| 大断面公路隧道穿越构造煤层瓦斯抽放技术研究 |
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| 引用本文： | 龙港,黄飞,李树清,朱云涛,戎有龙,罗太有,刘勇.大断面公路隧道穿越构造煤层瓦斯抽放技术研究[J].隧道建设,2022,42(Z1):486-492. |
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| 作者姓名： | 龙港 黄飞 李树清 朱云涛 戎有龙 罗太有 刘勇 |
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| 作者单位： | （1． 湖南科技大学资源环境与安全工程学院， 湖南 湘潭 411201；2． 湖南科技大学 南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室， 湖南 湘潭 411201；3. 河南理工大学 河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地，
河南 焦作 454003；4.
中交路桥南方工程有限公司，
北京 101149； 5. 贵阳景烁安全科技有限公司， 贵州 贵阳 550000） |
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| 摘 要： | 为有效降低隧道煤层的瓦斯含量，消除隧道揭煤施工的突出危险，以兰海国家高速公路重庆至遵义段某公路隧道为工程依托，采用超前钻探的方法准确探测煤层的赋存情况与隧道揭煤掌子面前方的局部地质构造特征；
在此基础上确定钻孔的有效抽放半径与瓦斯抽放控制范围，并对局部构造煤层抽放钻孔进行加密布置； 最后采用顶板穿层钻孔预抽煤层瓦斯技术进行瓦斯抽放，并对抽放效果和区域防突措施进行检验。结果表明：
该隧道瓦斯抽放效果良好，区域防突措施效果显著。
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| 关 键 词： | 大断面公路隧道 构造煤层 瓦斯抽放 防突措施 抽放半径 |
Gas Drainage Technology During Large Cross Section
HighwayTunnel
Crossing though Tectonic Coal Seam |
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| LONG Gang,HUANG Fei,LI Shuqing,ZHU Yuntao,RONG Youlong,LUO Taiyou,LIU Yong.Gas Drainage Technology During Large Cross Section
HighwayTunnel
Crossing though Tectonic Coal Seam[J].Tunnel Construction,2022,42(Z1):486-492. |
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| Authors: | LONG Gang HUANG Fei LI Shuqing ZHU Yuntao RONG Youlong LUO Taiyou LIU Yong |
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| Abstract: | To effectively reduce the gas concentration of the
tunnel coal seam and eliminate the gas outburst risk, a case study is conducted
on a highway tunnel in the Chongqing Zunyi section of the Lanhai
National Expressway. The advance drilling and detection method is employed to
accurately detect the coal seam′s storage condition and
the local geological structure characteristics in front of the tunnel coal
uncovering face. On this basis, the effective drilling radius and gas drainage
control range are determined, and the gas drainage boreholes of the local tectonic
coal seam are increased. Finally, the gas drainage is carried out using pre drilling in the roof, and the drainage effect and regional anti outburst measures are tested. The results show that the method
adopted reaches a good gas drainage effect and the regional gas outburst risk
is effectively reduced. |
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