大采高综采面过上覆煤层采空区矿压规律研究

摘要

In order to master the strata pressure law of fully-mechanized mining face with 5m cutting height passing through upper goaf , base on the strata pressure observation of the №12301 mining face in Shangwan Mine , the influence mechanism of goaf was analyzed .The results show that when the mining face through the goaf area , the stability of roof structure is the main reason caused the variation of periodic weighting distance , pressure strength and dynamic loading coefficients .%为了掌握5m大采高综采工作面进入上覆煤层采空区的矿压显现规律，基于上湾煤矿12301工作面矿压实测结果，从顶板结构变化的角度对采空区作用机理进行了分析。结果表明，进入上覆煤层采空区后工作面周期来压步距为13.6 m，小于实体煤下周期来压步距15.6 m，减小了12.8％。在采空区下，周期来压强度要比实体煤下大7.7％，动载系数大8.2％。下煤层开采时上覆岩层顶板结构的稳定性是导致周期来压步距、来压强度和动载系数出现差异的根本原因。