目前国内地铁工程采用盾构法在瓦斯地层中施工经验较少，且无相关规范参考。在论述高瓦斯隧道施工控制原理及工艺流程的基础上，从前期准备、瓦斯压力段分区及涌出量计算、关键系统设计等方面展开分析与论述。为了适应高瓦斯隧道工程施工需求，进行瓦斯监控系统、通风系统及盾构局部改造与设计；同时，从隧道内渣土运输、渣土改良、盾尾密封及盾构掘进参数控制等方面，对高瓦斯隧道掘进过程关键控制技术进行全面研究。工程实践证明，通过应用瓦斯监控系统及其施工控制关键技术，实现了对土压盾构掘进过程中隧道内瓦斯量的有效控制，达到了预期目标。

The shield tunneling in ground with high gas concentration of Metro projects is not common in China currently. The preparation, sectioning of gas, gas gushing volume and key system design of shield tunnel with high gas concentration are analyzed and discussed based on construction control technology. The gas monitoring system, ventilation system and local rehabilitation and redesign of shield are carried out. Meanwhile, the key construction control technologies, i.e. mucking, ground conditioning, shield tail sealing and shield boring parameter control, are studied. The construction practice shows that the gas volume can be controlled by using abovementioned technologies.