关键词: 位移监测, 深部开采, 上覆岩层, 移动规律, 长壁法

Abstract: The problems in deep coal mining are increasingly more serious.In order to understand the roof strata movement law in deep mining, in combination with the real case of Panyi Mine, displacement monitoring was carried out on the roof strata by using a multipoint displacement monitor, with the monitoring holes arranged on the roof and floor of gas drainage tunnel in coal seam No.13-1.Analysis was made of the scope of the roof strata displacement, weakening and fracture at different levels and the distribution of the “three zones”.The result indicates that the strata sedimentation process can be divided into three phases: initial, active and decay.The curve of the strata sedimentation with the mining progress agrees with negative exponential function relation.Based on the sedimentation displacement and delamination, the boundary between the fissure zone and deformation belt was decided and the strata fracture site and the key strata were deduced.The research result provides a basis for a rational deep mining.

Key words: Displacement Monitoring, Deep mining, Roof strata, Movement law, Longwall mining method