东海煤矿深部回采工作面矿压规律

Rock pressure of deep mining working face of Donghai coal

为了得到深部回采工作面的矿压显现规律,采用相似模拟、理论分析、数值模拟与现场观测相结合的方法,对东海煤矿32#煤层左九工作面顶板活动规律,上覆岩层移动、破坏规律以及支承压力的分布规律进行了理论分析与实践研究,得出了该工作面顶板活动的各项参数和上覆岩层移动、破坏的范围以及支承压力的分布变化规律。研究表明,深部开采工作面随着采深增加,支承压力有所增加,支柱载荷也增大,但顶板活动规律、上覆岩层移动规律与浅部开采相比变化不明显。该结论为龙煤集团同类矿井进入深部开采阶段采场围岩控制设计提供了参考依据,对其他同类矿井具有很好的借鉴作用。

Aimed at investigating the laws of rock pressure in deep mining working face, this paper describes the theoretical analysis and study of Donghai coal 32# seam left 9 working face＇ s roof movement, overlying strata movement, damage, and abutment pressure by combining the method of analog simulation, theoretical analysis, and numerical simulations with field observation and provides the parameters of the roof activity and laws governing overlying strata movement, the scope of destruction, and pressure support. The study concludes that the increased mining depth triggers the increased abutment pressure and the consequent pillar increase, but the roof movement and overlying strata movement show fewer changes than shallow mining. This conclusion provides a reference for controlling surrounding rocks in other coal mines with similar conditions in Longmay Mining Group Co Ltd.