The paper describes the determination of rational location of high-located gas drainage roadways in Laowuji Mine of Panjiang Coal & Electricity (Group)Company.

介绍了盘江煤电（集团）公司老屋基矿高位瓦斯抽放巷道合理位置确定的有关情况。

By using this method, the damage of surface gas drainage holes caused by induced excessive mining displacement can be effectively reduced if not being avoided.

采用提出的计算方法可避免由于受采动影响对地表瓦斯抽放钻孔引起的过大变形及其所造成的破坏。

To meet the requirement of small diameter and shallow hole drilling for gas drainage in coal tunnel, the ZDY1200L track-mounted hydraulic tunnel drilling rig has been developed.

为适应当前煤矿井下小直径浅孔瓦斯抽放钻进的需要，研制了ZDY1200L型履带式全液压坑道钻机。

The above stated method was successfully applied to 23 large diameter gas drainage boreholes.

采用上述方法已经成功施工23口大口径瓦斯抽排钻孔。