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| Accumulated water control technology of downhill roadway excavation in coal mine |
| Yu Guilong |
| Duanwang Mine, Shanxi Shouyang Duanwang Coal Industry Group Limited Company, Jinzhong 045400, China |
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Abstract Water accumulated in roadway seriously affected the unit progress level and construction safety of downhill roadway excavation. The improved drainage technology of adding air pump and moving water tank and other drainage facilities to the downhill excavation face, and the new drainage technology of using hose drainage instead of flume drainage to the water inflow of the back roadway roof and floor, were applied in various mines of Jizhong Energy Resources Group Co., Ltd. The results showed that the new drainage technology could reduce the pump equipment damage, reduce the drainage auxiliary work, and greatly reduce the adverse effect of accumulated water on the downhill roadway excavation.
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