Huang Shuoran, Li Zongxiang, Li Lin, Wu Ji
College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China.
Key Laboratory of Mine Thermodynamic Disaster & Control of Ministry of Education, Huludao 125105, Liaoning, China.
ACS Omega. 2025 Jan 3;10(1):1531-1540. doi: 10.1021/acsomega.4c09346. eCollection 2025 Jan 14.
To minimize the number of casualties due to poisoning in coal mine gas explosions, the migration characteristics of harmful hot gas groups in the mine ventilation system following an explosion were analyzed. Through pipeline experiments, initial CO concentrations and residual temperatures after gas explosions were determined and used as key simulation parameters. Simulations were performed using the TF1M(3D) software based on the case of the gas explosion at the Tunlan Mine. The migration trajectory of harmful hot gas groups in the mine ventilation system following an explosion was described in detail, and the impact of the failure duration of the main ventilator (Liangzhuang ventilator) on the migration characteristics of the harmful hot gas groups was analyzed. The results indicate that the migration direction of harmful hot gas groups in the mine ventilation system reverses before and after the Liangzhuang ventilator resumes ventilation, leading to a secondary invasion of the 12,403 and 12,405 working faces. Resumption of ventilation by the Liangzhuang ventilator prior to the 900 s mark can prevent the secondary invasion of harmful hot gas groups into the 12,403 and 12,405 working faces. The critical time point for miners to evacuate in the Liangzhuang area is 850 s, while for the Shijiahe area, it is 3500 s. The concept of harmful hot gas group expulsion efficiency in the Tunlan Mine was defined, and it was found to have a strong negative correlation with the failure duration of the Liangzhuang ventilator. It was determined that normal ventilation of the Liangzhuang ventilator is the key factor in controlling the migration trajectory of the harmful hot gas groups.
为使煤矿瓦斯爆炸中毒伤亡人数降至最低，分析了爆炸后矿井通风系统中有害热气体团的迁移特性。通过管道实验，测定了瓦斯爆炸后的初始一氧化碳浓度和残余温度，并将其作为关键模拟参数。基于屯兰矿瓦斯爆炸案例，使用TF1M(3D)软件进行了模拟。详细描述了爆炸后矿井通风系统中有害热气体团的迁移轨迹，并分析了主通风机（良庄通风机）故障持续时间对有害热气体团迁移特性的影响。结果表明，良庄通风机恢复通风前后，矿井通风系统中有害热气体团的迁移方向发生反转，导致12403和12405工作面受到二次侵入。良庄通风机在900 s之前恢复通风可防止有害热气体团二次侵入12403和12405工作面。良庄地区矿工撤离的关键时间点为850 s，而石家河地区为3500 s。定义了屯兰矿有害热气体团排出效率的概念，发现其与良庄通风机故障持续时间呈强烈负相关。确定良庄通风机正常通风是控制有害热气体团迁移轨迹的关键因素。
