煤层群开采条件下的保护层卸压效应研究  

Research on Pressure Relief Effects of Protective Layer Under the Conditions of Coal Seam Group Mining

作　　者：张敬民[1] 刘贞堂[1] 谢龙[2] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤矿安全》2012年第9期14-16,共3页Safety in Coal Mines

基　　金：国家自然科学青年基金资助项目(40904028);全国博士学位论文作者专项资金资助项目(201055);教育部新世纪优秀人才支持计划资助(NCET-10-0768);江苏省"青蓝工程"资助项目

摘　　要：随着工作面的推进,煤层群开采后将引起上覆岩层的变形、冒落及下伏岩层的移动、膨胀,使开采空间周围原有应力平衡状态受到破坏,引起应力的重新分布,从而在顶、底板中产生不同的应力应变场,进而对顶、底板岩层产生不同的破坏,而使被保护层产生了不同的卸压效应,同时通过FLAC3D软件对煤层群开采过程中上覆及下伏岩层的应力变化规律及移动变形规律进行了研究。With the advancing of working face, the deformation of overburden, caving and underlying rock movement and expansion will be caused by coal seam mining, which damages the original stress equilibrium around the mining space, and leads to the stress redistri- bution. Different stress and strain fields was generated in the roof and floor, which produces different damage to the roof and floor rock, and generates different pressure relief effects to. protective layer. A simulation research on coal seam group mining is carried out to ob- tain the laws of stress change and deformation of overlying and underlying rock by the FLAC3D software.

关 键 词：煤层群开采 解放层 卸压效应 数值模拟 移动变形规律 

分 类 号：TD322.5[矿业工程—矿井建设]