中国矿山工程

The high dust concentration during fully mechanized sublevel caving mining has become an unfavorable factor restricting the efficient and safe mining of the mine. In order to reduce the dust concentration in fully mechanized mining face, according to the geological conditions of 5108 mining, this paper analyzes the long-hole low-pressure water-filling technology, the effect of coal seam water content improvement and dust prevention after short-hole medium-pressure water-filling in working face. According to the analysis results, this paper puts forward that the water-filling technology combining long-hole low pressure and short-hole medium pressure is applied in 5108 fully mechanized sublevel caving faces. The results show that the coal seam content increases from 2.43% to 5.45%, with an increase of 124.3%. The dust concentration in the working face was reduced to 24mg/m³, which indicates remarkable dust reduction effect by water-filling.