Method and system for collecting cross-hole radar perspective detection data of 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 detection data acquisition method and system for a coal mine driving working face, and the method comprises the steps: firstly drilling corresponding transmitting holes and receiving holes in the coal mine driving working face according to the shape of a detection area, and then laying transmitting points and receiving points in the transmitting holes and the receiving holes; the transmitting antenna and the receiving antenna are arranged according to preset positions, then data are acquired point by point according to a one-transmitting double-receiving mode, the positions of the transmitting hole and the receiving hole and the types of the antennas therein are exchanged after acquisition is completed, the transmitting antenna and the receiving antenna are recycled after detection work is completed again, and the detection work is ended. According to the invention, the problems of large work amount and low efficiency during implementation of the cross-hole radar in the prior art 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 collecting data of cross-hole radar perspective detection of a coal mine excavation working face. Background Art

[0002] Coal mine excavation working face refers to the working area used to dig new tunnels or extend existing tunnels during coal mining. In this process, in order to ensure the safe production of the mine and prevent potential geological disasters such as water hazards, it is usually necessary to explore the geological conditions ahead of the excavation.

[0003] At present, a variety of mature geophysical detection technologies have been widely used in the field of advance detection of water hazards in tunneling, such as seismic waves, electromagnetic waves (including transient electromagnetic method and geological radar method) and direct current methods (such as direct current resistivity method and induced polarization method). Among them, underground geological radar and reflection slot wave technologies have been listed as recommended technologies due to their high accuracy and reliability. In addition, there are traditional direct current methods and transient electromagnetic methods suitable for tunnel environments, which can detect the distribution of low-resistance water-rich abnormal areas within 0 to 100 meters ahead of tunneling.

[0004] Among them, cross-hole radar technology is a commonly used means of fine detection of geological structures between holes. Its principle is to transmit high-frequency electromagnetic waves in one borehole, receive the transmitted high-frequency electromagnetic waves in another borehole, and realize fine detection of geological structures between holes through tomography technology. Specifically, cross-hole radar usually adopts a "one-transmit-one-receive" data acquisition mode, that is, a transmitting antenna is arranged in one borehole and a receiving antenna is arranged in another borehole. At each transmitting point of the transmitting hole, the transmitting antenna repeats the transmission multiple times, and the receiving antenna receives point by point according to the preset receiving spacing. In order to make the detection area covered by radar rays as much as possible, adjacent transmitting points need to retain half of the receiving points for repeated detection. Therefore, each time the transmitting point is changed, the receiving antenna needs to be moved to the midpoint of the last receiving path. This "one-transmit-one-receive" acquisition mode requires frequent movement of the receiving antenna, which has the disadvantages of large engineering workload and low efficiency. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a method and system for collecting data of cross-hole radar perspective detection of a coal mine excavation working face, so as to solve the problems of large engineering workload and low efficiency in the implementation of cross-hole radar in the prior art.

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

[0007] S1: Obtain the target coal mine excavation working face structure, and drill a transmitting hole and a receiving hole on both sides of the target coal mine excavation working face;

[0008] S2: M transmitting points are arranged in the transmitting hole according to the preset transmitting point distance D, and for each transmitting point, 2N+1 receiving points are arranged in the receiving hole according to the receiving point distance d;

[0009] S3: Place the transmitting antenna at the transmitting point, the receiving antenna Rx1 at the first receiving point, and the receiving antenna Rx2 at the N+1 receiving point. The transmitting antenna repeatedly transmits pulse radar waves at the transmitting point, the receiving antenna Rx1 receives at 1 to N receiving points one by one, and the receiving antenna Rx2 receives at N+1 to 2N+1 receiving points one by one.

[0010] S4: Repeat the S3 operation to complete the transmission work of the M transmission points in the transmission hole and the data reception work in the corresponding receiving hole;

[0011] S5: Exchange the positions of the transmitting hole and the receiving hole, and repeat steps S3 and S4 until the data collection of the target coal mine excavation working face is completed.

