The Integral Structure Design And Study On Anti-explosion Performance Of Refuge Chamber

Although China is the world's first coal power, unfortunate accident caused by coal mine production is always the top of the world due to constraints of geographical conditions. in recent years, accident prevention and post disaster relief have been very significance research topics and more and more researchers pay attention to emergency actions system. Mobile refuge chamber provides a relative airtight space for stuff members to avoiding disasters, Therefore, its safety performance directly influences the survival of the jammed people, it has obviously important value in this aspect.This paper firstly focus on structure / function integration needs of mobile refuge chamber and put forward the basic steps of cabin design. Combined with the specific characteristics of the underground, this paper initially identified the cabin structure form. Using three-dimensional modeling software UG NX 8.0 conceptually designed geometry model of refuge chamber; Secondly, combined use explicit dynamics and Autodyn analysis software in ANSYS WORKBENCH,in this paper it established a fluid- solid coupling simulation platform and then combined with TNT equivalent method, gas explosion shock wave propagation process was simulated in the roadway Finally,the dynamic response of whole refuge chamber subjected overpressure loading has been simulated based on explicit dynamics program of Ansys Workbench.The refuge chamber is preliminary designed in this paper, and dynamic load is transformed to static load by calculating the dynamic load coefficient. With considering the static load as allowable pressure, the thickness of inner and outer skins and bolts have been calculated. In addition, stiffeners and front door and back door system have been designed, where stiffeners were located along the direction of 45°. Gas explosion in the roadway has been simulated in three different amount of TNT condition, that is 97.8 kg, 91.28 kg and 78.24 kg. Overpressure curves of different amount of TNT were analyzed and compared,and overpressure curves of each surface on the refuge chamber of 78.24 kg TNT is used as the load condition finally. After anti-explosion performance of refuge chamber was studied by using finite element analysis software, the distribution of stress and deformation, was obtained. According to the judgment criterion, the security of the refuge chamber can be examined. The result of simulation showed that maximum deformation of the whole refuge chamber is 18.78 mm, which is in the range of safety criterion, and indicated it has preferable rigidity. Meanwhile, most of maximum stress of the system of front door and back door, flange and outer skin, are less than the selected material yield strength. However, the stiffener exists stress concentration that may lead to occurring yield failure.Using the destruction mechanism of explosion shock wave for obstacles in the roadway as theoretical basis. The paper studied refuge chamber and its coupling effect, and analyzed overall safety performance of the refuge chamber under the impact. This result can provide reference and basis for further improvement of refuge chamber and check of key components.