Abstract:
In order to obtain surface subsidence rule and control effect of short-wall stowing mining with high-water material,applying surface subsidence data,surface movement and deformation rule and major influence factors was analyzed,and surface subsidence control effect was evaluated.Results showed that short-wall mechanized stowing mining changed once subsidence of conventional mining into staged slow subsidence.The method was applied in mining 2.5m thick and sub-horizontal coal-seam with 230m buried depth,maximum surface subsidence value and subsidence speed was respectively 180mm and 2.4m/d,which was reduced 92% and 96.3% compared with full-mechanized mining method,and subsidence basin range obviously reduced,surface movement and deformation value was controlled within I-grade range of Regulation of Mining under Buildings,Railways and Water-body,which met protection requirement of ordinary buildings.