矿业科学学报2025，Vol.10Issue(3)：477-488,12.DOI:10.19606/j.cnki.jmst.2025010
跨煤柱开采覆岩运动与载荷传递特征三维相似模拟研究
Three-dimensional similarity simulation research on the overburden movement and the characteristics of load transfer in crossing-pillar mining
摘要
Abstract
In the process of mining across the overlying residual coal pillars in the lower coal face(re-ferred to as crossing-pillar mining),the residual coal pillars are subjected to high supporting pressure,which may lead to disasters such as roof caving,pressure crushing,roadway damage and coal burst in the lower coal face.A three-dimensional similarity simulation experiment was carried out to study the movement patterns of the overburden and the load transfer characteristics of the coal pillars during crossing-pillar mining.The results show that:With the mining of the working face on both sides of the residual coal pillar,the stress distribution of the interbedded rock strata changes significantly,the angle of influence of the coal pillar stress is approximately 7° in unilateral mining,and increases to 39° in two-sided mining,and the working face starts to be affected by the concentration of stress in the coal pillar when it is about 32 m away from the residual coal pillar.After the working face of the lower coal seam enters the mining below the coal pillar,the coal pillar in the goaf gradually yielded and was unlo-acled.This results in the transfer of the overburden load to the complete coal pillar in front of the work-ing face,leading to stress concentration,which led to the main key stratum instability induced by the fracture of the interlayer rock layer when the working face was advanced to 5m from coal pillar,and the intense ground pressure appeared.关键词
煤柱/跨煤柱开采/岩层控制/三维相似模拟/覆岩载荷传递Key words
coal pillar/cross-pillar mining/strata control/three-dimensional similarity simulation/o-verburden load transfer分类
矿山工程引用本文复制引用
曹丁园,潘瑞凯,白锦文,冯国瑞,屈锦波,李浩男,李宇飞..跨煤柱开采覆岩运动与载荷传递特征三维相似模拟研究[J].矿业科学学报,2025,10(3):477-488,12.基金项目
国家自然科学基金(52204102) （52204102）
国家杰出青年科学基金(51925402) （51925402）
山西省基础研究计划(202103021223392) （202103021223392）
