采矿与安全工程学报2017，Vol.34Issue(3)：437-443,7.DOI:10.13545/j.cnki.jmse.2017.03.006
松散承压含水层下重复采动对覆岩破断特征的影响研究
The influence of repeated mining on failure characteristic of overburden strata under unconsolidated confined aquifer
摘要
Abstract
With the issue of prevention of support crushing and water inrush disaster during mining under unconsolidated confined aquifer,the influence law of repeated mining on failure characteristic of overburden strata under unconsolidated confined aquifer was studied combining the mining condition of Panel 7131 in Qidong Coalmine in northern Anhui.The results have shown that for one working face under unconsolidated confined aquifer threatened by support crushing and water inrush disaster in the first mining conditions,when its adjacent coal seam gets mined first,this working face would be in the repeated mining state;as a result,the structural integrity of overburden is reduced,and the effect of aquifer's load transfer would be weakened by mining disturbance;therefore when this working face is being mined,the overburden strata is less prone to break as a whole than the first mining conditions,and the risk of support crushing and water inrush disaster decreases as well.Based on the in fluence law of repeated mining on failure characteristic of overburden strata under unconsolidated confined aquifer,the method of "relieving mining" was put forward to prevent support crushing and water inrush accident.In this method,the coal seam without the risk of support crushing and water inrush accident can be a pressure relief layer,which would weaken the effect of load transfer of confined aquifer,and avoid the occurrence of integral breakage of overburden during the first mining in coal seam group.关键词
松散承压含水层/载荷传递/重复采动/整体破断Key words
unconsolidated confined aquifer/load transfer/repeated mining/integral breakage分类
矿业与冶金引用本文复制引用
王晓振,许家林,吴玉华,王欢,韩红凯,季英明..松散承压含水层下重复采动对覆岩破断特征的影响研究[J].采矿与安全工程学报,2017,34(3):437-443,7.基金项目
国家自然科学基金项目(51404246) （51404246）
江苏省自然科学基金项目(BK20140205) （BK20140205）
江苏高校优势学科建设工程项目 （）
中国矿业大学优秀创新团队资助项目(2014ZY004) （2014ZY004）
