关键词: 西部生态脆弱区, 村庄下压煤, 充填开采, 固废资源化, 绿色矿山

Abstract: Aiming at the problems of coal under village and solid waste emission disposall and surface subsidence control caused by high intensity mining in ecologically fragile areas of western China, a short-wall continuous mining and filling cemented filling mining technology was proposed. The technical connotation and technology of mining and filling were expounded, and the composition and strength of filling material were analyzed. The ratio of gangue ( slag ), fly ash, gypsum, cement and mine water suitable for the engineering site was determined as 74: 2: 2: 7: 15, and the slurry concentration was 85%. Under this ratio, the uniaxial compressive strength of filling body could reach about 3.1MPa. The composition of the filling system of the technology is proposed, including the gangue transportation system, mud preparation system, monitoring system and working face filling system. The engineering application shows that the filling rate of 5.25m thick coal seam can reach more than 98% by using this technology, and the maximum ground subsidence is about 180mm. It can deal with 400,000 tons of industrial solid waste, and the filling effect is good.