Study on the performances of a protective door in coal permanent refuge havens
Abstract
An effective protective door for a underground refuge haven has anti-explosion, anti-pressure, and sealing capabilities. In this study, Wulan Coal Mine’s actual situation and the technical requirements for the protective door in the permanent coal refuge haven were analyzed, a numerical simulation analysis for the anti-explosion performace was performed, and the materials, structure, and the sizes of the protective door were confirmed. Further, two experiments on the protection and waterproof abilities of the door were conducted. The results showed that a 15-mm thick 16 manganese steel plate door can meet anti-blast and economical requirements. In addition, a manual wedge-shaped lock structure, a single-cast door wall, and a welding steel supporting structure can satisfy the airtight sealing and anti-pressure requirements. In the numerical simulation of the blast effect, it was observed that the maxnium displacement was at the center of the door, and the region of the highest stresses was around the door. The protective door could bear a 1 MPa explosion impact, and it could withstand a 1.86 MPa static pressure load with a deformation of 5.8 mm. Further, the door maintained good sealing perforemance until the hydraulic pressure exceeded 1.6MPa with a deformation of 14 mm.
References
Jian, C.G. (2003). Research on methane explosion propagation character in duct and factors. China University of Mining and Technology.
Li, R.S. (1989). Mine refuge chamber. Yunnan Metal, Volume 1, pp. 47-50
Liao, L.Y., Ding G.Q. (2009). Blast - resistant simulation analysis of protective metal crust under impact load. Computer Simulation, Volume 8, No. 1, pp. 20-26
Lin, B.Q., Ye, Q., Zhai, C., Jian, C.G. (2008). The propagation rule of methane explosion in bifurcation duct. Journal of China Coal Society, Volume 33, No. 2, pp. 136-139
Lu X.Z., Jian, J.J. (2003). Safety assessment of blast - resistant doors using dynamic finite element method and contact analysis. Mechanics Engineering, Volume 2, pp. 24-26
Luo, Z.M., Deng, J.W., Wen, H., Zhang, H. (2007). Experimental study on flame propagation characteristics of gas explosion in small-scale duct. China Safety Science Journal, Volume 17, No. 5, pp. 106 -109
Michael, A. (2007). Parametric design of a coal mine refuge chamber. West Virginia University.
Rick, B., Graham, B. (1999). Criteria for the design of emergency refuge stations for an underground metal mine. Journal of the Aus IMM, Volume 12, pp. 2-5
Silvestrini, M., Genova, B., Parisi, G, Trujillo, F.J.L. (2008). Flame acceleration and DDT run-up distance for smooth and obstacles filled tubes. Journal of Loss Prevention in the Process Industries, Volume 21, No. 5, pp. 555-562
Sun, J.P. (2011). Research on emergency refuge system in underground mine. Coal Science and Technology, Volume 39, No. 1, pp. 69 -71
Tan, D.W., Chen, S.H., Liu, W.H. (1997). Application of finite element analysis in dynamics of explosion. Explosion and Shock Waves, Volume 4, PP. 40-46
Tian, R. (1997). The development and application of the gasproof concrete and JCL interface adhesive in gas tunnel construction. Journal of Shijiazhuang Railway Institute, Volume 9, pp. 64-68
Wang, B.J., Ji, F. (2012). Coal industry chain the endogenous of the inside nodes’ collaboration and inter-chain evolution. Journal of China University of Mining and Technology, Volume 11, No. 6, pp. 978-983
Yang, D.M. (2010). Construction and development of emergency refuge system in underground mine. Coal Science and Technology, Volume 11, pp. 6-9
Yang, Y.L. (1996). The overpressure calculation and prevention of gas and coal dust explosion. Coal Engineer, Volume 2, pp. 32-37
Zhao, L.A., Wang T.L.(2007). The application and revelation of overseas mine safe haven. Coal mine security, Volume 8, pp. 88-91
Zhu, C.j., Lin, B.Q., Jiang B.Y., Liu, Q., Hong, Y.D., Sun, Y.M. (2013). Multiphase destructive effects of shock wave resulting from coal mine gas explosion. Journal of China University of Mining and Technology, Volume 9, No. 5, pp. 718-725