[0012] Further, the S1 includes:

[0013] S1-1: Detect the geological structure between the coal mine excavation working faces based on the principle of electromagnetic wave tomography, and establish a detection area of ​​a preset shape according to the environmental conditions of the coal mine excavation working face, wherein the detection area of ​​the preset shape includes a rectangular detection area, a trapezoidal detection area and a wedge-shaped detection area;

[0014] S1-2: Drill transmitting holes and receiving holes on both sides of the detection area, the maximum perspective distance between the transmitting holes and the receiving holes is greater than or equal to 10m, the detection depth is greater than or equal to 50m, and the resolution is less than or equal to 0.5m.

[0015] Further, the S2 includes:

[0016] S2-1: Based on the launch holes drilled in S1, M launch points are arranged according to the preset launch point distance D;

[0017] S2-2: According to each transmitting point arranged in S2-1, 2N+1 receiving points are arranged in the corresponding receiving hole, and the receiving point distance between the receiving points is d, where d=D / N.

[0018] Further, the S3 includes:

[0019] S3-1: Initially, the transmitting antenna Tx is arranged at the first target transmitting point, and after transmitting the pulse radar wave N times, it is transferred to the next target transmitting point according to the preset transmitting point distance D, and the pulse radar wave is transmitted N times until it is transferred to the Mth transmitting point;

[0020] S3-2: The receiving antenna Rx1 in the receiving hole is placed at the first receiving point corresponding to the first target transmitting point, and the receiving antenna Rx2 is placed at the N+1th receiving point;

[0021] S3-3: When the transmitting antenna Tx transmits the pulse radar wave for the first time at the first target transmitting point, the receiving antenna Rx1 and the receiving antenna Rx2 are started to simultaneously receive the pulse radar wave emitted by the transmitting antenna Tx, thereby completing the first data collection of the target coal mine excavation working face;

[0022] S3-4: before the transmitting antenna Tx transmits the pulse radar wave for the second time, the receiving antenna Rx1 and the receiving antenna Rx2 are synchronously moved forward by a receiving point distance d. After the movement is completed, the transmitting antenna Tx transmits the pulse radar wave for the second time, and the receiving antenna Rx1 and the receiving antenna Rx2 simultaneously start to receive the pulse radar wave emitted by the transmitting antenna Tx for the second time, thereby completing the second data collection of the target excavation working face;

[0023] S3-5: Repeat the operations of the transmitting antenna Tx, the receiving antenna Rx1 and the receiving antenna Rx2 in S3-4 until the transmitting antenna Tx transmits N pulse radar waves.

[0024] Further, the S4 includes:

[0025] S4-1: Move the transmitting antenna Tx forward by a distance D from the transmitting point and retransmit N pulse radar waves at the second target transmitting point in sequence. The receiving antenna Rx1 receives signals point by point from the Nth receiving point corresponding to the first transmitting point, and the receiving antenna Rx2 receives signals point by point from the 2N+1th receiving point corresponding to the first transmitting point.

[0026] S4-2: Repeat step S4-1 until the transmitting antenna Tx moves forward to M transmitting points, and the receiving antenna Rx1 and the receiving antenna Rx2 complete the work of receiving data, and the work of the transmitting antenna Tx, the receiving antenna Rx1 and the receiving antenna Rx2 ends.

[0027] A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face, applied to the above-mentioned method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face, comprising:

[0028] The drilling layout module is used to open the transmitting holes and receiving holes in the preset detection area according to the acquired environmental conditions of the target coal mine excavation working face;

[0029] The antenna layout module is used to layout M transmitting points in the transmitting hole according to the preset transmitting point distance D, and to layout 2N+1 receiving points according to the receiving point distance d; at the same time, the transmitting antenna is placed at the transmitting point, the receiving antenna Rx1 is placed at the first receiving point, and the receiving antenna Rx2 is placed at the N+1 receiving point;

[0030] The data acquisition module is used for the transmitting antenna to repeatedly transmit pulse radar waves at the transmitting point, the receiving antenna Rx1 to receive point by point at 1 to N receiving points, and the receiving antenna Rx2 to receive point by point at N+1 to 2N+1 receiving points; until the transmitting antenna completes the transmission work at M transmitting points, and the receiving antenna Rx1 and the receiving antenna Rx2 complete the data receiving work;

[0031] The antenna layout module is also used to exchange the transmitting hole and the receiving hole after the data acquisition module completes the first round of acquisition work; the data acquisition module is also used to perform data acquisition work again after the antenna layout module exchanges the transmitting hole and the receiving hole.

