Drivage Roadway Damage Rule Of Gas Explosion Propagation Dynamics And Numerical Study

For the coal mine roadway cross section to study the changes in gas explosionwave propagation law, is advantageous to the prevention and inhibition of gasexplosion accidents, to determine the explosion disaster relief decision-making anddisaster prevention and mitigation work is of great significance. In this paper, on thebasis of the theory of mechanics of explosion, gas dynamics of roadway in coal minegas explosion wave propagation law of theory analysis and research. On the basis oftheoretical analysis, numerical simulation results and comparison of previousexperimental results, the physical and mathematical model of numerical simulation isdetermined. Finally, the roadway cross section roadway section diffuser and abruptlynarrowed, divergent with sudden enlargement, straight roadway explosive source insingle and double explosive source and straight roadway in unilateral and bilateralobstacles four kind of situations are simulated, and then simulates the engineeringexamples, the explosion wave propagation rule of numerical analysis. Numericalsimulation results show that the gas explosion wave change in cross section ofroadway in the propagation law of roadway, there are different from general flat andwith different cross-sectional area of variations, explosion wave propagation lawchanged also.In this paper, according to the results of numerical simulation result has a certaincontribution to the analysis of explosion propagation law, combine the results oftheoretical analysis, experiment and numerical simulation, is of great significance todevelop reasonable prevention strategies.