浅埋薄基岩煤层群综采工作面矿压显现规律研究

Study on the law of mining pressure in the comprehensive mining face of shallow buried coal seam group

针对鄂尔多斯地区浅埋深、薄基岩、厚表土条件下近距离煤层群开采过程中存在的特殊岩层控制问题,基于“关键层”理论并应用UDEC数值模拟软件,结合寸草塔二矿开采实践和现场监测的相关数据,分析了浅埋煤层“关键层”结构的破断特征,深入研究总结了工作面的矿压显现规律及浅埋煤层群开采时上下煤层开采的围岩结构特点和相互的影响关系,对在类似条件下的煤层开采具有重要参考意义。

Based on the theory of key layer and the application of UDEC numerical simulation software,combined with the mining practice of Cuncaota Mine and the relevant data from the field monitoring,the fracture characteristics of the key layer structure of the shallow buried coal seam was analyzed,and the structural characteristics of the overlying rock of the shallow buried coal seam group,the law of mining pressure appearance of the working face,and the structural characteristics and mutual influence relationship between the surrounding rock of the upper and lower coal seam mining in the shallow buried coal seam group were summarized,with important reference significance for the coal seam mining under similar conditions.