采矿与安全工程学报2017，Vol.34Issue(3)：431-436,443,7.DOI:10.13545/j.cnki.jmse.2017.03.005
泥、砂岩交互地层综放开采覆岩破坏高度的确定
Determination of overburden failure height in alternate strata of mudstone and sandstone with fully mechanized caving method
摘要
Abstract
In order to determine the overburden failure height in alternate strata of mudstone and sandstone with fully mechanized caving method,with the fully mechanized caving face N1102 in Yuwu coal mine as an example,the overburden failure during mining in this face was researched through several methods.The results have shown that the maximum height of overburden failure calculated through the key stratum theory and mechanic analysis of soft and hard rock breaking is 61.04 m,and it is concluded that overburden failure development is affected by those key layers:when its critical height (no free space under the corresponding rock) is between the heights of adjacent key layers,the accurate overburden failure height is affected by lithology of the strata between the adjacent layers and the free space under the rock.The overburden failure height determined through analyzing images measured by borehole TV and numerical simulation was between 50 m and 63 m.Hence,the development characteristics of soft and hard rocks' fractures after mining were obtained.关键词
泥砂岩交互地层/综放开采/采动裂隙/关键层/覆岩破坏高度/钻孔电视法Key words
alternate strata of mudstone and sandstone/fully mechanized caving/mining-induced fractures/key stratum/overburden failure height/borehole television method分类
矿业与冶金引用本文复制引用
陈亮,吴兵,许小凯,商荣亚..泥、砂岩交互地层综放开采覆岩破坏高度的确定[J].采矿与安全工程学报,2017,34(3):431-436,443,7.基金项目
国家自然科学基金项目(51274205) （51274205）