[0032] The principles and advantages of the present invention are as follows: In the present application, in view of the defects and problems of the "one transmit and one receive" acquisition mode used in the cross-hole radar technology in the prior art, the present application adopts the "one transmit and two receive" acquisition mode. Specifically, first, according to the conditions of the target coal mine excavation working face, detection areas of different shapes are opened, and transmitting holes and receiving holes are opened according to the detection areas of different shapes, so as to meet the different geological conditions of different coal mine excavation working faces; and for the drilled transmitting holes and receiving holes, M transmitting points are arranged in the transmitting holes according to the transmitting point distance, and 2N+1 receiving points are arranged in the corresponding receiving holes according to the receiving point distance, and in the transmitting holes, the transmitting points are arranged at the same time. A transmitting antenna is arranged at the transmitting point, and a receiving antenna is arranged at the receiving point according to a pattern of 1 to N, N+1 to 2N+1. The transmitting antenna at the transmitting point transmits N pulse radar waves, and the two receiving antennas at the receiving point move in sequence according to the receiving points and receive the pulse radar waves. After the detection work at the first transmitting point is completed, the transmitting antenna moves to the next transmitting point, and the two receiving antennas can continue to receive data from the next transmitting point at their end point without moving back to the midpoint of the last receiving path, so that the receiving antenna does not need to be reset, reducing the number of times the receiving antenna moves, and improving the data detection efficiency of the coal mine excavation working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a flowchart of an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the layout of a coal mine excavation working face according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods:

[0036] The embodiment is basically as follows Figure 1 and Figure 2 As shown: A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face, comprising:

[0037] S1: Obtain the target coal mine excavation working face structure, and drill a transmitting hole and a receiving hole on both sides of the target coal mine excavation working face; S1 includes:

[0038] S1-1: Detect the geological structure between the coal mine excavation working faces based on the principle of electromagnetic wave tomography, and establish a detection area of ​​a preset shape according to the environmental conditions of the coal mine excavation working face, wherein the detection area of ​​the preset shape includes a rectangular detection area, a trapezoidal detection area and a wedge-shaped detection area;

[0039] S1-2: Drill transmitting holes and receiving holes on both sides of the detection area, the maximum perspective distance between the transmitting holes and the receiving holes is greater than or equal to 10m, the detection depth is greater than or equal to 50m, and the resolution is less than or equal to 0.5m.

[0040] In this embodiment, for different coal mine excavation working faces that need to be detected, the detection area is usually irregular in shape, and drilling requires straight drilling. Therefore, the detection area is equivalently divided into rectangular areas, trapezoidal areas, and wedge-shaped detection areas to better implement the detection work. In other embodiments of this embodiment, in addition to the area shapes described above, other shapes may also be included, and this embodiment does not limit it.

[0041] As for the boreholes drilled in the detection area, they include transmitting holes and receiving holes. In this embodiment, the transmitting holes and receiving holes do not refer to two fixed boreholes, but are determined according to the types of antennas arranged in the boreholes, that is, the transmitting holes can also be used as receiving holes, and the receiving holes can also be used as transmitting holes, and it is only necessary to exchange the types of antennas in the boreholes.

[0042] In addition, with regard to the specifications of the drilled transmitting holes and receiving holes, in this embodiment, the maximum perspective distance between the transmitting holes and the receiving holes is greater than or equal to 10m, the detection depth is greater than or equal to 50m, and the resolution is less than or equal to 0.5m; so that the recognition accuracy of geological anomalies in the detection area of ​​the coal mine excavation working face is greater than 85%.

[0043] S2: M transmitting points are arranged in the transmitting hole according to the preset transmitting point distance D, and 2N+1 receiving points are arranged according to the receiving point distance d; wherein S2 includes:

[0044] S2-1: Based on the launch holes drilled in S1, M launch points are arranged according to the preset launch point distance D;

[0045] S2-2: According to each transmitting point arranged in S2-1, 2N+1 receiving points are arranged in the corresponding receiving hole, and the receiving point distance between the receiving points is d, where d=D / N.

