黄土地区煤矿地表水防排水研究

Coalmine surface water prevention and drainage in loess area

目前国内对煤矿水害及防治研究多集中于对地下水水源产生的水害研究,对地表水诱发的煤矿水害研究较少。文章重点关注北方黄土地区煤矿地表水防治问题,为黄土地区的煤矿地表水害提供防治措施。通过对中煤平朔集团安家岭煤矿的研究,利用概率积分法、FLAC3D数值模拟方法对安家岭井工1矿4106~4109工作面地表移动规律进行研究模拟,预测开采后地表变形情况和平均影响半径,评价采动区内地表水渗漏的危险性。结果表明：根据经验公式与数值模拟方法计算采区＂两带＂（垮落带与导水裂缝带）发育高度约为171.8 m;采煤产生的地表积水区与导水裂缝带会对煤矿开采产生威胁;采取拦截工作面以外外围来水,就近取土适时填筑凹陷区,及时排除渗入矿井内部的积水等措施解决地表水渗漏问题对煤矿安全生产的影响。

At present, researching on mine water disaster and prevention most focused on groundwater cause, while studying on surface water causing disaster prevention was deficiency. The paper focused on the disaster prevention which caused by surface water in loess area and gave the controlling measures to solve the problem caused by surface water disaster. The authors used probability integral method and FLAC3~ to make numerical modeling on forecasting surface movement with average influencing radius of 4106-4109 coal faces of Anjialing Mine and evaluated the poten- tial risk of the surface water leakage. The results show that, the height of the water flowing fractured zone is 171.8 m which is calculated by numerical modeling prediction and empirical formula;the water accumulated area and the water flowing fractured zone will endanger the coal mining; intercepting the water coming out of the coal faces, filling the sag with nearby soil, and draining off the water in the mines on time can solve the surface water disaster.