利用矿井瞬变电磁法超前探测走向导水断层研究

doi:10.11799/ce201603029

Abstract

Abstract: The transient electromagnetic response characteristics of water conductive fault, is decided by the coupling relation between its space position and the transmitting-receiving device. Based on the geo-electrical model of 3D conductive sheet, according to the theoretical analysis and the physical simulation, it was discussed how the eddy current in the sheet vary with the exciting position of the first field, and studied the apparent resistivity response of the water-conductive strike fault by the mine transient electromagnetic advance detection(MTEAD). The results show: 1) the induced eddy current is decided mainly by the number of the magnetic line, which is cut by the sheet, and it is stronger when the exciting angle is 30°～60°; 2) on the apparent resistivity contour map of MTEAD, the response of the water-conductive strike fault is one middle high resistivity abnormal area with two low resistivity abnormal areas on the left and right sides symmetrically. The result was applied to engineering, and gained good effects.

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http://www.coale.com.cn/EN/Y2016/V48/I3/92

References

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Response characteristics of water-conductive strike fault by mine transient electromagnetic advanced detection

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