[0046] In this embodiment, points need to be arranged in both the transmitting hole and the receiving hole, namely, the transmitting point and the receiving point, for arranging the transmitting antenna and the receiving antenna.

[0047] S3: The transmitting antenna is placed at the transmitting point, the receiving antenna Rx1 is placed at the first receiving point, and the receiving antenna Rx2 is placed at the N+1 receiving point. The transmitting antenna repeatedly transmits pulse radar waves at the transmitting point, the receiving antenna Rx1 receives point by point at 1 to N receiving points, and the receiving antenna Rx2 receives point by point at N+1 to 2N+1 receiving points. S3 includes:

[0048] S3-1: Initially, the transmitting antenna Tx is arranged at the first target transmitting point, and after transmitting the pulse radar wave N times, it is transferred to the next target transmitting point according to the preset transmitting point distance D, and the pulse radar wave is transmitted N times until it is transferred to the Mth transmitting point;

[0049] S3-2: The receiving antenna Rx1 in the receiving hole is placed at the first receiving point corresponding to the first target transmitting point, and the receiving antenna Rx2 is placed at the N+1th receiving point;

[0050] S3-3: When the transmitting antenna Tx transmits the pulse radar wave for the first time at the first target transmitting point, the receiving antenna Rx1 and the receiving antenna Rx2 are started to simultaneously receive the pulse radar wave emitted by the transmitting antenna Tx, thereby completing the first data collection of the target coal mine excavation working face;

[0051] S3-4: before the transmitting antenna fx transmits the pulse radar wave for the second time, the receiving antenna Rx1 and the receiving antenna Rx2 are synchronously moved forward by a receiving point distance d. After the movement is completed, the transmitting antenna Tx transmits the pulse radar wave for the second time, and the receiving antenna Rx1 and the receiving antenna Rx2 simultaneously start to receive the pulse radar wave emitted by the transmitting antenna Tx for the second time, completing the second data collection of the target excavation working face;

[0052] S3-5: Repeat the operations of the transmitting antenna Tx, the receiving antenna Rx1 and the receiving antenna Rx2 in S3-4 until the transmitting antenna Tx transmits N pulse radar waves.

[0053] In this embodiment, the "one transmit, two receive" mode is adopted for the layout of the transmitting antenna and the receiving antenna in the transmitting hole and the receiving hole respectively, that is, for the first data detection work of the coal mine excavation working face, the transmitting antenna Tx is firstly deployed at the first target transmitting point, and the receiving antenna includes the receiving antenna Rx1 and the receiving antenna Rx2. For each transmitting point, the receiving hole includes 2N+1 receiving points, the receiving antenna Rx1 is deployed at the first receiving point, and the receiving antenna Rx2 is deployed 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 coal mine excavation working face detection area can be started.

[0054] 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 synchronously by the 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 the receiving antenna Rx2 moves into position, the transmitting antenna Tx transmits the second pulse radar wave, and the receiving antenna Rx1 and the receiving antenna Rx2 receive the second transmitted radar pulse wave again; after the reception is completed, the receiving antenna Rx1 and the receiving antenna Rx2 move forward again, and after moving to the next receiving point, the transmitting antenna Tx transmits the pulse radar wave for the third time, and this is repeated. Finally, the receiving antenna Rx1 moves point by point from the 1st receiving point to the Nth receiving point, and the receiving antenna Rx2 moves from the N+1th receiving point to the 2N+1th receiving point. The transmitting antenna Tx transmits a total of N pulse radar waves.

[0055] 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.

[0056] S4: Repeat the S3 operation to complete the transmission work of the M transmission points in the transmission hole and the data receiving work in the corresponding receiving hole; wherein S4 includes:

[0057] S4-1: Move the transmitting antenna Tx forward by a distance D from the transmitting point and retransmit N pulse radar waves at the second target transmitting point in sequence. The receiving antenna Rx1 receives signals point by point from the Nth receiving point corresponding to the first transmitting point, and the receiving antenna Rx2 receives signals point by point from the 2N+1th receiving point corresponding to the first transmitting point.

