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A platform for research: civil engineering, architecture and urbanism
Gas hazard evaluation for tunnel construction in coal-bearing Longtan Formation, South China
https://orcid.org/0000-0002-1289-4799
Abstract The coal-bearing Longtan Formation is widely distributed in South China. However, its gas concentration often exceeds the standard limit in tunnels, which compromises the safety of tunnel construction and operation. In this study, statistical analysis of gas-bearing tunnels in the Longtan Formation (GTLF) and coal bed methane (CBM) experiment of Longtan Formation as related to engineering information, gas content, and pressure are discussed with the regional distribution features and influencing factors of GTLF revealed. The hazards of Longtan Formation in each province to tunnels are evaluated by fuzzy synthetic evaluation approach. The findings strongly suggest that the distribution of GTLF is characterized by east–west zonation and controlled by coal-rich zones and sedimentary facies. The western region is more harmful than the eastern region because of weak tectonic movement and more developed karstification. The influencing factors mainly include coal seam conditions, sedimentary environments, tectonic evolution history, hydrogeology, geological structure, and CBM weathering zone. Longtan Formation in Guizhou and Chongqing is the most harmful to tunnels.
Gas hazard evaluation for tunnel construction in coal-bearing Longtan Formation, South China
https://orcid.org/0000-0002-1289-4799
Abstract The coal-bearing Longtan Formation is widely distributed in South China. However, its gas concentration often exceeds the standard limit in tunnels, which compromises the safety of tunnel construction and operation. In this study, statistical analysis of gas-bearing tunnels in the Longtan Formation (GTLF) and coal bed methane (CBM) experiment of Longtan Formation as related to engineering information, gas content, and pressure are discussed with the regional distribution features and influencing factors of GTLF revealed. The hazards of Longtan Formation in each province to tunnels are evaluated by fuzzy synthetic evaluation approach. The findings strongly suggest that the distribution of GTLF is characterized by east–west zonation and controlled by coal-rich zones and sedimentary facies. The western region is more harmful than the eastern region because of weak tectonic movement and more developed karstification. The influencing factors mainly include coal seam conditions, sedimentary environments, tectonic evolution history, hydrogeology, geological structure, and CBM weathering zone. Longtan Formation in Guizhou and Chongqing is the most harmful to tunnels.
Gas hazard evaluation for tunnel construction in coal-bearing Longtan Formation, South China
https://orcid.org/0000-0002-1289-4799
Abstract The coal-bearing Longtan Formation is widely distributed in South China. However, its gas concentration often exceeds the standard limit in tunnels, which compromises the safety of tunnel construction and operation. In this study, statistical analysis of gas-bearing tunnels in the Longtan Formation (GTLF) and coal bed methane (CBM) experiment of Longtan Formation as related to engineering information, gas content, and pressure are discussed with the regional distribution features and influencing factors of GTLF revealed. The hazards of Longtan Formation in each province to tunnels are evaluated by fuzzy synthetic evaluation approach. The findings strongly suggest that the distribution of GTLF is characterized by east–west zonation and controlled by coal-rich zones and sedimentary facies. The western region is more harmful than the eastern region because of weak tectonic movement and more developed karstification. The influencing factors mainly include coal seam conditions, sedimentary environments, tectonic evolution history, hydrogeology, geological structure, and CBM weathering zone. Longtan Formation in Guizhou and Chongqing is the most harmful to tunnels.
Gas hazard evaluation for tunnel construction in coal-bearing Longtan Formation, South China
Su, Peidong (author) / He, Kunchen (author) / Feng, Tao (author) / Qiu, Peng (author) / Xu, Zhengxuan (author) / Li, Yougui (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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