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| Research on precise prevention and control technology of floor water in No.3307-2 Face of Sangshuping Mine |
| Wang Minghe |
| Shaanxi coal Hancheng Mining Co., Ltd. Sangshuping No. 2 well, Hancheng 715407, China |
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Abstract The water abundance and permeability of the confined aquifer in the coal seam floor of Sangshuping Mine are extremely uneven. In order to realize the safe mining of No.3307-2 Face, three abnormal areas were detected by implementing audio electrical perspective. The drilling holes in the abnormal area had different degrees of water outflow. After the drainage, the water inflow of all drilling holes was less than 0.5 m3/ h. After the drainage, the grouting reinforcement project was carried out, and a total of 159 bags of cement were injected. Finally, the safe mining of No.3307-2 Face was realized, which proved that the precise water prevention and control technology combined with audio electrical perspective, drilling and grouting was effective. It provided technical reference for the follow-up water prevention and control work of the mine.
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