神东矿区浅埋煤层开采覆岩移动与裂隙分布特征  

Overburden movement and fracture distribution induced by longwall mining of the shallow coal seam in the Shendong coalfield

作　　者：范钢伟[1] 张东升[1] 马立强[1] 

机构地区：[1]中国矿业大学矿业工程学院煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2011年第2期196-201,共6页Journal of China University of Mining & Technology

基　　金：新世纪优秀人才支持计划项目(NCET-05-0480);国家自然科学基金项目(50904063);煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM08X2)

摘　　要：以神东矿区3类典型的煤层赋存条件为主要研究对象,采用实验室相似材料和计算机数值模拟的方法,分析了浅埋煤层长壁开采覆岩移动与裂隙在水平方向和垂直方向的扩展与分布的动态演变特征.研究表明,随工作面的推进,覆岩会出现与地表同步垮落现象;工作面推进越快,裂隙扩展的时间越短,裂隙闭合也越快;覆岩强风化带的存在,有利于消解部分采动裂隙.Physical and numerical simulations were used to analyze the dynamic propagation and distribution of overlying fractures in horizontal and vertical planes that are caused by longwall mining in shallow coal seams.The Shendong coal field was used to provide the three representative geological conditions for the analysis.The results show that the overlying strata collapses in synchronization with surface subsidence.The faster the working face advances the more slowly fractures develop and the faster fractures close.The strongly weathered rock in the overlying stratum can adsorb a portion of the mining-induced fractures.

关 键 词：浅埋煤层 覆岩移动 采动裂隙分布 关键层 模拟分析 

分 类 号：TD325[矿业工程—矿井建设]