基于上行开采的上部煤层变形研究

Research on deformation of upper coal seam based on ascending mining

为了定量研究上行开采过程中上部煤层变形特征,从而制定相应的煤层采掘措施.采用数值模拟和相似材料模拟2种方法对矿井上行开采的可行性和上部煤层的变形及位移进行了分析.根据数值模拟和相似材料模拟结果：下部煤层的导水裂缝带发育高度为51.9-67.0 m,小于与上部煤层的层间距149 m,可以采取上行开采的方式;在此基础上,定量评价了上部煤层的变形,最大位移为1.30-1.82 m,并且从巷道掘进、矿压控制和回采时间间隔等方面制定了相应的措施.基于数值模拟和相似材料模拟分析上行开采的可行性和上部煤层变形可以作为上部煤层巷道掘进和工作面回采的依据.

In order to research the deformation characteristics of upper coal seam in the process of ascending mining quantitative, based on it, recovery and excavation measures can be formulated. The methods of numerical simulation and similar material simulation were adopted to analyzed the feasibility of ascending mining, deformation and displacement of upper coal seam. The results show that the fractured zone height of lower coal seam is 51.9-67.0 m, less than the distance between upper and lower coal seam（ 149 m）, ascending mining can be adopted. On this basis, the deformation of the upper coal seam is quantitative evaluated and the maximal displacement is 1.30- 1.82 m. The corresponding measures of tunnel＇ s excavation, pressure control and recovery time interval can be formulated. The feasibility of ascending mining and deformation of upper coal seam based on numerical simulation and similar material simulation can be evidence for recovery and excavation of upper coal seam.