偃龙矿区三软煤层水体下采煤技术研究

Study on mining technology under "Three Soft" coal seam under water body in Yanlong Mining Area

根据典型的三软不稳定煤层煤矿的采区地质采矿资料及地表移动观测资料,对三软不稳定煤层开采在水库水体下的影响程度进行了准确的预测和评价,并对三软不稳定煤层开采引起的地表移动和变形进行了预测。结合有限元数值模拟研究和分析,对水库水体下三软不稳定煤层开采安全性进行深度剖析,确保水库水体下及堤坝的安全有效运行。对采矿区域的覆岩隔水安全性、裂缝发育影响、堤坝沉降影响等进行了技术研究,同时,对水库水体下三软不稳定煤层开采安全性进行深入、系统性的技术性研究。研究对于促进煤炭资源的解放,缓解矿山置换的迫切形势,防止和减轻开采造成的损害,保护水库、大坝等地表结构具有重要的理论和现实意义。

Based on the geological and nfining data and the surface movement observation data of the typical ＂Three Soft＂ unstable coal seam coal nfine,the influenee degree of the ＂Three Soft＂ unstable coal seam under the reservoir water was accurately predicted and evaluated, and the prediction of surface movement and deformation caused by the ＂Three Soft＂ unstable coal seam nfining were also earried out. Combined with the finite element numerical sinmlation research and analysis, the safety of the ＂Three Soft＂ unstable coal seam nfining under the reservoir water was analyzed in depth to ensure the safe and effective operation of the dam under the water body of the reservoir. The safety of overlying rock water isolation, the influenee of fracture development and the impact of embankment settlement on the mining area were studied. At the same time, the safely of the ＂Three Soft＂ unstable coal seam mining under the water body of the reservoir was deeply and systematically studied. The study of this paper has important theoretical and practical significance on promoting the liberation of coal resources, alleviating the urgent situation of mine replacement, preventing and reducing the damage caused by mining, and protecting the surface structure of the reservoir and dam.