摘要
为了解决掘进面突出煤层降尘难的问题,笔者采用现场试验和科学分析相结合的方法,在某煤矿综掘工作面进行了试验研究。首先测定突出煤层煤体的湿润半径,其次在突出煤层中设计了若干深20 m、直径75 mm的注水钻孔,注水压力为3.5~4.5 MPa,持续时间为2 h,然后取芯进行湿润效果检验。研究结果表明,在掘进进尺8.0 m处,注水降尘效果最佳,与注水前相比,注水后呼吸性粉尘有所下降,作业环境明显改善。
In order to solve the problem of difficulty in dust reduction of the coal seam in the heading face, the author carried out experimental research on a comprehensive mining face in a coal mine by using a combination of field tests and scientific analysis. First, the wetting radius of the coal seam of the outburst coal seam was measured, secondly,several water injection boreholes with a depth of 20 m and a diameter of 75 mm were designed in the outburst coal seam, the injection pressure was 3.5~4.5 MPa and the duration was 2 h, then the coring was tested for wetting effect.The research results show that the effect of water injection and dust reduction is the best at the 8.0 m advancing distance, compared with before water injection, the respirable dust decreases after water injection, and the working environment is significantly improved.
作者
张鹏
ZHANG Peng(China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400039)
出处
《河南科技》
2020年第8期86-87,共2页
Henan Science and Technology
关键词
掘进工作面
注水降尘
润湿效果
呼吸性粉尘
粉尘浓度
driving face
water injection dust reduction
wetting effect
respiratory dust
dust concentration