[0058] S4-2: Repeat step S4-1 until the transmitting antenna fx moves forward to M transmitting points, and the receiving antenna Rx1 and the receiving antenna Rx2 complete the work of receiving data, and the work of the transmitting antenna Tx, the receiving antenna Rx1 and the receiving antenna Rx2 ends.

[0059] In this embodiment, 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 is executed 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.

[0060] After the first round of detection is completed, S5 starts: exchanging the positions of the transmitting hole and the receiving hole, and repeating steps S3 and S4 until the data collection of the target coal mine excavation working face is completed.

[0061] Therefore, the detection work of the coal mine excavation working face in this application adopts the "one transmit and two receive" collection mode. The transmitting antenna in the transmitting hole transmits point by point at the transmitting point distance D, and each transmitting point transmits N times. The two receiving antennas in the receiving hole are arranged at a spacing of N*d, and receive pulse radar waves at the same time. After completing one transmission radar data collection, the two receiving antennas move forward synchronously by a receiving point distance d. When changing the transmitting point, the receiving antenna does not need to move to the midpoint position of the last receiving path, which reduces the number of times the receiving antenna moves and improves data collection efficiency.

[0062] In another embodiment of the present embodiment, a method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face is also included, which is applied to the above-mentioned method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face, including:

[0063] The drilling layout module is used to open the transmitting holes and receiving holes in the preset detection area according to the acquired environmental conditions of the target coal mine excavation working face;

[0064] The antenna arrangement module is used to arrange M transmitting points in the transmitting hole according to the preset transmitting point distance D, and for each transmitting point, 2N+1 receiving points are arranged in the corresponding receiving hole according to the receiving point distance d; at the same time, the transmitting antenna is placed at the transmitting point, the receiving antenna Rx1 is placed at the first receiving point, and the receiving antenna Rx2 is placed at the N+1 receiving point;

[0065] The data acquisition module is used for the transmitting antenna to repeatedly transmit pulse radar waves at the transmitting point, the receiving antenna Rx1 to receive point by point at 1 to N receiving points, and the receiving antenna Rx2 to receive point by point at N+1 to 2N+1 receiving points; until the transmitting antenna completes the transmission work at M transmitting points, and the receiving antenna Rx1 and the receiving antenna Rx2 complete the data receiving work;

[0066] The antenna layout module is also used to exchange the transmitting hole and the receiving hole after the data acquisition module completes the first round of acquisition work; the data acquisition module is also used to perform data acquisition work again after the antenna layout module exchanges the transmitting hole and the receiving hole.

[0067] 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 collecting data of cross-hole radar perspective detection of coal mine excavation working face, characterized in that: include: S1: Obtain the target coal mine excavation working face structure, and drill transmitting holes and receiving holes on both sides of the target coal mine excavation working face; S2: M transmitting points are arranged in the transmitting hole according to the preset transmitting point distance D, and for each transmitting point, 2N+1 receiving points are arranged in the receiving hole according to the receiving point distance d; S3: Place the transmitting antenna at the transmitting point, the receiving antenna Rx1 at the first receiving point, and the receiving antenna Rx2 at the N+1 receiving point. The transmitting antenna repeatedly transmits pulse radar waves at the transmitting point, the receiving antenna Rx1 receives at 1 to N receiving points one by one, and the receiving antenna Rx2 receives at N+1 to 2N+1 receiving points one by one. S4: Repeat the S3 operation to complete the transmission work of the M transmission points in the transmission hole and the data reception work in the corresponding receiving hole; S5: Exchange the positions of the transmitting hole and the receiving hole, and repeat steps S3 and S4 until all data collection work on the target coal mine excavation working face is completed.

2. A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face according to claim 1, characterized in that: The S1 includes: S1-1: Detect the geological structure between the coal mine excavation working faces based on the principle of electromagnetic wave tomography, and establish a detection area of ​​a preset shape according to the environmental conditions of the coal mine excavation working face, wherein the detection area of ​​the preset shape includes a rectangular detection area, a trapezoidal detection area and a wedge-shaped detection area; S1-2: Drill transmitting holes and receiving holes on both sides of the detection area, the maximum perspective distance between the transmitting holes and the receiving holes is greater than or equal to 10m, the detection depth is greater than or equal to 50m, and the resolution is less than or equal to 0.5m.

