Cross-hole radar perspective data processing method and system for coal mine driving face

Abstract

The invention belongs to the technical field of mine geophysical prospecting, and particularly relates to a cross-hole radar perspective data processing method and system for a coal mine driving face, and the method comprises the steps: firstly constructing a real inter-hole detection region according to a transmitting hole track and a receiving hole track; according to a preset observation system, radar rays are drawn in the inter-hole detection area, and the path value, the transmitting antenna direction factor and the receiving antenna direction factor of each radar ray are calculated; and finally, constructing a radar wave energy attenuation equation set based on the geometrical shape of the inter-hole detection area, the radar ray path, the transmitting antenna direction factor and the receiving antenna direction factor, and carrying out joint iterative solution on the radar wave energy attenuation equation set to obtain radar wave absorption coefficient distribution in the inter-hole detection area of the tunneling working face. According to the invention, the problem of poor detection precision caused by inaccurate radar wave absorption coefficient in the existing cross-hole radar tomography of the coal mine driving working face can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mine geophysical exploration, and in particular relates to a method and system for processing cross-hole radar perspective data of a coal mine excavation working face. Background Art

[0002] The coal mine excavation face refers to the working area used to dig new tunnels or extend existing tunnels during the coal mining process. In this process, in order to ensure the safe excavation of the tunnel, it is necessary to conduct detailed detection of potential hazardous geological bodies in front of the excavation face.

[0003] Cross-hole radar perspective is a fine-scale detection technology between holes. Cross-hole radar is usually based on the measured field strength values ​​of perspective waves at multiple incident angles, and uses a tomography algorithm to invert the distribution of radar wave absorption coefficients within the detection area. In conventional cross-hole radar detection, the trajectories of the transmitting hole and the receiving hole are parallel straight lines, and the detection area can be assumed to be a simple rectangle or trapezoid. When constructing the detection area, only the drilling depth needs to be considered without considering the drilling trajectory. In addition, the influence of the antenna direction factor is ignored in the process of radar wave absorption coefficient tomography, that is, the change in the angle between the transmitting antenna, the receiving antenna and the drilling trajectory is not considered.

[0004] In order to control the geological conditions outside the tunnel contour line, the boreholes in the coal mine excavation working face are generally arranged in an "eight" shape. Therefore, the trajectories of the transmitting hole and the receiving hole of the cross-hole radar in the coal mine excavation working face are not parallel. When processing data, the real inter-hole detection area must be constructed according to the drilling trajectories of the transmitting hole and the receiving hole. In addition, due to the small distance between the transmitting hole and the receiving hole in the coal mine excavation working face, when the fan-shaped observation method is adopted, the angles of different rays vary greatly, and the antenna direction factor has a significant impact on the imaging results. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a method and system for processing cross-hole radar perspective data of a coal mine excavation working face, so as to solve the problem of poor detection accuracy of existing cross-hole radar tomography of coal mine excavation working face due to inaccurate radar wave absorption coefficient.

[0006] The basic solution provided by the present invention is a method and system for processing cross-hole radar perspective data of a coal mine excavation working face, comprising:

[0007] S1: Obtain the trajectory of the transmitting hole and the receiving hole drilled in the coal mine excavation working face to build a real inter-hole detection area;

[0008] S2: According to the preset observation system, the radar rays are drawn in the inter-hole detection area, and the path value of each radar ray, as well as the directional factor between each radar ray and the transmitting antenna in the transmitting hole, and the directional factor between each radar ray and the receiving antenna in the receiving hole are obtained;

[0009] S3: Based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, a radar wave energy attenuation equation group is constructed, and the radar wave energy attenuation equation group is jointly iteratively solved to obtain the radar wave absorption coefficient distribution in the detection area between the excavation working faces.

[0010] Further, the S1 includes:

[0011] S1-1: Use a drilling trajectory meter to collect trajectory data of the transmitting and receiving holes drilled in the coal mine excavation working face;

[0012] S1-2: Preprocess the trajectory data to generate the real hole detection area of ​​the coal mine excavation working face.

