Figure 6 (a) It can be seen that, in general, the area at a depth of 13-19m from the coal face is a weak pressure relief zone; the area at a depth of 28-29m from the coal face is a medium pressure relief zone.

[0043] Depend on Figure 6 (b) It can be seen that the areas where measuring points 2, 7-10 and 12-20 are located are strong pressure relief areas; the areas where measuring points 3-6 and 11 are located are medium pressure relief areas; and the area where measuring point 1 is located is a weak pressure relief area.

[0044] In summary, the method for verifying the pressure relief effect of large-diameter boreholes provided by this invention involves scientifically arranging borehole electromagnetic radiation sensors to collect electromagnetic radiation signals (amplitude, pulse, and energy) at different vertical distances before and after pressure relief in large-diameter boreholes, and scientifically arranging vector electromagnetic radiation sensors to collect electromagnetic radiation signals (amplitude, pulse, and energy) at different horizontal distances. Based on these electromagnetic radiation signals, a Q-value distribution characteristic is established to evaluate the pressure relief effect along both the vertical and horizontal directions of the coal face. This invention, through joint monitoring of borehole electromagnetic radiation and vector electromagnetic radiation, constructs a multi-parameter coupled model of amplitude, pulse, and energy change rate. This model can simultaneously determine the distribution characteristics of the pressure relief effect along both the vertical and horizontal directions of the coal face, achieving a quantitative and refined evaluation of the pressure relief effect. It overcomes the subjectivity of traditional experience-based judgments, accurately delineates the pressure relief zone range, and improves the reliability and accuracy of pressure relief effect verification.

[0045] Based on the above method items, the present invention provides corresponding system items embodiments.

[0046] See Figure 7 , Figure 7 This is a structural block diagram of a large-diameter borehole pressure relief effect testing system provided in an embodiment of the present invention. The large-diameter borehole pressure relief effect testing system 20 includes: The borehole electromagnetic radiation monitoring module 21 is used to collect the amplitude, pulse and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after depressurization of a large-diameter borehole monitored by the borehole electromagnetic radiation sensor at a preset hole depth spacing. The vector electromagnetic radiation monitoring module 22 is used to collect the amplitude, pulse and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole monitored by multiple vector electromagnetic radiation sensors. The comprehensive evaluation index calculation module 23 is used to calculate the first comprehensive evaluation index for different vertical distances based on the amplitude, pulse and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief of the large-diameter borehole, and to calculate the second comprehensive evaluation index for different horizontal distances based on the amplitude, pulse and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief of the large-diameter borehole. The pressure relief effect inspection module 24 is used to evaluate the pressure relief effect along the vertical coal wall direction in the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and to evaluate the pressure relief effect along the coal wall direction in the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index.

[0047] It should be noted that the large-diameter borehole pressure relief effect testing system provided in this embodiment of the invention is used to execute all the process steps of the large-diameter borehole pressure relief effect testing method in the above embodiment. The working principles and beneficial effects of the two are one-to-one, so they will not be described again.

[0048] This invention also provides a terminal device, such as... Figure 8 The diagram shown is a structural block diagram of a preferred embodiment of a terminal device provided by the present invention. The terminal device includes a processor 31, a memory 32, and a computer program stored in the memory 32 and configured to be executed by the processor 31. When the processor 31 executes the computer program, it implements the method for verifying the pressure relief effect of large-diameter drilling as described in any of the above embodiments.

[0049] In addition, embodiments of the present invention also provide a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the large-diameter borehole pressure relief effect inspection method as described in any of the above embodiments.

[0050] When the processor 31 executes the computer program, it implements the steps in the above-described embodiment of the method for verifying the pressure relief effect of large-diameter drilling, for example... Figure 1 All steps of the large-diameter borehole pressure relief effect testing method shown. Alternatively, when the processor 31 executes the computer program, it implements the functions of each module in the above-described large-diameter borehole pressure relief effect testing system embodiment, for example... Figure 7 The functions of each module in the large-diameter borehole pressure relief effect testing system are shown.

[0051] Preferably, the computer program can be divided into one or more modules / units, which are stored in the memory 32 and executed by the processor 31 to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in the terminal device.