3. A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face according to claim 2, characterized in that: The S2 includes: S2-1: Based on the launch holes drilled in S1, M launch points are arranged according to the preset launch point distance D; S2-2: According to each transmitting point arranged in S2-1, 2N+1 receiving points are arranged in the corresponding receiving hole, and the receiving point distance between the receiving points is d, where d=D / N.

4. A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face according to claim 3, characterized in that: The S3 includes: S3-1: The transmitting antenna Tx is initially arranged at the first target transmitting point, and after transmitting pulse radar waves N times, it is transferred to the next target transmitting point according to the preset transmitting point distance D, and transmits pulse radar waves N times until it is transferred to the Mth transmitting point; S3-2: The receiving antenna Rx1 in the receiving hole is placed at the first receiving point corresponding to the first target transmitting point, and the receiving antenna Rx2 is placed at the N+1th receiving point; S3-3: When the transmitting antenna Tx transmits the pulse radar wave for the first time at the first target transmitting point, the receiving antenna Rx1 and the receiving antenna Rx2 are started to simultaneously receive the pulse radar wave emitted by the transmitting antenna Tx, thereby completing the first data collection of the target coal mine excavation working face; S3-4: before the transmitting antenna Tx transmits the pulse radar wave for the second time, the receiving antenna Rx1 and the receiving antenna Rx2 are synchronously moved forward by a receiving point distance d. After the movement is completed, the transmitting antenna Tx transmits the pulse radar wave for the second time, and the receiving antenna Rx1 and the receiving antenna Rx2 simultaneously start to receive the pulse radar wave emitted by the transmitting antenna Tx for the second time, thereby completing the second data collection of the target excavation working face; S3-5: Repeat the operations of the transmitting antenna Tx, the receiving antenna Rx1 and the receiving antenna Rx2 in S3-4 until the transmitting antenna Tx transmits N pulse radar waves.

5. A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face according to claim 4, characterized in that: The S4 includes: S4-1: Move the transmitting antenna Tx forward by a distance D from the transmitting point and retransmit N pulse radar waves at the second target transmitting point in sequence. The receiving antenna Rx1 receives signals point by point from the Nth receiving point corresponding to the first transmitting point, and the receiving antenna Rx2 receives signals point by point from the 2N+1th receiving point corresponding to the first transmitting point. S4-2: Repeat step S4-1 until the transmitting antenna Tx moves forward to M transmitting points, and the receiving antenna Rx1 and the receiving antenna Rx2 complete all data reception, and the work of the transmitting antenna Tx, the receiving antenna Rx1 and the receiving antenna Rx2 ends.

6. A method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face, applied to a method and system for collecting data of cross-hole radar perspective detection of coal mine excavation working face as described in any one of claims 1 to 5 above, characterized in that: include: The drilling layout module is used to open the transmitting holes and receiving holes in the preset detection area according to the acquired environmental conditions of the target coal mine excavation working face; The antenna layout module is used to layout M transmitting points in the transmitting hole according to the preset transmitting point distance D, and to layout 2N+1 receiving points according to the receiving point distance d; at the same time, the transmitting antenna is placed at the transmitting point, the receiving antenna Rx1 is placed at the first receiving point, and the receiving antenna Rx2 is placed at the N+1 receiving point; The data acquisition module is used for the transmitting antenna to repeatedly transmit pulse radar waves at the transmitting point, the receiving antenna Rx1 to receive point by point at 1 to N receiving points, and the receiving antenna Rx2 to receive point by point at N+1 to 2N+1 receiving points; until the transmitting antenna completes the transmission work at M transmitting points, and the receiving antenna Rx1 and the receiving antenna Rx2 complete the data receiving work; The antenna layout module is also used to exchange the transmitting hole and the receiving hole after the data acquisition module completes the first round of acquisition work; the data acquisition module is also used to perform data acquisition work again after the antenna layout module exchanges the transmitting hole and the receiving hole.

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