Study on Short Wall Mining and Coal Pillar Display under Buildings in Yangzhuang Coal Mine

To coal mining problem under buildings in Yangzhuang coal mine of Huaibei mine group,and then Wangawilli short wall mining with continuous coal cutter that adopted to ' three unders' mining was introduced,some relevant parameters of continuous mining working face were determined.According theoretical calculation,the rational coal pillar width under mining width 20m,which was determined as 20~26m,the numerical simulation results of FLAC^3D showed that under fixed mining width and protecting coal pillar width condition,some indexes as horizontal deformation,curvature,incline of buildings edge all met protection requirement of coal mining 'three unders',the reasonable and adaptation of continuous short wall mining was verified,the mining method not only controlled surface subsidence effectively,but also safety of surface buildings could be maintained,so coal resource recovery could be improved furthest.