[0052] The processor 31 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor, or the processor 31 can be any conventional processor. The processor 31 is the control center of the terminal device, connecting various parts of the terminal device through various interfaces and lines.

[0053] The memory 32 mainly includes a program storage area and a data storage area. The program storage area can store the operating system, applications required for at least one function, etc., and the data storage area can store related data, etc. In addition, the memory 32 can be a high-speed random access memory, or a non-volatile memory, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, and a flash card, etc., or the memory 32 can also be other volatile solid-state storage devices.

[0054] It should be noted that the aforementioned terminal devices may include, but are not limited to, processors and memory, as will be understood by those skilled in the art. Figure 8 The structural block diagram shown is merely a structural example of the terminal device described above and does not constitute a limitation on the structure of the terminal device. The terminal device may include more or fewer components than shown, or combine certain components, or use different components.

[0055] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for inspecting the pressure relief effect of large-diameter boreholes, characterized in that, include: The amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after depressurization were collected by the borehole electromagnetic radiation sensor at a preset hole depth spacing. The amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole were collected by multiple vector electromagnetic radiation sensors. The first comprehensive evaluation index for different vertical distances is calculated based on the amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief in large-diameter boreholes. The second comprehensive evaluation index for different horizontal distances is calculated based on the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief in large-diameter boreholes. The pressure relief effect along the vertical coal wall direction within the pressure relief area of ​​the large-diameter borehole is evaluated based on the first comprehensive evaluation index, and the pressure relief effect along the coal wall direction within the pressure relief area of ​​the large-diameter borehole is evaluated based on the second comprehensive evaluation index.

2. The method for testing the pressure relief effect of large-diameter boreholes as described in claim 1, characterized in that, The borehole electromagnetic radiation sensor is arranged in a small-diameter borehole at a preset distance from the center of the large-diameter borehole. The preset distance is 1 meter, the construction hole diameter of the small-diameter borehole is 42 millimeters, and the total construction hole depth is 30 meters.

3. The method for testing the pressure relief effect of large-diameter boreholes as described in claim 1, characterized in that, The multiple vector electromagnetic radiation sensors are symmetrically arranged at the same height on both sides of the center of the large-diameter borehole at a preset spacing; The preset spacing is 1 meter, and the number of vector electromagnetic radiation sensors is 20.

4. The method for testing the pressure relief effect of large-diameter boreholes as described in claim 1, characterized in that, After evaluating the pressure relief effect along the vertical coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and evaluating the pressure relief effect along the coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index, the method further includes: The pressure relief zone within the large-diameter borehole pressure relief area is divided along the direction perpendicular to the coal wall based on the first comprehensive evaluation index, and the pressure relief zone within the large-diameter borehole pressure relief area is divided along the direction of the coal wall based on the second comprehensive evaluation index.

5. The method for testing the pressure relief effect of large-diameter boreholes as described in claim 1, characterized in that, The calculation of a first comprehensive evaluation index for different vertical distances based on the amplitude, pulse, and energy values ​​of borehole electromagnetic radiation signals at different vertical distances before and after pressure relief, and the calculation of a second comprehensive evaluation index for different horizontal distances based on the amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after pressure relief, include: The amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief are used to calculate the rate of change of borehole electromagnetic radiation signal amplitude, pulse, and energy at different vertical distances. The first comprehensive evaluation index for different vertical distances is calculated based on the rate of change of amplitude, pulse rate of change, and energy rate of change of borehole electromagnetic radiation signals at different vertical distances. The amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization in large-diameter boreholes were used to calculate the rate of change of amplitude, pulse, and energy of vector electromagnetic radiation signals at different horizontal distances. The second comprehensive evaluation index for different horizontal distances is calculated based on the rate of change of amplitude, pulse rate of change, and energy rate of change of vector electromagnetic radiation signals at different horizontal distances.

