Studies On Gas Disaster Of Zipingpu Tunnel

Gas disaster is one of the major disasters during the tunnel construction., Gas disasters are the result of many factors, while the importance is different of the factors affecting the gas disaster. Along with infrastructure development, more and more tunnel of traversing the coal seam will be constructed, and the gas disasters and accidents are also constantly rising. There is an urgent need for an effective tunnel gas disaster risk assessment methods to prevent and reduce gas losses caused by disasters.This thesis takes the Du-Wen express way Zipingpu tunnel as an example. Based on the investigation of the Zipingpu tunnel geology, analysised the related data and massive paper of gas tunnel, we do a comprehensive study on the gas disaster of the tunnel. Study contents and conclusions acquired in this paper are mainly included as follows:(1) This thesis analysis the gas generation, occurrence conditions, migration law and the gas disaster, and study the factor of the gas disaster.(2) This paper explicates the geological factors on the occurrence of gas. Through analysis the geological data of the Zipingpu tunnel and study the impact of geological conditions on the gas, conclude the reasons tunnel of the high gas on the Zipingpu tunnel.(3) Based on the theory of the fuzzy mathematics, and a wealth of information of gas,we get the risk factors of the gas hazard, while we establish the model of the tunnel gas risk assessment. Fuzzy comprehensive evaluation on the results of the monitoring results were Compared the results of the actual monitoring results, we can conclude the fuzzy comprehensive evaluation method on the gas risk assessment of tunnel is reasonable and effective. Provide a theoretical basis for the gas risk assessment.(4) Through the study of gas disaster prevention measures, we establish a prevention system for the gas disaster of the tunnel.