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| Study on the technology of parallel electrical method to explore roof water abundance area in No.8101 Face of Dongfeng Mine |
| Guo Bin |
| Xinzhou Emergency Management Bureau, Xinzhou 034000, China |
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Abstract In the process of coal mining, the accumulated water in the overlying goaf of coal seam was one of the important factors causing water outburst accidents, which seriously affected the safety production of the lower working face. In order to realize the safe production of No.8101 Face in Dongfeng Mine, through the analysis of the geological and hydrogeological conditions of the working face, the parallel electrical method was used to explore the water abundance of the roof of No.8 coal seam at different heights, and the low-lying area of the overlying No.7 coal seam goaf was found to be ' y ' -shaped distribution. Three exploratory boreholes were constructed in the roof of the lower roadway at 350,370 and 390 m of the upper side roadway to drain the water in the goaf. The total water inflow of the borehole was 9.2 m3 / h when the hole was formed. After 11 days of drainage, the sum of the final water inflow was reduced to 0.8 m3 / h, and the safe mining of the No.8101 Face was realized. It provided experience for other working faces to explore the water abundance abnormal area of the roof.
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