摘要
关家崖矿8#煤层8101工作面对应的上煤层7#和下煤层11#均已回采,对8#煤层的顶底板岩层造成一定破坏,同时8#煤层采动过程中,将会对顶底板围岩造成二次破坏。为研究采动期间8#煤层顶底板围岩复合破坏特征,对上覆岩层"三带"分布、底板破坏深度及顶底板垂直应力和塑性区分布规律几个方面进行了分析,得出7#煤层部分区域处于8#煤层垮落带内,8#煤层工作面过7#、11#煤层煤柱时应力集中现象明显,回采时应采取相应的安全开采技术措施,以保证本煤层的安全高效开采。
In 8101 mining face in some mine, the upper 7# coal seam and lower 11# coal seam corresponding to the 8; coal seam have been extracted, which has caused certain destruction to the strata of roof and floor of the 8# seam, and meanwhile, the mining of 8# coal seam will cause a second destruction to the surrounding rock of its roof and floor. In order to study the compound failure features of the surrounding rock of the roof and floor of 8# coal seam during mining process, the paper analyzes the aspects of distribution of ＂three zones＂ in overlying strata, the depth of floor strata failure, vertical stress of the roof and floor and distribution of plastic zone, and comes to the conclusion that part of 7# coal seam lies in the caving zone of 8# coal seam and stress concentration phenomenon is obvious while the working face of 8# coal seam advances passing the coal pillars of 7# and 11# coal seams, so the corresponding safe technical measures should be taken to ensure the safe and efficient mining in the 8# coal seam.
出处
《中国煤炭》
北大核心
2013年第4期48-52,共5页
China Coal
关键词
近距离煤层
采动影响
复合破坏
数值模拟
close-distance coal seams, mining influence, compound failure, numerical simu-lation
