青磁窑矿薄煤层开采矿压显现规律研究

Study on Mine Pressure Appear Law in the Process of Mining the Thin Coal Seam in Qingciyao Mine

本文以同煤集团青磁窑矿8206工作面为工程背景,理论分析并结合采出率和实际采煤条件,得知工作面上覆岩层垮落带高度范围为3.56 m^7.96 m,断裂带高度范围为26.2 m^34.5 m,在裂隙带以上的岩层形成弯曲下沉。通过数值模拟和现场实测研究表明,随着开采范围的加大,最大垂直应力值不断增大;覆岩层的位移场自开切眼处,就以拱形结构一直向前发展,随着工作面的不断推进,拱形的高度及范围也在不断的扩大,工作面顶板的破坏范围及高度逐渐在扩大。为该矿井稳产高效提供指导意义。

In this paper, the 8206 working face in Qingciyao Mine of Datong Coal Mine Group as the engineering background, by the theoretical analysis and combining with the mining rate and the mining conditions, it is concluded that the caving zone height of the overlying rock of working face ranges from 3.56 m to 3.56 m, the fault zone height ranges from 26.2m to 34.5m, the rock above the fissure zone bends down. Through the numerical simulation and field measurement, the study shows that the maximum vertical stress value increases with the increase of mining areas; the displacement field of the strata since the cut has kept developing with the arch structure, as the working face mining, the height and scope of the arch are expanded, and the damage range and height of working face roof are expanded gradually too. The guiding significance is provided for the safety and efficiency of the mine.