摘要
成都至贵阳高速铁路途经三个地貌单元,工程地质问题极为突出,线路工程所经区域有害气体不良地质极发育,主要类型为气田气、煤层气两大类,分布范围广泛,受其影响全线不同区段共有117座瓦斯隧道,为铁路建设史上之最。有害气体严重威胁着铁路工程的施工及运营安全,因此研究成贵铁路不同类型有害气体的地质特征及分布规律,对有害气体的防治具有重要意义。根据对铁路沿线区域地貌单元、大地构造背景、地层特性、储气构造、有害气体类型的地质分析,结合综合勘探、气体测试等验证,总结出成贵铁路工程有害气体发育的地质特征;基本查明气田气、煤层气的分布范围及分区规律,划分了隧道瓦斯等级,可供类似工程建设借鉴。
The Chengdu-Guiyang high-speed railway goes through three geomorphic units,so its engineering geological problems are extremely prominent. In the area of the line project,harmful gas and unfavorable geology develop,mainly including the field gas and the coal-bed gas with a wide range of distribution. 117 gas tunnels in different sections are impacted,which is the most serious in the history of the railway construction. The security of construction and operation of railway engineering is seriously influenced by hazardous gas,so it is of great significance to study geological characteristics and distribution of different types of hazardous gases in Chengdu-Guiyang Railway for prevention and control of hazardous gases. Based on the geological analysis of the geomorphic unit,tectonic structure background,stratigraphic characteristics,gas-bearing structure and types of hazardous gases along the railway,geologic features of the development of hazardous gases in Chengdu-Guizhou railway project are summarized combined with comprehensive exploration,gas testing and other verification; the distribution range and zoning rule of field gas and coal-bed gas methane are basically identified; the gas level of tunnel is divided. It can be used for reference in similar projects.
出处
《科学技术与工程》
北大核心
2018年第5期309-314,共6页
Science Technology and Engineering
基金
中国中铁二院工程集团有限责任公司院控科研项目(YJJY2017003(17-18))资助
关键词
瓦斯隧道
气田气
煤层气
产储气层
地质特征
分布规律
gas tunnels
field gas
coal-bed gas
gas pay and reservoir
geological characteristics
distribution law
