煤矿安全2024，Vol.55Issue(2)：55-61,7.DOI:10.13347/j.cnki.mkaq.20221872
煤与瓦斯突出冲击气流数值模拟研究
Numerical simulation study on coal and gas outburst impact airflow
左文哲 1谯永刚 1华杰 1秦鹏飞 2王海杰3
作者信息
- 1. 太原理工大学 安全与应急管理工程学院,山西 太原 030024
- 2. 山西襄垣七一新发煤业有限公司,山西 襄垣 046299
- 3. 山西黄土坡鑫运煤业有限公司,山西 长治 046500
- 折叠
摘要
Abstract
In order to reveal the propagation law of coal and gas outburst impact airflow,the distribution laws of velocity field,pres-sure field,impact force field,concentration field of impact airflow in the process of coal and gas outburst are simulated by using the high Mach flow and dense material transfer module in COMSOL software.The simulation results show that the impact airflow in the roadway is jet like,with a velocity of 378.6 m/s,and with the increase of distance,it presents a multi peak vibration attenuation trend.Periodic expansion wave zone and compression wave zone appear in the jet,and the tail of the jet zone develops into turbulence and instability,and moves disorderly in the roadway.The impact force of the protruding blast flow can be as high as 246.3 kPa,and the shock wave moves in the roadway at the local sound speed.The maximum gas diffusion distance is 133.6 m,and the gas volume fraction in the middle of the roadway is close to 100%.Due to the pressure difference in the roadway at the later stage of the outburst,the gas returns,and the high volume fraction gas is further mixed with the air in the roadway.关键词
煤与瓦斯突出/冲击气流/数值模拟/瓦斯压力/冲击波/瓦斯体积分数Key words
coal and gas outburst/impact airflow/numerical simulation/gas pressure/shock wave/gas volume fraction分类
矿业与冶金引用本文复制引用
左文哲,谯永刚,华杰,秦鹏飞,王海杰..煤与瓦斯突出冲击气流数值模拟研究[J].煤矿安全,2024,55(2):55-61,7.
