Studies On Risk Assessment Of New Longquan Gas Tunnel

Gas disaster is one of the major disasters during the tunnel construction. Gas disasters are in the forms of asphyxia, poisoning, combustion, explosion, and outburst of coal and gas, when gas disasters happen, they will cause serious consequences. Therefore, people realize the significance of preventing and mitigating gas disaster, and need a effective risk assessment method of gas tunnel construction and a accurate prediction of gas diffusion in the tunnel.The thesis take the new LONGQUAN mountain tunnel as the example. Based on the investigation of t new LONGQUAN mountain tunnel, analyze the related data and Massive paper of gas tunnel, we do a comprehensives study on the risk of gas tunnel construction, Study contents in this paper are mainly included as follows:(1)This thesis analyze the gas generation and gas disaster, and the factor of gas disasters.(2)This paper study the main factors of the gas disasters happen in the gas tunnel construction, set up the system of the risk assessment of gas tunnel construction, and use the risk assessment method evaluate the new LONGQUAN mountain tunnel.(3)according to the research of the migration law of the gas in the tunnel, based on the ventilation situation of new LONGQUAN mountain tunnel construction, we conclude the rule of gas diffusion in the tunnel.(4) Through the study of tunnel construction, we establish gas risk contorl measures during the gas tunnel construction.