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| Study on water abundance zoning and water drainage scheme of No.3 coal roof in No.1 panel of Majiliang Mine |
| Qin Ziqiang |
| Majiliang Mine，Jinneng Holding Coal Industry Group, Datong 037027， China |
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Abstract In view of the water inflow phenomenon in the mining and excavating process of No.3 coal working face in No.1 panel of Majiliang Mine, combined with the actual situation of the mine and the characteristics of roof overburden and hydrogeology of the working face, the water abundance zoning of the No.8117 Face was carried out, and the technical scheme of roof draining water during mining and excavating of the working face was formulated. The results showed that the total amount of water drainage in the roof aquifer was 5.038 million m3, the dynamic recharge was 357.27 m3 / h, and the residual water drainage was 296.5 m3 / h, which achieved the expected effect. The static reserves of the aquifer were effectively drained to ensure the safe mining of the working face.
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