矿井胶带火灾巷道环境多参数时空演化规律
郭 军1,2,3,刘 荫1,2,3,金永飞1,2,3,郑学召1,2,3,张 泽1

(1.西安科技大学 安全科学与工程学院,陕西 西安 710054; 2.西安科技大学 西部矿井开采及灾害防治教育部重点实验室, 陕西 西安 710054; 3.西安科技大学 国家矿山应急救援(西安)研究中心,陕西 西安 710054)

矿业工程; 胶带火灾; 相似模拟试验; 时空演化规律; 温度场; 浓度场

Spatiotemporal evolution law of multiple parameters of roadway environment for rubber-belt fire in mine
GUO Jun1,2,3,LIU Yin1,2,3,JIN Yong-fei1,2,3,ZHENG Xue-zhao1,2,3,ZHANG Ze1

(1.College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China; 3.State Mine Emergency Rescue(Xi'an)Research Center,Xi'an University of Science and Technology,Xi'an 710054,China)

mineral engineering; rubber-belt fire; similar simulation experiment; spatiotemporal evolution law; temperature field; concentration field

DOI: 10.13800/j.cnki.xakjdxxb.2019.0104

备注

采用物理相似模拟实验的方法,借助自主搭建的矿井外因火灾烟气蔓延相似模拟实验平台,研究了矿井平直巷道内胶带火灾发展初期高温、CO等有毒有害气体浓度等灾害多参数的时空演化规律。通过试验模拟,确定了适宜胶带火灾发展的最佳风速,得到了最佳工况条件下,模拟巷道内温度场与有毒有害气体浓度场的分布规律。结果 表明:当风速为0.4 m/s时,胶带质量损失率最大,且热量扩散率最高,为试验的最佳风速; 火灾烟气蔓延过程中,巷道温度呈现出随着距火源距离增加而先升高后降低的趋势; 气态产物CO浓度表现出指数升高到一定阶段后逐渐趋于稳定,而CO2气体浓度则表现出线性升高的趋势。研究成果将对矿井火灾事故救援中危险区域划分,以及矿井外因火灾的蔓延扩散规律研究具有一定的指导和借鉴意义。

The spatiotemporal evolution law of multiple parameters was studied for rubber-belt fire in straight tunnel of coal mine by the method of physical similarity simulation experiment.The multiple parameters mainly include high temperature,toxic and harmful gases,such as CO and CO2.The self-built experiment platform for smoke spreading of mine external-cause fire was used in the study.The optimal air speed for the development of the rubber-belt fire is determined.At the same time,the distribution law of the temperature field and the concentration field of toxic and harmful gases in the tunnel was obtained under the optimum condition.The results show that at the air speed of 0.4 m/s,the quality loss rate of the rubber-belt and the heat diffusion rate were the highest,which was optimal air speed.In the process of smoke spreading,the temperature of tunnel shows the trend of decreasing after increasing firstly,when the distance from the ignition source is increasing.The CO gas concentration show the trend of a certain stage of gradually stabilized after exponential growth,and CO2 gas shows a trend of linear increase.This study is of guidance for the division of dangerous areas in the mine fire accident rescue,and of reference for study of the spread of mine external-cause fire.