Detection system based on ground and underground space stereoscopic transient electromagnetic data collection

Abstract

The invention provides a detection system based on ground and underground space stereoscopic transient electromagnetic data collection. The system comprises a transient electromagnetic transmitter, a transient electromagnetic transmitting loop, a transient electromagnetic receiver, a ground surface series receiving probe, a vertical hole series receiving probe, a first mining level series receiving probe and a second mining level series receiving probe. The transient electromagnetic transmitter and the transient electromagnetic transmitting loop are arranged on a ground surface and are just above a plan-to-detect target, the vertical hole series receiving probe is arranged in a vertical hole, the first mining level series receiving probe is arranged in a first mining level, and the second mining level series receiving probe is arranged in a second mining level. According to the detection system, the detection advantages of a transient electromagnetic method can be fully played, high precision, ground and underground, space and stereoscopic range transient electromagnetic data can be obtained, a geological anomalous body in a detection range can be accurately determined, and reliable geological data is provided for the safety production of a coal mine.

Description

technical field [0001] The invention relates to a detection system based on the acquisition of three-dimensional transient electromagnetic data in the upper and lower well spaces. Background technique [0002] At present, the detection technology and equipment of hidden disaster-causing geological factors in coal mines are mostly based on ground detection. The transient electromagnetic detection method used in the field of coal mine exploration is mainly the ground detection method. Due to the influence of the volume effect of the transient electromagnetic method, the vertical and lateral resolution of the ground transient electromagnetic method decreases gradually with the increase of the detection depth, and it is difficult to meet the high-resolution detection requirements of deep mines. However, the underground transient electromagnetic detection method is subject to the intrinsic safety and explosion-proof requirements of mine equipment. Generally, the emission current...

AI Technical Summary

Problems solved by technology

Due to the influence of the volume effect of the transient electromagnetic method, the vertical and lateral resolution of the ground transient electromagnetic method decreases gradually with the increase of the detection depth, and it is difficult to meet the high-resolution detection requirements of deep mines.

However, the underground transient electromagnetic detection method is subject to the intrinsic safety and explosion-proof requirements of mine equipment. Generally, the emission current is not greater than 4A, and the electromagnetic interference such as underground industrial electricity and iron is more complicated, and the detection distance is relatively small (generally not greater than 120m). The signal-to-noise ratio is low, and the reliability of the results is greatly affected

Therefore, it is difficult to carry out downhole transient electromagnetic detection

[0003] To sum up, at present, in the coal mine detection operation, the transient electromagnetic method has not yet fully exerted its value in geological detection.

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