[0013] Further, the S2 includes:

[0014] S2-1: A transmitting antenna is arranged in the transmitting hole, and a receiving antenna is arranged in the receiving hole. According to the preset observation system, the perspective data of the pulse radar wave transmitted from the transmitting antenna to the receiving antenna is collected, and radar rays are drawn in the detection area between the holes;

[0015] S2-2: Grid the inter-hole detection area to generate a number of grid cells, and calculate the length of the section of the grid cell that each radar ray path passes through in the inter-hole detection area, and calculate the radar ray path value;

[0016] S2-3: Extract the angles between each radar ray and the transmitting hole trajectory and the receiving hole trajectory in the inter-hole detection area, and calculate the transmitting antenna directional factor based on the angle between each radar ray and the transmitting hole trajectory, and calculate the receiving antenna directional factor based on the angle between each radar ray and the receiving hole trajectory.

[0017] Further, in S2-2, the radar ray path value calculation formula is:

[0018]

[0019] Among them, r i represents the path value (m) of the i-th ray, l ij represents the length of the section of the i-th ray in the j-th grid unit (m), j represents the grid unit that the radar ray passes through, and n represents the number of grid units passed through.

[0020] Further, the S3 includes:

[0021] S3-1: Based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, a radar wave energy attenuation equation is constructed. The expression of the radar wave energy attenuation equation is:

[0022]

[0023] Where β represents the absorption coefficient of the medium in the excavation working face to the radar wave (Np / m), sinθ1 represents the directivity factor of the transmitting antenna, sinθ2 represents the directivity factor of the receiving antenna, r represents the radar ray path (m), E0 represents the field strength at the transmitting point (V / m), and E r Indicates the field strength at the receiving point (V / m);

[0024] S3-2: According to the field strength values ​​of each radar ray at the transmitting point and the receiving point, establish the radar wave energy attenuation equations;

[0025] S3-3: Solve the radar wave energy attenuation equations through the joint iteration method to generate the radar wave absorption coefficient distribution results in the detection area between the excavation working faces.

[0026] A cross-hole radar perspective data processing system for a coal mine excavation working face, applied to the above-mentioned cross-hole radar perspective data processing method and system for a coal mine excavation working face, comprising:

[0027] The inter-hole detection area construction module is used to construct a real inter-hole detection area based on the collected transmission hole trajectory and receiving hole trajectory drilled in the coal mine excavation working face;

[0028] The radar data processing module is used to collect the perspective data of the pulse radar wave transmitted from the transmitting antenna to the receiving antenna according to the preset observation system, draw radar rays in the inter-hole detection area, and calculate the path value of each radar ray, as well as the directional factor between each radar ray and the transmitting antenna in the transmitting hole, and the directional factor between each radar ray and the receiving antenna in the receiving hole;

[0029] The radar wave absorption coefficient distribution analysis module is used to construct a radar wave energy attenuation equation group based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, and to jointly iterate and solve the radar wave energy attenuation equation group to obtain the radar wave absorption coefficient distribution in the detection area between the excavation working faces.

[0030] The principles and advantages of the present invention are as follows: in the present application, the drilling trajectories of the transmitting holes and the receiving holes in the coal mine excavation working face are firstly collected to generate a real inter-hole detection area, and then according to the preset observation system, the pulse radar wave perspective data transmitted from the transmitting antenna to the receiving antenna is collected, and the radar ray is drawn in the inter-hole detection area. The radar ray path value is calculated based on the drawn radar ray, and the transmitting antenna directional factor and the receiving antenna transmission factor are calculated based on the angles between the radar ray and the transmitting hole trajectory and the receiving hole trajectory respectively. Finally, based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directional factor, the receiving antenna directional factor and other factors, a radar wave energy attenuation equation group is constructed, and the radar wave absorption coefficient distribution result in the detection area between the excavation working face faces is obtained through joint iterative inversion, thereby improving the inversion accuracy of the radar wave absorption coefficient in the detection area between the coal mine excavation working face faces. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a flowchart of an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of a real inter-hole detection area according to an embodiment of the present invention;

[0033] Figure 3 is a functional block diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] The embodiment is basically as shown in the attached Figure 1 As shown: A method and system for processing cross-hole radar perspective data of a coal mine excavation working face, comprising:

[0036] S1: Obtain the trajectory of the transmitting hole and the receiving hole drilled in the coal mine excavation working face to build a real inter-hole detection area; S1 includes:

[0037] S1-1: Use a drilling trajectory meter to collect trajectory data of the transmitting and receiving holes drilled in the coal mine excavation working face;

[0038] S1-2: Preprocess the trajectory data to generate the real hole detection area of ​​the coal mine excavation working face.

