摘要
介绍了抽放瓦斯顺煤层长钻孔试验情况。在试验中使用定向钻进技术施工了3个钻孔,有1个试验孔深度达509.03m,是目前国内最深的全煤层长钻孔,平均纯钻进时效24.4m/h。这些抽放孔的瓦斯涌出量均达到2.0～2.5m^3/min。
It is introduced that the test of long drilling hole using for discharging gas from coal seams. Executed 3 hole using directional drilling technology,one drilling hole depth is up to 509.03 m,which is the longest drilling hole in coal seams,average sheet drilling speed is up to 24.4 m/h.Discharge of all these hole is up to 2.0-2.5 m3/min.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2003年第2期61-62,共2页
Coal Geology & Exploration
