厚硬基本顶短壁工作面预裂切顶技术应用研究OA

In order to solve the problem of safe and efficient mining of short wall fully mechanized mining face under the condition of thick and hard basic roof in Xinzhi Mine,the variation of roof displacement and the evolution characteristics of stope abutment pressure under the influence of primary mining were simulated and studied by FlAC3D numerical simulation software,and the mine pressure behavior law of working face under different advancing distance was compared and analyzed.The technical scheme of pre-splitting and roof cutting by two-way concentrated blasting was put forward,which was suitable for the short-wall face.Combined with the actual situation in the field and the monitoring results,it was considered that the application of the pre-splitting roof cutting technology of two-way concentrated blasting realized the weakening treatment of the hard roof,alleviated the pressure performance of the working face,and could meet the safe and efficient production of the mine.