Disorder Research On Qunli Mine Ventilation System During Coal And Gas Outburst Emergency Conditions

According to active wind network theory, the regulation of prominent gas migrationin mine roadway and the affection of outburst gas for the mine ventilation system arestudied in the period of coal and gas outburst catastrophe. TF1M software which isspecifically used to study ventilation system catastrophe period and developed byMATLAB is as analytical tool.TF1M has simulated Qunli mine the dynamic process ofcoal and gas outburst.The ventilation network of including the outburst gas has been described by theactive wind network, and Coal and gas outburst source has been established. Thediffusion and migration law of disaster gases in ventilation system has been researchedby the one-dimensional finite element model. The gas power of highlight the workingsunder unsteady condition has also been researched by the characteristics method. At last,Solution model for ventilation network and gas distribution under unsteady conditionhas been established. When coal and gas are outburst, the ventilation system is broadlydivided into three processes: outburst dynamic process, the natural flowing process andthe ventilation restoring process. When the gas is outburst, gas will be poured into themain ventilation roadway under the source outburst power. It results in the intakeairways gas countercurrent; the release of gas is flow and diffusion in the mine, it resultsthat the gas which is in ventilation system roadway is uneven distribution in mine andproduces natural air pressure of gas; under the natural air pressure of gas, airflowreversal which is airflow disorder phenomena is occurred. At the same time, the range ofgas affection will expand.