[0039] In this embodiment, for the transmitting holes and receiving holes that have been drilled in the coal mine excavation working face, due to the influence of the geology of the excavation working face, the detection area surrounded by the transmitting holes and the receiving holes is not regular, but irregular in shape. Therefore, how to obtain the true shape of the inter-hole detection area of ​​the excavation working face has a relatively large impact on the subsequent cross-hole radar perspective data inversion.

[0040] In this regard, in this application, a drilling trajectory meter is used to collect trajectory data of the transmitting holes and receiving holes in the coal mine excavation working face, and the collected trajectory data is pre-processed to generate a real inter-hole detection area of ​​the coal mine excavation working face. Specifically, the trajectory data collected by the drilling trajectory meter is transmitted to the host computer, imported into the trajectory drawing software, and then the real trajectories of the transmitting holes and receiving holes are presented in the excavation working face view. The detection area surrounded by the transmitting holes, receiving holes and excavation working face represents the real inter-hole detection area of ​​the coal mine excavation working face.

[0041] S2: According to the preset observation system, the radar rays are drawn in the inter-hole detection area, and the path value of each radar ray, as well as the directional factor between each radar ray and the transmitting antenna in the transmitting hole, and the directional factor between each radar ray and the receiving antenna in the receiving hole are obtained; wherein S2 includes:

[0042] S2-1: A transmitting antenna is arranged in the transmitting hole, and a receiving antenna is arranged in the receiving hole. According to the preset observation system, the perspective data of the pulse radar wave transmitted from the transmitting antenna to the receiving antenna is collected, and radar rays are drawn in the detection area between the holes;

[0043] S2-2: Grid the inter-hole detection area to generate a number of grid cells, and calculate the length of the section of the grid cell that each radar ray path passes through in the inter-hole detection area, and calculate the radar ray path value;

[0044] S2-3: Extract the angles between each radar ray and the transmitting hole trajectory and the receiving hole trajectory in the inter-hole detection area, and calculate the transmitting antenna directional factor based on the angle between each radar ray and the transmitting hole trajectory, and calculate the receiving antenna directional factor based on the angle between each radar ray and the receiving hole trajectory.

[0045] In this embodiment, the transmitting antenna in the transmitting hole transmits pulse radar waves, and the receiving antenna in the receiving hole receives pulse radar waves. For the layout of the transmitting antenna and the receiving antenna in the transmitting hole and the receiving hole respectively, the present application adopts a "one transmit and two receive" mode, that is, for the first data detection work of the coal mine excavation working face, the transmitting antenna Tx is firstly arranged at the first target transmitting point, and the receiving antenna includes the receiving antenna Rx1 and the receiving antenna Rx2. For the receiving point, including 2N+1 receiving points, the receiving antenna Rx1 is arranged at the first receiving point, and the receiving antenna Rx2 is arranged at the N+1th receiving point. At this point, the initial layout state of the transmitting antenna and the receiving antenna is completed, and the detection work of the detection area of ​​the coal mine excavation working face can be started.

[0046] When performing the detection work in the detection area of ​​the coal mine excavation working face, first, when the transmitting antenna Tx transmits the first pulse radar wave, the receiving antenna Rx1 and the receiving antenna Rx2 are started at the same time, and the receiving antenna Rx1 and the receiving antenna Rx2 receive the first pulse radar wave emitted by the transmitting antenna Tx; then the receiving antenna Rx1 and the receiving antenna Rx2 move forward by a receiving point distance d, specifically, the receiving antenna Rx1 moves from the first receiving point to the second receiving point, and the receiving antenna Rx2 moves from the N+1th receiving point to the N+2th receiving point. After line Rx2 moves into position, transmitting antenna Tx transmits a second pulse radar wave, and receiving antenna Rx1 and receiving antenna Rx2 receive the second transmitted radar pulse wave again; after reception is completed, receiving antenna Rx1 and receiving antenna Rx2 move forward again, and after moving to the next receiving point, transmitting antenna Tx transmits a third pulse radar wave, and this is repeated. Finally, receiving antenna Rx1 moves point by point from the first receiving point to the Nth receiving point, and receiving antenna Rx2 moves from the N+1th receiving point to the 2N+1th receiving point. Transmitting antenna Tx transmits a total of N pulse radar waves.

