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| esearch and application of full period water damage control technology for high pressure ordovician limestone water working face |
| Wu Wenqing |
| Jizhong Energy Fengfeng Group Co., Ltd., Handan 056200, China |
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Abstract From the analysis of the sudden water (outburst) situation in the mining of wild green coal seam in Jiulong Mine, the deep mining of the mine shows different hydrogeological laws from the shallow mining. In the deep mining, not only the Daqing limestone water should be prevented, but also the Ordovician limestone water should be prevented, which is a more complex water prevention problem encountered in the mining of deep coal seam in Jiulong Mine. In order to solve the technical problems of water prevention and control, the 15449N working face of Jiulong Mine was taken as the research object. Through the analysis of hydrogeological condition and the water damage factors influence on the mining wild green working face, the water damage prevention and control method of three-dimensional drainage grouting and dynamic comprehensive treatment combined with up and down wells was determined. Through the reconstruction before mining, reinforcement during mining and treatment after mining, the scattered water outburst points in working face have been sealed dynamically, the weak blocks have been reinforced, the slurry coverage rate and grouting quality have been improved, which achieves the water retention mining purpose. The actual effect is remarkable.
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