摘要
在松软煤层中钻进瓦斯抽放孔时既要成孔又要保持较高的瓦斯渗透率是一个难题 ,采用泡沫冲洗液钻进可以兼顾二者 。
It is a dilemma that both the hole should be formed and high gas permeability should be maintained while drilling the gas drainage hole in the lum.The adoption of foam flushing liquid can solve the problem and achieve a satisfactory effect.
出处
《中国矿业》
北大核心
2003年第3期37-39,共3页
China Mining Magazine
