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| Study on the mechanism and control technology of floor water outburst in No.2-301 Face of Ganhe Mine |
| Song Tuan |
| Ganhe Mine, Shanxi Coking Coal Huozhou Coal and Electricity, Linfen 041602, China |
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Abstract Taking the floor water outburst event of No.2-301 Face in Ganhe Mine as the research object, through theoretical analysis and calculation, field measurement, effect verification and other research methods, the water outburst source, water outburst channel and control mode were studied. The results showed that the mining of No.2 coal seam in Ganhe Mine was mainly threatened by the Ordovician limestone aquifer in the floor. The source of water outburst from the floor of the 2-301 working face was Ordovician limestone water, and the water outburst channel was the water conduction of the hidden collapse column. The control scheme of combining the cover and the blocking source was adopted. The filling coefficient of the cap area reached more than 85 %, and the Ordovician limestone water was effectively blocked. Good economic and social benefits had been achieved, which provided reference experience for similar mines.
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