摘要
介绍了千秋煤矿21121综放工作面利用大直径水平长钻孔抽放瓦斯的技术方法和效果。比较了高位钻场岩石钻孔抽放与低位钻场高位钻孔抽放的优缺点,得出了采用高位钻场大直径水平长钻孔瓦斯抽放技术具有抽放流量大,钻孔利用率高,抽放效果稳定等优点。
The paper introduced the technical method and benefits of the gas drainage with large diameter horizontal long boreholes applied to No.21121 fully mechanized top coal caving mining face in Qianqiu Mine.The paper made a comparison of the advantages and disadvantages between the gas drainage at high level with boreholes in rock strata and the gas drainage at low level with high level boreholes.The results showed that the gas drainage technology at a high level with large diameter horizontal long boreholes wou...
出处
《煤炭科学技术》
CAS
北大核心
2007年第2期13-15,共3页
Coal Science and Technology
关键词
高位
大直径
长钻孔
瓦斯抽放技术
high location
large diameter
long borehole
gas drainage technology
