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 s ite 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 mm, the crack length was ranging from 320-2 143 m and the sinkage of the benches was ranging from 0.4-2.4 m.The special overburden strata st ructure, low depth and thickness ratio and the activation of the geological structure caused by the mining would be the important conditions to the discontinuous deform ation caused in the west part of the minefield.The surface ground cracking and bench subsidence phenomenon were affected by the special overburden strata structure and the miming and thickness ratio and the activation of the geological structure caused by the mining would be the induction factors to cause the discontinuous deform ation of the surface ground.

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)；