矿井火灾时期火源分支巷道风阻变化趋势试验研究  

Experimental study on the variation law of wind resistance in branch roadway of fire source during mine fire

作　　者：王海燕[1] 徐祚卉 徐良伟 王磊[1] 张丙森 WANG Haiyan;XU Zuohui;XU Liangwei;WANG Lei;ZHANG Bingsen(School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083

出　　处：《安全与环境学报》2023年第8期2661-2668,共8页Journal of Safety and Environment

基　　金：国家自然科学基金项目(51874313);国家重点研发计划项目(2018YFC0808101)。

摘　　要：为解决火灾时矿井巷道风阻不易获取的问题,根据热力学、流体力学和通风学理论,推导矿井火灾期间火源分支巷道风阻变化与火灾产生的CO_(2)体积分数之间的关系。结果表明,在矿井火灾时期,火源分支巷道风阻与火灾产生的CO_(2)体积分数存在线性关系。基于搭建的小尺寸矿井火灾模拟试验系统进行下行通风斜巷试验,测定火灾后巷道风阻随CO_(2)体积分数的变化。试验结果与理论式计算结果相吻合。To solve the problem that the wind resistance in the roadway is not easy to obtain during mine fire,an improved calculation method of wind resistance of fire source branch roadway during mine fire was proposed in this paper.Firstly,according to the theory of thermodynamics,fluid mechanics,and ventilation,the formula between the variation of wind resistance in fire source roadway and the volume fraction of carbon dioxide generated by fire during mine fire was theoretically deduced.The formula indicates that there exists a linear relationship between the wind resistance of the fire branch roadway and the volume fraction of carbon dioxide generated by the fire during the mine fire.To verify this formula,a small-scale mine fire simulation experiment system was designed and built.The experimental system consists of eleven roadways,one control system,one detection system,one fire source simulation system,and a tail gas treating unit.The control system includes six adjustable opening air doors and a fan.By controlling the air doors in the experimental system,a series of the branch containing the fire source roadway is constructed.The fire roadway is 5 m long,0.3 m wide,and 0.3 m high,with a dip angle of 12 degrees.The bottom,roof,and one sidewall of the roadway are made of steel,while the other sidewall is made of fireproof glasses to observe the flow of smoke.And the fire test of downhill longitudinal ventilation was carried out to determine the variation of wind resistance in the roadway with the carbon dioxide volume fraction after the fire.The experimental results show that with the increase of carbon dioxide volume fraction produced by fire,the wind resistance of the fire source roadway increases.The experimental results are consistent with the calculation results drawn from the theoretical formula.

关 键 词：安全工程 矿井火灾 火源巷道风阻 CO_(2)体积分数 试验验证 

分 类 号：X936[环境科学与工程—安全科学]