Underground Coal Mine Waste Rock Backfilling Mining Technology And Safety

In this paper, as the research object Yangcheng mine, using theoretical analysis, experimental analysis, field research and monitoring, numerical simulation and other methods, on the Yangcheng coal gangue backfill leftover coal conducted a feasibility study.Paper to determine a reasonable filling program, through theoretical calculation and numerical simulation method, the return air in the South Wing to ensure the stability of the roadway on both ends of the filled area width Pillar was studied to determine the reasonable Lane filling Dig range; combined beam theory and the Yangcheng mine geological conditions and the actual production of refuse storage space conditions on the size of the design; According to theoretical calculations to gradually undermine the stability "column nucleus," the range of existence, the use of numerical simulation software FLAC3D filling roadway on both sides of the stress distribution after excavation and the extent studied. Through research analysis, the horizontal stress and vertical stress within the range of 22m,22m outside the stable region, the peak stress range of 5-6m. And thus concluded that the guidance necessary to develop the order of filling roadway were optimized.In the paper the process of waste filling, Lane production system layout of the study and put forward a "steady help jacking" as the main support scheme. Finally, the surrounding rock stress and deformation monitoring and numerical simulation of the plastic zone, the effect of filling the analysis.In addition, the Yangcheng coal mining waste rock backfill wells not on the technology, also adopted by Lane waste filling the development of complete sets of technology and equipment to achieve maximum efficiency in waste rock fill to improve on both sides of the overlying rock and the stability of coal pillars, ultimately corner Yangcheng coal mining and underground coal gangue backfill purposes.