[0047] Finally, after the transmitting antenna Tx transmits N pulse radar waves at the first target transmitting point, the receiving antenna Rx1 completes receiving the pulse radar wave at the Nth receiving point, and the receiving antenna Rx2 completes receiving the pulse radar wave at the 2N+1th receiving point, completing the detection work of the coal mine excavation working face detection area at the first target transmitting point.

[0048] After the transmitting antenna Tx completes transmitting N pulse radar waves at the first target transmitting point, the receiving antenna Rx1 and the receiving antenna Rx2 complete receiving the N pulse radar waves at the Nth receiving point and the 2N+1th receiving point respectively, which means that the detection work of the coal mine excavation working face at the first target transmitting point is completed. Then the transmitting antenna Tx moves the transmitting point distance D to the second target transmitting point and starts the pulse radar wave transmission work again. At this time, the receiving antenna Rx1 starts to receive point by point from the Nth receiving point corresponding to the first transmitting point, and the receiving antenna Rx2 starts to receive point by point from the 2N+1th receiving point corresponding to the first transmitting point until the detection work at the second target transmitting point is completed. This execution continues until the transmitting antenna Tx completes the transmission work at the Mth transmitting point, which means that the first round of detection work of the coal mine excavation working face is completed.

[0049] In this way, when the coal mine excavation working face completes the above tasks, the cross-hole radar perspective data collection is completed, and radar rays are drawn in the inter-hole detection area.

[0050] As for the calculation of the radar ray path value, in this application, a number of grid cells are divided in the inter-hole detection area according to the preset grid size, and then ray tracing is performed according to the radar ray to calculate the length of all the cross-sections of each radar ray passing through the grid cells in the inter-hole detection area, and then the radar ray path value is calculated according to the cross-section length. The calculation formula is:

[0051]

[0052] Among them, r i represents the path value (m) of the i-th ray, l ij represents the length of the section of the i-th ray in the j-th grid unit (m), j represents the grid unit that the radar ray passes through, and n represents the number of grid units passed through.

[0053] like Figure 2 As shown, finally, the angles between the radar ray and the transmitting hole trajectory and the receiving hole trajectory in the inter-hole detection area are extracted, where the angle between the radar ray and the transmitting hole trajectory is defined as θ1, and the angle between the radar ray and the receiving hole trajectory is defined as θ2.

[0054] S3: Based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, a radar wave energy attenuation equation group is constructed, and the radar wave energy attenuation equation group is jointly iteratively solved to obtain the radar wave absorption coefficient distribution in the detection area between the excavation working faces; S3 includes:

[0055] S3-1: Based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, a radar wave energy attenuation equation is constructed. The expression of the radar wave energy attenuation equation is:

[0056]

[0057] Where β represents the absorption coefficient of the medium in the excavation working face to the radar wave (Np / m), sinθ1 represents the directivity factor of the transmitting antenna, sinθ2 represents the directivity factor of the receiving antenna, r represents the radar ray path (m), E0 represents the field strength at the transmitting point (V / m), and E r Indicates the field strength at the receiving point (V / m);

[0058] S3-2: According to the field strength values ​​of each radar ray at the transmitting point and the receiving point, establish the radar wave energy attenuation equations;

[0059] Take the natural logarithm of both sides of the radar wave energy attenuation equation described in S3-1, and multiply both sides by the coefficient a to transform the radar wave energy attenuation equation into:

[0060]

[0061] In the above formula, H0 is the field strength at the transmitting point (dB), H r is the field strength at the receiving point (dB). When the absorption coefficient is a variable distribution and the electromagnetic field space is an inhomogeneous medium, the above formula can be approximately expressed as follows:

[0062]

[0063] Assume that there are N rays in the detection area, and divide the detection area into M units according to the given grid size. Discretize the above formula to obtain the radar wave energy attenuation equation group:

[0064]

[0065] In the above formula, l ij represents the length of the line section of the i-th ray in the j-th grid unit (m), β j is the average absorption coefficient of the jth unit (Np / m), F i is the calculation constant for the i-th ray.

