桐梓隧道多煤层地质煤与瓦斯突出风险性分析  

Risk Analysis of Coal and Gas in Multi Coal Seam Geology of Tongzi Tunnel

作　　者：喻兴洪 黄才明 宋飞 谢进涛 YU Xing-hong;HUANG Cai-ming;SONG Fei;XIE Jin-tao(Guizhou Highway Engineering Group Co.,Ltd.,Guiyang 550008,China)

机构地区：[1]贵州省公路工程集团有限公司,贵州贵阳550008

出　　处：《西部探矿工程》2024年第9期199-202,共4页West-China Exploration Engineering

基　　金：黔科合重大专项字[2018]3011复杂地质超长大跨公路隧道高效建造与智慧运维关键技术研究及示范。

摘　　要：为探明桐梓隧道穿越煤层煤与瓦斯突出风险性,布置参数井查明隧道所在区域地层、构造、煤层以及煤层气储层特征。分析结果表明:钻遇煤层7层,煤层厚度大于0.3m有4层,煤类为贫煤,C3、C6煤层为有煤尘爆炸性,煤层隧道附近瓦斯含量3.10~11.29m^(3)/t,C3、C5、C6、C7煤层瓦斯压力均大于1.0MPa,瓦斯放散初速度均大于10mmHg,C3、C5、C6、C7煤层具有煤与瓦斯突出危险性。钻探分析结果为该地区类似工程提供参考和借鉴。To investigate the risk of coal and gas outburst in the Tongzi Tunnel crossing coal seams,parameter wells were arranged to identify the geological strata,structures,coal seams,and coalbed methane reservoir characteristics in the tunnel area.The analysis results show that there are a total of 7 coal seams encountered during drilling,including 4 with a thickness greater than 0.3 m.The coal type is lean coal,and the C3 and C6 coal seams have explosive coal dust.The gas content near the coal seam tunnel is 3.10-11.29 m^(3)/t.The gas pressure of the C3,C5,C6,and C7 coal seams is all greater than 1.0 MPa,and the initial velocity of gas release is all greater than 10 mmHg.The C3,C5,C6,and C7 coal seams have a risk of coal and gas outburst.The drilling analysis results provide reference and inspiration for similar projects in the region.

关 键 词：公路隧道 煤与瓦斯 参数井 揭煤 

分 类 号：P624[天文地球—地质矿产勘探]