夹岩水利工程瓦斯突出隧洞综合防突技术研究

Study on Comprehensive Outburst Prevention Technology of Gas Outburst Tunnel in Jiayan Water Conservancy Project

以贵州省夹岩水利枢纽及黔西北供水工程水打桥隧洞进口瓦斯突出洞段的防突治理为例,通过3个循环的试验论证和分析研究,对施工通风、钻孔及灌浆工艺、瓦斯抽排及效果检验方案等进行了改进和优化,使水打桥隧洞进口瓦斯突出洞段的瓦斯抽排技术方案趋于完善.同时通过加强现场组织管控和全过程技术咨询等措施,达到了在保证工程安全、质量的前提下加快施工进度的目的.

Taking the gas outburst prevention and control at the entrance of Shuidaqiao Tunnel of Jiayan Water Control Project and Northwest Water Supply project in Guizhou Province as an example,through three cycles of test demonstration and analysis,the construction ventilation,drilling and grouting technology,gas drainage and effect inspection scheme are improved and optimized.The technical scheme of gas drainage of Shuidaqiao tunnel entrance gas outburst tunnel tends to be perfect.At the same time,through strengthening the on-site organization and management and strengthen the whole process of technical consultation and other measures,the purpose of speeding up the construction progress under the premise of ensuring the safety and quality of the project is achieved.