摘要:本文系统分析了工作面瓦斯涌出来源,提出了底板穿层钻孔、本煤层顺层钻孔和工作面浅孔联合抽放瓦斯技术,并对抽放效果进行了对比分析,通过现场工业性试验,取得了良好的抽采效果。 关键词:预抽 穿层钻孔 上隅角瓦斯 中图分类号:TD712.6 文献标识码:A 文章编号:1672-3791(2013)05(c)-0000-00 Research on Pre-pumping Gas Technol
In many fields of high-tech industry the ultra-t hi n wall parts are employed. In this paper the experiments were carried out to dis cuss the surface microstruc