Structure Design And Parameter Optimization Research For New Mine Refuge Chamber Cabin

Currently emergency escape hatch was only designed in life supporting compartment asexport，which resulted in the hidden danger that miners could not get in the life supportingcompartment by impact load too large lead to seriously deformation of emergency escapedoor or water accident. Therefore，four types of new structure model were designed，whichwere emergency escape hatches were set in transition compartment as well as both sides andtop of the life supporting compartments in these models，which can reduce security hiddentrouble；the different impact loads and the materials and the geometric parameters of refugechamber cabin were numerical simulation calculated by ANSYS/LS-DYNA. Thoughcomparing the antiknock strength and the costs of these refuge chambers，the parametersoptimization recommended values was obtained，which could reduce the research anddevelopment costs of refuge chamber cabin.The main contents are as follows.(1) Research status at home and abroad and analysis method of finite element of refugechamber were analyzed，and the coal mine gas explosion accident was occurred，the gasexplosion shock wave was propagation along the roadway，the stress increases rapidly andbecause of the friction and viscous effect，the pressure wave was attenuation，but it was notpaid attenuation，thus refuge chamber cabin can be approximated considered instantaneouspulse load，according to the draft requirements that maximum peak overpressure of anti-flowfield is not less than2×0.3MPa (2.0is taken as safety coefficient)，the impact load of refugechamber is no less than0.6MPa，the pressure-time curve was established；(2) Two numerical simulation scheme were established，which met the engineeringrequirement of the coal mines by researching the finite element analysis and the realization ofthe simulation software of the refuge chamber cabin.：coal mine gas explosion accidents wasoccurred，each surface of the refuge chamber was impacted，in order to get the maximumantiknock performance of the each side of the refuge chamber，the front side and the offside and the left side and the right side of the refuge chamber was respectively loaded by using thefinite element software of LS-DYNA；the gas explosion shock wave was propagation alongthe roadways，and the impact force was acted on the each surface of refuge chamber，in orderto accurately calculate the antiknock ability of the refuge chamber，each surface of the refugechamber was loaded at the same time；(3) In order to solve the hidden danger problem that four types of refuge chamber cabinwere designed in this paper，emergency escape hatches of the type A were designed in theright side of the transition compartment and the left side of the third life supportingcompartments，emergency escape hatches of the type B were designed in the right side of thetransition compartment and the left side of the second life supporting compartments，emergency escape hatches of the type C were designed in the right side of the transitioncompartment and the left side of the first life supporting compartments，emergency escapehatches of the type D were designed in the right side of the transition compartment and theleft side of the first life supporting compartments and the top of the second life supportingcompartments；(4) Antiknock impact performance of these refuge cabins were calculated and analyzedby using the finite element software of LS-DYNA and the distributions of stress and strainwere obtained. Through comparative the antiknock performance of the refuge chamber cabinsand miners escape routes，the optimal structure of the model was made；(5) The optimized structure was calculated and analyzed under different impact loads anddifferent structural parameters. To ensure antiknock impact performance is underspecifications requires， the relational data that optimized parameters and stress anddisplacement of refuge chamber cabin under different impact loads was obtained. The resultsof this investigating can provide a certain theory basis for meet different environmentalrequirements of our coal mines.