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| Accident Analysis of Gas Explosion in Constructing Gas Tunnel by Using FTA |
| CHEN Yuanjiang1, CHENG Gang1, XIONG Jianming2 |
| 1. School of Resources and Safety Engineering, Central South University,Changsha 410083, China;2. School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China |
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Abstract: The gas tunnel of the road traffic engineering in its construction stage faces the gas explosion risk, with very complex influencing factors. The typical tunnel gas explosions both at home and abroad are analyzed,to explore the sources of the gas explosion hazard. Through the FTA theory, an FAT model of the tunnel gas explosion is built, the minimum cut sets and the minimum path sets of accidents are computed, 380 ways leading to the gas explosion and 2 sets preventing the gas explosion are identified. The FTA important structure is computed, the faulty electromechanical and gas managements are considered as the main issues in considering the prevention of the tunnel gas explosion. Finally the countermeasures to prevent tunnel gas explosion are established. It is shown that in the prevention and control of the gas explosion, the prevention of the gas accumulation should be put in the first place, and the control of the spark origin in the second place, based on the safety construction management of the gas tunnel.
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Received: 17 May 2012
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2012, Vol. 30 
