朝克乌拉煤矿承压含水层下2煤安全开采研究

Research on safety mining of No. 2 coal seam under confined aquifer in Chaokewula coal mine

针对新建朝克乌拉煤矿承压水下安全开采问题,通过相似材料模拟实验,分析并得出了朝克乌拉煤矿2煤不同开采厚度下的"三带"发展形态和垮落带、导水裂隙带厚度。经与"三下"开采规程等经验公式计算作对比分析,结果表明,相似试验和经验公式预测2煤开采导水裂隙带高度的吻合性较好,确定"裂采比"为11.0。据此控制开采高度,以有效控制导水裂隙带发育高度,指导并实现承压水下煤层的安全开采。

Aiming at the problem of safety mining under confined water in new Chaokewula coal mine,the development shape of ' three- zone' and the thickness of caving zone and water flowing fractured zone under different mining thickness of No. 2 coal seam in Chaokewula coal mine were analyzed through the similar material simulation experiments. Compared to calculation results by empirical formula of ' three- under' mining regulation,the predicted heights of water flowing fractured zone in No. 2 coal seam showed good coincidence between the similar test and empirical formula,and the ratio of height of fractured zone to mining height was 11. The results can be used to control the mining height,control the development height of water flowing fractured zone effectively,so as to guide and realize the safety mining of coal seam under confined water.