下伏煤层开采引起的大巷变形规律模拟研究

针对泉沟煤矿要采出-115大巷下压煤，同时要保证上部的大巷正常使用的技术难点，进行了下伏煤层开采大巷围岩活动规律的模拟分析.研究了下伏两煤层开采引起的岩层运动规律及其对-115大巷造成的影响.此外，采用RFPA数值模拟系统，就大巷支护方式、下伏煤层与大巷距离、下伏煤层开采顺序等因素对-115大巷围岩稳定性造成的采动影响的普遍规律进行了系统分析，并提出相应措施.研究结果表明：-115大巷的原支护不能保持其稳定性，通过采用必要的加强支护措施后，大巷的稳定性是有保证的.

Simulation analysis of surrounding rock deformation law of main entry with the below seams mined

To solve the difficulties of mining the coal seams underlie the-115 main entry without destroying the main entry in the Quangou coal mine,the simulation analysis of surrounding rock movement regularities of the main roadway with the underlie coal seams mined was carried out.The strata movement regularities resulted from the two underlie coal seams mined and its effects to the-115 main entry were studied.Based on these,through the RFPA numerical simulation,the mining influence of the distance between the main entry and the underlie coal seams,the support method of the main entry and the mining order of the underlie coal seams to the main entry was systematically analyzed,and corresponding measures were put forward.The study result indicates that though the-115 main entry can not keep maintain stability with the original supporting system,its stability can be guaranteed after the necessary reinforce measures was performed.