深部采动覆岩移动变形致灾的试验分析  

Experimental analyses of strata movement deformation catastrophe caused by deep coal mining

作　　者：刘书贤[1,2] 魏晓刚[1] 麻凤海[3] 王伟[1] 王泓懿[4] 

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000 [2]辽宁工程技术大学建筑工程学院,辽宁阜新123000 [3]大连大学建筑工程学院,辽宁大连116622 [4]阜新宇城建筑设计有限公司,辽宁阜新123000

出　　处：《水文地质工程地质》2013年第4期88-92,105,共6页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(51174038);辽宁省教育厅科学技术研究项目(L2012111);中国煤炭工业协会科研项目(MTKJ2012-319);辽宁工大市场调研基金(SCDY2012010)

摘　　要：针对深部开采条件下覆岩移动变形引起的安全问题,采用理论分析、相似材料模拟试验结合的方法,通过监测相似材料模拟深部煤炭开采过程中覆岩位移、应力变化情况及覆岩的断裂破坏、弯曲和移动变形的过程,对比分析了采场覆岩体的移动变形、应力场演化过程和采动应力的影响区域。试验结果表明:在深部倾斜煤层开采过程中,沿着采煤工作面形成了应力升高区、应力降低区和原岩应力区;对孤岛工作面进行开采时,新旧采空区容易因上覆岩层的垮落塌陷连通成整体,极易发生矿井动力灾害;布置孤岛工作面的巷道位置时建议考虑布置在采空区的应力降低区内,并且煤柱宽度不应大于10～12m,最佳选择为6～8m。Aiming at the safety problems of strata movement deformation caused by deep coal mining,the methods of theoretical analysis and similar material simulation experiment are used to monitor the displacement and stress conditions of overburden rock in the process of mining deep coal,to observe the fracture failure,bending and move deformation of stope overlayered strata in the process of deep mining coal in simulated mining,and to make a comparison and analysis of rock mass deformation,evolution of stress field and influence of mining stress area.The experimental results show that the area of stress increases,the area of stress reduces and the area of original rock stress is formed along the coal face in the process of deep mining coal.When making the exploitation of coal island face,the old and new mined-out areas become a whole one caused by strata movement and fall collapse,leading to mine power disasters caused easily by the fall collapse of mining strata.When decorating the position of roadway of the island,layout in the reducing stress area of the mined-out area should be considered first,and the width of coal pillar is not more than 10 m to 12 m,and the best choice is form 6 to 8 m.

关 键 词：深部开采 采动应力 相似材料模拟试验 覆岩移动 

分 类 号：TD325[矿业工程—矿井建设]