【摘要】 依据刘东煤矿的煤层地质及生产技术条件,采用数值模拟分析和现场实测的方法,研究了极近距离煤层联合开采时采场覆岩活动特征和矿压显现规律。研究结果表明,极近距离煤层联合开采上覆已破断岩层可再次形成稳定结构,在端头区覆岩结构的形成有利于集中运输巷道的维护;下位煤层工作面矿压显现缓和,支架承受静载荷作用明显,工作面来压和支架载荷具有整体一致性的特征。更多还原

【Abstract】 Based on the coal geology and coal production technology of Liudong coal mine,by using the numerical simulation and field measurement methods,the overburden rock activity characteristics and laws of pressure behavior are studied when the very contiguous seams combined mining. The results show that the combined mining seams overlying rocks which have been broken off can be re-formed a stable structure. The overlying rock structure that formed in end zone is conducive to centralized maintenance roadway transportation. Face strata behavior in lower seams has eased,and the support static loads obviously,and the characteristics of face pressure and support load have overall consistency.更多还原