[0066] S3-3: Solve the above radar wave energy attenuation equations through the joint iteration method to generate the distribution results of radar wave absorption coefficients in the detection area between the excavation working faces.

[0067] S3-3-1: Use the back projection technique BPT to calculate the initial value β of the average absorption coefficient of each grid cell.

[0068] Assume that n rays pass through a grid cell, l m is the length of the mth ray passing through the unit, and the total length of the rays is L m , the corresponding calculation constant is F m , then the calculation constant used by the unit is used to distribute f m =F m ·l m / L m The total computational constant distribution through the n rays in the cell is:

[0069]

[0070] The total length of the ray is distributed as:

[0071]

[0072] Then the initial value of the average absorption coefficient of the grid unit β = f n / l n .

[0073] S3-3-2: Use ray tracing technology to calculate the length l of the ray in each grid cell ijand the calculation constant F for each ray c .

[0074] S3-3-3: Use the joint iterative algorithm (SIRT) to correct the absorption coefficient β of each unit.

[0075] Assume that a grid cell has n rays passing through it, and ray m is any one of them. The calculation constant obtained by calculating the measured field strength value of this ray is F m , the ray length l of ray m passing through the unit can be obtained by ray tracing method m and the total length of the ray L m and ray calculation constants The calculation constant error assigned to this unit is The total calculation constant error of n rays passing through the unit is:

[0076]

[0077] The total ray length of n rays passing through the cell is:

[0078]

[0079] The absorption coefficient β of the unit is corrected by the following formula:

[0080] β (k+1) =β k +ε n / l n

[0081] S3-3-4: Repeat S3-3-2 and S3-3-3 to perform iterative inversion, and use β min <β (k+1) <β max As a constraint, the average relative error of the ray calculation constant after iteration is:

[0082]

[0083] The average relative error σ is used to judge the convergence degree of the inversion. When σ is very small or no longer decreases or the number of iterations reaches a certain number, the calculation is stopped. The absorption coefficient β obtained at this time is the inversion result.

[0084] Therefore, in the above technical scheme, the trajectories of the transmitting holes and receiving holes in the coal mine excavation working face are first collected to generate a real inter-hole detection area. Then, according to the preset observation system, radar rays are drawn in the inter-hole detection area, and the path value is calculated based on the drawn radar rays. Based on the angles between the radar rays and the transmitting hole trajectory and the receiving hole trajectory, the transmitting antenna directional factor and the receiving antenna transmission factor are obtained. Finally, based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directional factor, the receiving antenna directional factor and other factors, a radar wave energy attenuation equation group is constructed. The distribution result of the radar wave absorption coefficient in the detection area between the excavation working faces is obtained through joint iterative inversion, thereby improving the inversion accuracy of the radar wave absorption coefficient in the detection area between the coal mine excavation working faces.

[0085] like Figure 3 As shown, in another embodiment of the present embodiment, a coal mine excavation working face cross-hole radar perspective data processing system is also included, which is applied to a coal mine excavation working face cross-hole radar perspective data processing method and system, including:

[0086] The inter-hole detection area construction module is used to construct a real inter-hole detection area based on the collected transmission hole trajectory and receiving hole trajectory drilled in the coal mine excavation working face;

[0087] A radar data processing module is used to draw radar rays in the inter-hole detection area according to a preset observation system, and calculate the path value of each radar ray, as well as the directional factor between each radar ray and the transmitting antenna in the transmitting hole, and the directional factor between each radar ray and the receiving antenna in the receiving hole;

[0088] The radar wave absorption coefficient distribution analysis module is used to construct a radar wave energy attenuation equation group based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, and to jointly iterate and solve the radar wave energy attenuation equation group to obtain the radar wave absorption coefficient distribution in the detection area of ​​the coal mine excavation working face.

