Research On Dynamic Response Of Coal Mine Refuge Chambers Subjected To Gas Explosion Load

Coal mine accident is a big problem for the development of coal industry all thetime, numerous casualties and huge property loss are brought about each year aroundthe world because of coal mine accident, which can be caused by many reasons, ofwhich gas explosion is most common. It can solve the problem in large degree to designthe coal mine mobile refuge chamber system with certain properties of anti-explosion,however, the general way to achieve the design strength is increasing the thickness ofthe elements according to the current anti-explosion design specification of refugechamber, and the design is neither economic nor reasonable. This paper improves theanti-explosion properties of refuge chamber through applying foam aluminum toexplosion door of refuge chamber.First, this paper established a numerical simulation model of gas explosion basedon the theory of gas explosion spread, simulated the communication process of gasexplosion in the large test gallery, extracted the peak pressure in different observationpoints, and compared the real tests done by predecessors to prove the correctness of theestablished model.Secondly, this paper researched the impact of chamber section size and sectiontype, chamber length on the properties of anti-explosion through simulating andanalyzing the dynamic response of four different chambers under the gas explosion load.The results showed that the section size and type of chamber had a bigger influence onthe properties of anti-explosion, while the effect of chamber length is quite small.Last, this paper creatively applied foam aluminum in the form of interlayer boardto the explosion door of chamber, and investigated the impact of foam aluminum on theproperties of anti-explosion. The results showed that foam aluminum could give fullplay to energy-absorption capability, improved the property of chamber anti-explosion,and the energy-absorption capability of foam aluminum was greatly influenced by thethickness of foam aluminum core body.