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| Comprehensive control of water disaster in large water working face under main water filling aquifer |
| Zhang Peng |
| Kailuan ( Group ) Qianjiaying Mining Industry Branch, Tangshan 063301, China |
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Abstract In this paper, taking No.2077 west Face of Qianjiaying Mine as an example, the comprehensive prevention and control measures of large water working face were studied. The No.2077 west Face of Qianjiaying Mine was the lower working face of the tenth mining area. The sandstone fracture aquifer water of No.5 coal seam roof was the main water-filled aquifer of Qianjiaying Mine, and the roof water of No.7 coal seam was fully supplied. In the mining process of No.2075 west, No.2076 west and No.2075 east, No.2076 east of the working face, large water inflow occurred. The actual maximum water inflow of No.2075 west was 2.0 m3/min, the actual maximum water inflow of No.2076 west was 0.3 m3/min, the actual maximum water inflow of No.2075 east was 4.5 m3/min, the actual maximum water inflow of No.2076 east was 1.2 m3/min. And the area was affected by Nanyangzhuang anticline, the geological structure was dense, the thickness and fluctuation of coal seam changed greatly, which brought great difficulties to water prevention and control work. By analyzing the hydrogeological conditions of the working face in advance, a safe and effective water prevention and drainage project was constructed. And a comprehensive detection method combining geophysical prospecting and drilling was used to reduce the production and drainage cost and ensure the safe and efficient production of the working face. The study provided reference experience for future water prevention and control work.
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