缓倾煤层采空区上覆岩体变形特征物理模拟研究  

Physical modeling on deformation characteristics of overlying rock mass above mined-out area in gently inclined coal seam

作　　者：赵建军[1] 蔺冰[1] 马运韬 张晓东[1] 兰志勇[1,2] 黄润秋[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]四川省蜀通勘察基础工程有限公司,四川成都610081

出　　处：《煤炭学报》2016年第6期1369-1374,共6页Journal of China Coal Society

基　　金：国家科技支撑计划资助项目(2015BAK09B01);地质灾害与地质环境保护国家重点实验室基金资助项目(SKLGP2013Z005);国家重点基础研究计划(973)资助项目(2013CB733202)

摘　　要：以贵州马达岭滑坡所在的自然边坡为原型,通过框架物理模型试验,研究了缓倾煤层采空区上覆岩体沿岩层走向方向的变形过程,分析采动滑坡变形破坏机制。研究结果表明:煤层开采后,上覆岩层发生应力重分布,采空区边界形成拉应力集中区;上覆岩层产生以沉降为主的弯曲变形,而在坡肩和坡脚部位产生较明显水平向外位移;变形过程中先在采空区后边界部位产生裂缝,回采煤柱后,裂缝贯通,形成潜在滑面。Using Madaling landslide in Guizhou Province as a case,based on physical modeling,this paper studied the deformation process and mechanism of overlying rock mass above a mined-out area in gentle inclined coal seam. As a result,the mining landslide deformation mechanism could be described as follow： firstly,the coal mining leads to the stress redistribution of overlying rock mass and tensile stress concentrated area along mined-out boundary. Secondly,the overlying rock mass subsides and generates bending deformation. At the same time,the shoulder and toe region of the slope moves outward and generates horizontal displacement. Thirdly,cracks generate at the back edge of the minedout area. After mining coal pillars,the cracks further extend and gradually form potential sliding surface combining mined-out area.

关 键 词：模型试验 采空区 相似材料 变形 

分 类 号：TD315[矿业工程—矿井建设] TU452[建筑科学—岩土工程]