关键词: 三下采煤, 连采连充, 充填工艺, 膏体充填, 充填系统

Abstract: Aiming at the problem of coal mining under the industrial square of Chazhuang Coal Mine, the continuous mining and paste filling technology are designed, the parameters of key equipment involved in mortar production and gangue crushing treatment are given, which realize green filling on the basis of ensuring the paste quality. The filling industrial pump is used to pump the paste, and the upper port of the filling roadway is sealed with a jet to ensure the top connection rate. During mining impact analysis, it was found that after paste filling, the maximum roof separation was 20.5mm, the maximum surface subsidence was 27mm, and the ground buildings are within the Class I damage level of the building , which proved the feasibility of the scheme and effectively solved problem of the coal mining under the buildings of the mine.