The Research and application of Goaf Paste-like Pumping Underground Filling System

摘要

Based on the problem of the thin seam mining, large excavation of rock roadway, in Beisu Coal Mine, Gangue filling material and its mix proportion were determined, filling system were designed. The weight of the filling material is: water: coal ash: coal gangue=1:1:10; The method of combination of large and small refuse bin is taken to realize the underground transportation, fragment and restoration of gangue; All kinds of filling material are stirring to Paste-like under the function of mixer, and then filled to the goaf by the transportation of coal gangue transfer pump. This filling system is highly mechanized, convenient to be applied and operated, and highly adapts to the thin coal seam in the coal mine.