双鸭山新安矿高水充填沿空留巷实验研究

Experimental research on gob-side entry retaining packed by high water content material in Shuangyashan Xin'an coal mine

为了双鸭山具有相似地质条件的矿井提供技术参考,通过相似模拟与数值模拟对双鸭山新安矿充填开采进行综合分析,绘制开挖不同位置时位移观测和压力载荷观测图,得到充填体上覆岩层的位移及压力载荷的分布规律。研究结果表明:采空区顶板的冒落压实会减弱充填开采过程中充填体的应力集中,坚硬顶板破断形成的结构体会对其上下岩层进行卸栽。

This paper is an attempt to provide technical references for the coal mines with similar geological conditions in Shuangyashan.The paper introduces a comprehensive analysis of the filling mining of Xin＇ an mine in Shuangyashan using similar and numerical simulation and a production of displacement and stress load observation figures varying with locations,and features the law governing the distribution of displacement and load pressure of backfill overlaying stratum.The result suggests that the compaction created by gob roof caving in the process of backfill mining tends to trigger a reduction in the stress concentration of backfills and the structure resulting from hard roof fracture tends to leave its upper and lower strata unstable.