STABILITY ANALYSIS OF SURROUNDING ROCK MASSES OF ROADWAY UNDER OVERHEAD MINING
近距离跨采对巷道围岩稳定性影响分析

Considering the relative position of working face and the floor roadway,the stress evolution of surrounding rock masses,rock displacement around floor roadway induced by overhead mining,and the roadway stability at different position are analyzed in detail by numerical simulation. The results show that the abutment pressure distribution on coal pillar is the direct reflection of abutment stress induced by mining on the interfaces of coal seam and immediate roof. The rock displacement around roadway under nearby overhead mining is influenced by the whole displacement induced by mining as well as abutment pressure on the coal pillar. The floor roadway should be located out of the abutment stress zone when protection coal pillar is retained,or the working face should be pushed away for enough distance under overhead mining. The study result is proved by a case analyzed.