Electrical advanced detection system and method
A technology of advanced detection and electrical method, which is applied in the fields of electrical/magnetic detection for well logging records, climate sustainability, water resource assessment, etc., and can solve the problems of large errors in advanced detection work and inability to accurately locate anomalies , to achieve the effects of saving drilling workload, improving construction efficiency and less interference
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Embodiment 1
[0040] Such as figure 1 As shown, the electrical advanced detection system, the advanced detection system includes at least two advanced exploration boreholes, an electrode 1, an electrical instrument 3 for power supply, current and voltage collection, the advanced exploration borehole is located in front of the heading, and the advanced exploration drill One or more electrodes 1 are arranged in the hole, and the electrodes 1 in the advance drilling hole are connected to the electrical instrument 3 through the cable 2. The electrical instrument 3 can use the equipment in the prior art, and can also be selected with power supply and acquisition as required. All-in-one device.
[0041] Advance exploration drilling refers to the drilling in the coal and rock body at a certain distance in front of the excavation, which is used to detect the safety situation ahead and prevent gas outburst. Usually there will be multiple advanced exploration drilling holes before the head-on excava...
Embodiment 2
[0051] Such as Figure 4 As shown, the difference between this embodiment and the first embodiment is: (1) also includes the roadway electrode 41 in the roadway 4; (2) different from the electrode in the first embodiment;
[0052] In the advance detection system, one or more tunnel electrodes 41 are arranged in the tunnel 4 , and the tunnel electrodes 41 are connected to the electrical instrument 3 through the cable 2 . The distance between adjacent roadway electrodes 41 is less than 2m.
[0053] The electrodes in the roadway are not pocket electrodes, but ordinary electrodes (metal rods, metal sheets, etc.), which can be fixed on the side walls or bottom plates of the roadway.
Embodiment 3
[0055] Such as Figure 5 As shown, the difference between the present embodiment and the first embodiment is that it has more than one V-shaped structure.
[0056] The present invention also provides a detection method using the advanced detection system in the first or second embodiment above, including the following steps:
[0057] S01: Use roadway excavation to excavate at least two advance exploration boreholes that meet the requirements in front of the head, so that the advance exploration boreholes meet the following conditions: the distance between the two advance exploration boreholes is greater than or equal to 40m, and the two advance exploration boreholes are respectively connected to The angle formed by the connection between the heads of the excavation is greater than or equal to 23°, and the distance between the advance drilling hole and the head of the excavation is greater than or equal to 102m; to ensure that the water damage area in front can be covered; if t...
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