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| Research and application of water damage control technology for deep Shanqing mining under the condition of strong runoff zone |
| Wu Wenqing |
| Jizhong Energy Fengfeng Group Co., Ltd., Handan 056200, China |
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Abstract Sunzhuang mine field is located in the strong runoff zone in the southwest of Heilongdong spring area. Affected by hydrogeological conditions, deep mining shows different hydrogeological laws from shallow mining, and deep mining is threatened by double water damage. At present, after nearly 50 years of mining, the remaining recoverable reserves of the mine are 3.323 million tons, of which the deep Shanqing coal threatened by Daqing limestone water and Ordovician limestone water is 2.472 million tons, accounting for 74.4 % of the total mine recoverable reserves. If the deep Shanqing coal threatened by water is not liberated, the mine will face a severe situation of closure. In order to solve the technical problem of water prevention and control, through the analysis of the hydrogeological conditions of the mine, it was decided to use the method of surface regional control to grout and reinforce the Daqing limestone aquifer, so that it could be transformed into a weak aquifer or a relative aquiclude, which blocked the supply channel of the Ordovician limestone aquifer to the overlying thin limestone, and enhanced the water barrier capacity of the coal seam floor, so as to solve the problem that the mining of deep Shanqing coal seam was threatened by ' double ' water damage.
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