采煤工作面煤层注水防尘施工参数优化及应用

Optimization and application of water-filling and dustproof construction parameters of coal seam in coal mining face

综放开采时工作业粉尘浓度较高,成为制约矿井高效、安全回采的不利因素。为了降低综放工作面回采时粉尘浓度,根据5108综放开采地质条件,对回采巷道长孔低压注水工艺、工作面短孔中压注水后煤层含水率提升效果及粉尘防治效果进行分析。根据分析结果提出5108综放工作面采用长孔低压、短孔中压相结合的注水工艺,并进行现场应用。结果表明,采用长孔低压、短孔中压相结合的注水工艺后煤层含量由2.43%增加至5.45%,增加幅度达到124.3%;工作面粉尘浓度降低至24 mg/m^(3),取得显著的注水降尘效果。

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 24 mg/m^(3),which indicates remarkable dust reduction effect by water-filling.