摘要
为优化9-301工作面的回采作业环境,通过具体分析煤层注水降尘机理,得出煤层注水后通过润湿煤体内的原生煤尘、水包裹煤体的细小部分、改变煤体物理力学性质及附带降尘四个方面实现降尘,基于煤层注水降尘机理,具体进行工作面注水降尘方案设计,确定注水钻孔布置形式、注水压力及注水结束标准等参数,并在注水方案实施前后进行工作面各区域粉尘浓度监测,以验证煤层注水降尘效果。结果表明:工作面采用脉冲注水技术后,在工作面的各个区域全尘的降尘率均在35%以上,呼尘的降尘率均在40%以上,降尘效果显著,优化了回采作业环境。
In order to optimize the working environment of 9-301 working face,through specific analysis of coal seam water injection and dust reduction mechanism,it is concluded that after coal seam water injection,the primary coal dust in the coal body can be wetted,the water envelops the small part of the coal body,and the physical and mechanical properties of the coal body are changed.Dust reduction is achieved in four aspects with dust reduction.Based on the coal seam water injection and dust reduction mechanism,the concrete water injection and dust reduction scheme design of the working face is carried out,and the water injection drilling arrangement form,water injection pressure and water injection end standard are determined,and the various areas of the working face are carried out before and after the water injection scheme is implemented.Dust concentration monitoring to verify the dust reduction effect of coal seam water injection.The results show that after adopting the pulse water injection technology on the working face,the dust reduction rate of all dust in each area of the working face is above 35%,and the dust reduction rate of expiration is above 40%,the dust reduction effect is significant,and the mining operation environment is optimized.
作者
贾文杰
JIA Wenjie(Pangpangta Colliery,Lvlin Energy Chemistry Co.,Ltd.Of Huozhou Coal Electricity Group,Linxian 033200,China)
出处
《煤矿现代化》
2021年第4期59-61,共3页
Coal Mine Modernization
关键词
回采工作面
高压注水
全尘浓度
注水压力
Working face
high pressure water injection
total dust concentration
water injection pressure
