Wu Ji, Li Zongxiang, Huang Shuoran
College of Safety Science and Engineering, Liaoning Technical University, 47 Zhonghua Road, Xihe District, Fuxin City, 123000, Liaoning Province, China.
Key Laboratory of Mine Thermodynamic disasters and Control of Ministry of Education, Fuxin, 123000, China.
Sci Rep. 2024 Dec 28;14(1):31002. doi: 10.1038/s41598-024-82029-y.
Based on the engineering example of Linsheng coal mine, this paper uses TF1M3D computer simulation platform to systematically analyze the process of smoke flow spreading and air flow disorder disaster from the perspective of the whole mine network, and puts forward corresponding plans and measures. A small scale similar experiment was carried out to study the updraft flow fire in the mine. Through the analysis of the collected experimental data, the variation law of the air volume of the fire source in the main air path, side branch road and total air path with different air volume and the variation characteristics of the temperature at the monitoring point with time were obtained under different air volume conditions, and the critical air volume was fitted as 1.65 m·s. The CAD digital stereoscopic model of Linsheng mine was established, and the TF1M3D simulation platform was used to simulate the mine fire under normal ventilation condition. The preset fire source point of the conveyor belt roadway in the first west district of Linsheng coal mine was used to observe the change of air volume during the fire process.The smoke flow reversal phenomenon would occur when the fire occurred in the first west district. The reversed smoke flow will flow to the 503 face and cause contamination. In order to inhibit the reversal of smoke flow, the emergency plan is proposed to increase the number of fan rotation and set fire doors in appropriate places, which can effectively inhibit the diffusion of smoke and improve mine disaster resistance.
本文以临生煤矿工程实例为基础，利用TF1M3D计算机模拟平台，从全矿井通风网络角度系统分析烟雾流动扩散及风流紊乱灾害过程，并提出相应方案与措施。开展了小规模相似实验研究矿井上行风流火灾。通过对采集的实验数据进行分析，得出了不同风量条件下主风路、旁侧支路及总风路中火源风量随不同风量的变化规律以及监测点温度随时间的变化特征，拟合得到临界风量为1.65米·秒。建立了临生煤矿CAD数字立体模型，利用TF1M3D模拟平台对正常通风条件下的矿井火灾进行模拟。以临生煤矿一西区胶带输送机巷道预设火源点观察火灾过程中风量变化。一西区发生火灾时会出现烟流逆转现象，逆转烟流会流向503工作面造成污染。为抑制烟流逆转，提出应急预案，增加风机运转数量并在适当位置设置防火门，可有效抑制烟雾扩散，提高矿井抗灾能力。
