Abstract Gas tunnels in non-coal measure strata are essentially different from those in coal measure strata in terms of the gas source, reservoir and release. There are many studies on the construction and gas monitoring technology for gas tunnels in coal measure strata at home and abroad, and most of the gas tunnels in non-coal measure strata are managed through the technology for gas tunnels in coal measure strata, with few specific studies. Based on the construction cases of two different types of non-coal measure strata gas tunnels, namely the Xiaojialiang Tunnel of the New Lanzhou-Chongqing Railway and the Huangcao Tunnel of the New Chongqing-Huaihua Second Line, this paper deeply analyzes the gas features of connected gas tunnels in non-coal measure strata and gas tunnels in shale gas formation , and puts forward the key gas management technology mainly based on gas forecasting and ventilation dilution and discharge, and combining manual and automatic monitoring. The field engineering practice shows that construction safety is guaranteed, the investment and construction period is controlled, and good results are achieved, which provides reference experience for the safety management and control of gas tunnels in non-coal measure strata.
Abstract：
Gas tunnels in non-coal measure strata are essentially different from those in coal measure strata in terms of the gas source, reservoir and release. There are many studies on the construction and gas monitoring technology for gas tunnels in coal measure strata at home and abroad, and most of the gas tunnels in non-coal measure strata are managed through the technology for gas tunnels in coal measure strata, with few specific studies. Based on the construction cases of two different types of non-coal measure strata gas tunnels, namely the Xiaojialiang Tunnel of the New Lanzhou-Chongqing Railway and the Huangcao Tunnel of the New Chongqing-Huaihua Second Line, this paper deeply analyzes the gas features of connected gas tunnels in non-coal measure strata and gas tunnels in shale gas formation , and puts forward the key gas management technology mainly based on gas forecasting and ventilation dilution and discharge, and combining manual and automatic monitoring. The field engineering practice shows that construction safety is guaranteed, the investment and construction period is controlled, and good results are achieved, which provides reference experience for the safety management and control of gas tunnels in non-coal measure strata.
YANG Yi
.Research on Key Technologies and Management of Gas Tunnel Construction in Non-coal Measure Strata[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(1): 249-255
2023, Vol. 60 