6. The method for testing the pressure relief effect of large-diameter boreholes as described in claim 5, characterized in that, The first comprehensive evaluation index is calculated using the following formula: ； ； ； ； in, This represents the first comprehensive evaluation index. This represents the rate of change of the amplitude of the borehole electromagnetic radiation signal at different horizontal distances. This represents the rate of change of borehole electromagnetic radiation pulses at different horizontal distances. This represents the rate of change of borehole electromagnetic radiation energy at different horizontal distances. , , They are respectively , , The weighting coefficients, , The amplitude of the electromagnetic radiation signal at different horizontal distances before pressure relief in large-diameter boreholes. The amplitude of the borehole electromagnetic radiation signal at different horizontal distances after pressure relief in a large-diameter borehole. Electromagnetic radiation pulses from boreholes at different horizontal distances before pressure relief in large-diameter boreholes. These are electromagnetic radiation pulses from a large-diameter borehole at different horizontal distances after pressure relief. The values ​​represent the electromagnetic radiation energy of large-diameter boreholes at different horizontal distances before pressure relief. The values ​​of electromagnetic radiation energy at different horizontal distances after pressure relief in large-diameter boreholes; The second comprehensive evaluation index is calculated using the following formula: ； ； ； ； in, This represents the second comprehensive evaluation index. This represents the rate of change of the amplitude of the vector electromagnetic radiation signal at different vertical distances. This represents the rate of change of the vector electromagnetic radiation pulse at different vertical distances. This represents the rate of change of vector electromagnetic radiation energy at different vertical distances. , , They are respectively , , The weighting coefficients, , The amplitude of the vector electromagnetic radiation signal at different vertical distances before pressure relief in a large-diameter borehole. The amplitude of the vector electromagnetic radiation signal at different vertical distances after pressure relief in a large-diameter borehole. Vector electromagnetic radiation pulses at different vertical distances before pressure relief in large-diameter boreholes. These are vector electromagnetic radiation pulses at different vertical distances after pressure relief in large-diameter boreholes. The vector electromagnetic radiation energy values ​​at different vertical distances before pressure relief in large-diameter boreholes. The vector electromagnetic radiation energy values ​​at different vertical distances after pressure relief in a large-diameter borehole.

7. The method for testing the pressure relief effect of large-diameter boreholes as described in claim 4, characterized in that, The process of dividing the pressure relief zone along the vertical direction of the coal wall within the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and dividing the pressure relief zone along the coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index, includes: when When the pressure relief zone of the large-diameter borehole at the corresponding vertical distance is determined to be a weak pressure relief zone, when When the pressure relief zone of the large-diameter borehole at the corresponding vertical distance is determined to be the medium pressure relief zone, when At that time, the pressure relief area of ​​the large-diameter borehole at the corresponding vertical distance is determined to be the strong pressure relief zone; when When the pressure relief zone of the large-diameter borehole at the corresponding horizontal distance is determined to be a weak pressure relief zone, when At that time, the pressure relief zone of the large-diameter borehole at the corresponding horizontal distance is determined to be the medium pressure relief zone. At that time, the pressure relief area of ​​the large-diameter borehole at the corresponding horizontal distance is determined to be the strong pressure relief zone.

8. A system for testing the pressure relief effect of large-diameter boreholes, characterized in that, include: The borehole electromagnetic radiation monitoring module is used to collect the amplitude, pulse, and energy values ​​of borehole electromagnetic radiation signals at different vertical distances before and after depressurization of large-diameter boreholes monitored by borehole electromagnetic radiation sensors at preset borehole depth intervals. The vector electromagnetic radiation monitoring module is used to collect the amplitude, pulse, and energy values ​​of vector electromagnetic radiation signals at different horizontal distances before and after depressurization of a large-diameter borehole monitored by multiple vector electromagnetic radiation sensors. The comprehensive evaluation index calculation module is used to calculate the first comprehensive evaluation index for different vertical distances based on the amplitude, pulse, and energy values ​​of the borehole electromagnetic radiation signal at different vertical distances before and after pressure relief of the large-diameter borehole, and to calculate the second comprehensive evaluation index for different horizontal distances based on the amplitude, pulse, and energy values ​​of the vector electromagnetic radiation signal at different horizontal distances before and after pressure relief of the large-diameter borehole. The pressure relief effect verification module is used to evaluate the pressure relief effect along the vertical coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the first comprehensive evaluation index, and to evaluate the pressure relief effect along the coal wall direction within the pressure relief area of ​​the large-diameter borehole according to the second comprehensive evaluation index.

9. A terminal device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the method for testing the pressure relief effect of large-diameter boreholes as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the large-diameter borehole pressure relief effect testing method as described in any one of claims 1 to 7.

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