Simulation analysis of mine refuge chamber performance in different loading modes

In this work, by using the ANSYS and LS-DYNA softwares, we established the three-dimensional finite element model of the refuge chamber, the gas/gas and grime and the laneway. The ultimate strength and deformation of the refuge chamber were simulated under the action of three kinds of loads, mainly including the fluid-solid interaction numerical analysis of the real gas/gas and grime explosion effect, the equivalent triangle wave explosion numerical dynamic simulation and the hydrostatic pressure load calculations. Through the above three forms of numerical simulations of loading, we determined the dynamic/static load capacities of the refuge chamber as well as the deformation rules with the given gas/gas and coal dust explosion overpressure variation. The simulation results indicate that the limit overpressure of the refuge chamber under the equivalent triangle wave explosion is bigger than the fluid-solid interaction numerical analysis results, which approaches more closely to the experimental results. If the refuge chamber can meet the demand of transformation under explosion loading, it can also satisfy the transformation requirement under hydrostatic pressure load.