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| Application of comprehensive geophysical exploration method in detecting water accumulated in goaf of coal mine |
| Lin Jiangong1, Zhang Lei1, Xiao Yong2 |
| 1. College of Coal Engineering, Datong University, Datong 037003, China; 2. Shanxi Coal Geology 115
Exploration Institute, Datong 037003, China |
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Abstract In order to further clarify the water accumulation in goaf of the mine, the parameter optimization test of the transient electromagnetic method and the induced electric ladder method was carried out in the known goaf. And the parameters suitable for the detection of water accumulated in goaf in the area were found. The selected parameters were used to carry out the comprehensive geophysical exploration test of the transient electromagnetic method and induced electric ladder method in the No.2 coal seam of Qinyu mining area. Firstly, the transient electromagnetic method was used to detect the water accumulated in goaf, and then the induced electric ladder method was used to verify the state of water accumulated in goaf, and 8 suspected goaf water accumulated areas were determined. Through the drilling verification of 8 abnormal areas measured by comprehensive geophysical exploration method, water poured out, which proved that the combination of transient electromagnetic method and induced electric ladder method had high reliability.
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