5G + CMFT-R time domain electromagnetic field exploration system and method

Abstract

The invention discloses a 5G + CMFT-R time domain electromagnetic field exploration system and method, and is suitable for detection and control of roof water damage in the coal mining process. In view of the characteristics of coal seam roof thickness, complex ground surface and the like in northwest regions of China, aiming at the defects of the existing ground and underground transient electromagnetic detection method, the invention adopts a transmitting coil to surround a coal face to implement primary electromagnetic field transmission, and an underground signal transmission system and aground signal acquisition system are connected to finish the same-frequency synchronization of receiving and transmitting; and a ground receiving coil receives the secondary electromagnetic field point by point according to the measurement network arrangement. And the acquired current and voltage data are converted into apparent resistivity data so as to acquire apparent resistivity images of different layers and carry out anomaly interpretation. The method can give full play to the detection advantages of the transient electromagnetic method in the northwest coal mine area, obtains a higher-precision detection result at a lower cost, can accurately judge the spatial position of the water-rich area of the coal seam roof, and provides reliable technical parameters for safe and efficient production of a coal mine.

Description

technical field [0001] The invention relates to the technical field of detection and prevention of coal mining water disasters, in particular to a 5G+CMFT-R time-domain electromagnetic field exploration system and method. Background technique [0002] The Early and Middle Jurassic coalfields in Northwest my country have many coal layers, large thickness, and rich resources. In recent years, some coalfields are weakly water-rich, soft rock, water-sand mixed intermittent water inrush accidents have occurred frequently, and the short-term large amount of water has seriously threatened mine safety. Production. Therefore, it is necessary to use geophysical prospecting methods to find out the water-rich anomalous areas in coal mines, so as to formulate corresponding preventive measures. Due to its high construction efficiency, pure secondary field observation, and sensitivity to low-resistivity bodies, the transient electromagnetic method has become the preferred method in the cur...

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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a 5G+CMFT-R time-domain electromagnetic field exploration system and method to solve the problem of the transient electromagnetic method having limited underground detection distance, poor resolution, unreliable data, and being affected by terrain on the ground. Problems such as difficult construction and high cost can improve the accuracy of detection results and meet mine safety and high-efficiency production requirements

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