[0089] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method and system for processing cross-hole radar perspective data of a coal mine excavation working face, characterized in that: include: S1: Obtain the trajectory of the transmitting hole and the receiving hole drilled in the coal mine excavation working face to build a real inter-hole detection area; S2: According to the preset observation system, the radar rays are drawn in the inter-hole detection area, and the path value of each radar ray, as well as the directional factor between each radar ray and the transmitting antenna in the transmitting hole, and the directional factor between each radar ray and the receiving antenna in the receiving hole are obtained; S3: Based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, a radar wave energy attenuation equation group is constructed, and the radar wave energy attenuation equation group is jointly iteratively solved to obtain the radar wave absorption coefficient distribution in the detection area between the excavation working faces.

2. A method and system for processing cross-hole radar perspective data of a coal mine excavation working face according to claim 1, characterized in that: The S1 includes: S1-1: Use a drilling trajectory meter to collect trajectory data of the transmitting and receiving holes drilled in the coal mine excavation working face; S1-2: Preprocess the trajectory data to generate the real inter-hole detection area of ​​the coal mine excavation working face.

3. A method and system for processing cross-hole radar perspective data of a coal mine excavation working face according to claim 2, characterized in that: The S2 includes: S2-1: A transmitting antenna is arranged in the transmitting hole, and a receiving antenna is arranged in the receiving hole. According to the preset observation system, the perspective data of the pulse radar wave transmitted from the transmitting antenna to the receiving antenna is collected, and radar rays are drawn in the detection area between the holes; S2-2: Grid the inter-hole detection area to generate a number of grid cells, and calculate the length of the section of the grid cell that each radar ray path passes through in the inter-hole detection area, and calculate the radar ray path value; S2-3: Extract the angles between each radar ray and the transmitting hole trajectory and the receiving hole trajectory in the inter-hole detection area, and calculate the transmitting antenna directional factor based on the angle between each radar ray and the transmitting hole trajectory, and calculate the receiving antenna directional factor based on the angle between each radar ray and the receiving hole trajectory.

4. A method and system for processing cross-hole radar perspective data of a coal mine excavation working face according to claim 3, characterized in that: In S2-2, the radar ray path value calculation formula is: Among them, r i represents the path value (m) of the i-th ray, l ij represents the length of the section of the i-th ray in the j-th grid unit (m), j represents the grid unit that the radar ray passes through, and n represents the number of grid units passed through.

5. A method and system for processing cross-hole radar perspective data of a coal mine excavation working face according to claim 4, characterized in that: The S3 includes: S3-1: Based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, a radar wave energy attenuation equation is constructed. The expression of the radar wave energy attenuation equation is: Where β represents the absorption coefficient of the medium in the excavation working face to the radar wave (Np / m), sinθ1 represents the directivity factor of the transmitting antenna, sinθ2 represents the directivity factor of the receiving antenna, r represents the radar ray path (m), E0 represents the field strength at the transmitting point (V / m), and E r Indicates the field strength at the receiving point (V / m); S3-2: According to the field strength values ​​of each radar ray at the transmitting point and the receiving point, establish the radar wave energy attenuation equations; S3-3: Solve the radar wave energy attenuation equations through the joint iteration method to generate the distribution results of the radar wave absorption coefficient in the detection area between the excavation working faces.

6. A cross-hole radar perspective data processing system for a coal mine excavation working face, applied to a cross-hole radar perspective data processing method and system for a coal mine excavation working face as described in any one of claims 1 to 5 above, characterized in that: include: The inter-hole detection area construction module is used to construct a real inter-hole detection area based on the collected transmission hole trajectory and receiving hole trajectory drilled in the coal mine excavation working face; The radar data processing module is used to collect the perspective data of the pulse radar wave transmitted from the transmitting antenna to the receiving antenna according to the preset observation system, draw radar rays in the inter-hole detection area, and calculate the path value of each radar ray, as well as the directional factor between each radar ray and the transmitting antenna in the transmitting hole, and the directional factor between each radar ray and the receiving antenna in the receiving hole; The radar wave absorption coefficient distribution analysis module is used to construct a radar wave energy attenuation equation group based on the geometric shape of the inter-hole detection area, the radar ray path, the transmitting antenna directivity factor, and the receiving antenna directivity factor, and to jointly iterate and solve the radar wave energy attenuation equation group to obtain the radar wave absorption coefficient distribution in the detection area between the excavation working faces.

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