坚硬顶板煤层开采底板破坏深度研究  

Study on Depth of Destroyed Floor with Hard Roof Coal Mining

作　　者：李涛 王苏健 陈通 高颖 

机构地区：[1]陕西煤业化工技术研究院,西安710065 [2]煤炭绿色安全高效开采国家地方联合工程研究中心,西安710065

出　　处：《煤炭技术》2015年第3期12-13,共2页Coal Technology

基　　金：国家重点基础研究发展计划(973)项目(2014CB047100);国家自然科学基金项目(41172290)

摘　　要：针对研究区11煤坚硬顶板的特性,采用理论计算和现场实测研究了坚硬顶板煤层开采底板破坏深度。结果表明:坚硬顶板条件下工作面超前应力集中系数和塑性区宽度变大,导致底板破坏深度增加。坚硬顶板相比中硬顶板煤层开采底板破坏深度约增大23%。According to characteristics of hard roof for No.11 coal seam in study area, theoretical calculation and site measurement had used for study on depth of destroyed floor with hard roof coal mining. The results show that hard roof causes stress concentration factor and width of plastic area in advance mining face largen. Then they make depth of destroyed floor largen. Compared to depth of destroyed floor with mid-hard roof coal mining, depth of destroyed floor with hard roof coal mining improves 23%.

关 键 词：坚硬顶板 底板破坏深度 应力集中系数 塑性区 

分 类 号：TD327.2[矿业工程—矿井建设]