重复采动地表非连续变形规律与机理研究  

Study on Discontinuous Deformation Law and Mechanism of Repeated Mining Surface Ground

作　　者：郭惟嘉[1] 孙熙震[1] 穆玉娥[2] 陈绍杰[1,3] 

机构地区：[1]山东科技大学矿山灾害预防控制国家重点实验室,山东青岛266510 [2]新汶矿业集团有限责任公司翟镇煤矿,山东新泰271204 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室,湖北武汉430071

出　　处：《煤炭科学技术》2013年第2期1-4,共4页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51274132);国家自然科学基金重点资助项目(51034003);国家重点基础研究发展计划(973计划)资助项目(2011CB411906)

摘　　要：为获得地质构造发育区域在重复采动情况下地表非连续变形规律,采用现场观测、理论分析等手段对翟镇煤矿重复采动条件下地表非连续变形现象进行了研究。结果表明:翟镇煤矿地表非连续变形主要集中在矿井西部,沿地质构造发育并与工作面成一定角度,地表斑裂深度不大,裂缝宽度为300～600 mm,长度为320～2 143 m,台阶下沉量0.4～2.4 m;特殊的覆岩结构、较小的采深采高比、采动引起的地质构造活化是井田西部产生地表非连续变形的重要条件;地表斑裂及台阶下沉现象受特殊覆岩结构、采深采高比影响,采动引起地质构造活化是地表非连续变形产生的诱导因素。In order to have the discontinuous deformation law of the surface ground in the geological development area under the repeated mining conditions, the site observation, theoretical analysis and other means were applied to the study on the discontinuous deformation phenomenon of the surface ground under the repeated mining conditions above Zhaizhen Mine.The results showed that the discontinuous deformation of the surface ground above Zhaizhen Mine was mainly concentrated in the west part of the minefield. Along the geological structure development and the coal mining face in a certain angle,the crack depth was not deep,the crack width was ranging from 300- 600 ram,the crack length was ranging from 320-2 143 m and the sinkage of the benches was ranging from 0.4-2.4 re.The special over- burden strata structure,low depth and thickness ratio and the activation of the geological structure caused by the mining would be the im- portant conditions to the discontinuous deformation caused in the west part of the minefield.The surface ground cracking and bench subsid- ence phenomenon were affected by the special overburden strata structure and the miming and thickness ratio and the activation of the geo- logical structure caused by the mining would be the induction factors to cause the discontinuous deformation of the surface ground.

关 键 词：重复采动 台阶下沉 地表斑裂 地表非连续变形 

分 类 号：TD325[矿业工程—矿井建设]