矿用胶带火灾危险性评价研究
Fire risk assessment of mine belt
王振兴 1周廷斌 2王伟峰 2康付如 2任晓伟1
作者信息
- 1. 陕西陕煤曹家滩矿业有限公司,陕西 榆林 719000
- 2. 西安科技大学 安全科学与工程学院,陕西 西安 710054;陕西省煤火灾害防治重点实验室,陕西 西安 710054
- 折叠
摘要
为解决目前矿用胶带火灾危险性评价中存在的主观分析和单一指标问题,提出了一种基于熵权法结合灰色关联度法的矿用胶带火灾危险性综合评价方法.利用NBS烟密度测试箱、锥形量热仪分析矿用胶带火灾烟气的光透过率、燃烧热释放速率、生烟速率和CO生成速率等火灾危险性关键影响因素,并建立矿用胶带火灾危险性多层次评价指标体系,综合评价不同热辐射条件下矿用胶带的火灾危险性.结果表明:在 50 kW/m2 的热辐射强度下,测试箱内的光透过率迅速下降,在70 s时降为0;与热辐射强度25 kW/m2 时相比,35 kW/m2 下的热释放速率峰值和总热释放量分别增加了29.06%和36.22%,生烟速率峰值和总烟产量分别增加了45.55%和31.54%,到达生烟速率峰值的时间缩短了92.59%;矿用胶带火灾危险性因素的权重排序为:燃烧危险(0.5216)>生烟危险(0.2522)>毒性气体危险(0.2261).
Abstract
In order to solve the problem of subjective analysis and single index in the fire risk assessment of mine belt,we proposed a comprehensive evaluation method of mine belt fire risk based on entropy weight method and grey correlation degree method.We analyzed the key influencing factors of fire risk such as light transmittance,heat release rate,smoke generation rate and CO generation rate of mine belt fire smoke using NBS smoke density test box and cone calorimeter,established a multi-level evaluation index system of mine belt fire risk;and evaluated the fire risk of mine belt under different thermal radiation conditions.The results showed that,under the thermal radiation intensity of 50 kW/m2,the light transmittance in the test chamber decreases rapidly,and decreases to 0 at 70 s.Compared with the heat radiation intensity of 25 kW/m2,the peak heat release rate and total heat release at 35 kW/m2 was 29.06%and 36.22%higher,respectively.the peak smoke production rate and total smoke production was 45.55%and 31.54%higher,respectively;and the time to reach the peak smoke production rate was 92.59%less.The weight ranking of fire risk factors of mine belt is:combustion risk(0.5216)>smoke risk(0.2522)>toxic gas risk(0.2261).
关键词
矿用胶带/火灾危险性/锥形量热仪/熵权法/灰色关联度法Key words
mine belt/fire risk/cone calorimeter/entropy weight method/grey correlation method引用本文复制引用
基金项目
国家自然科学基金(52074215)
贵州省科技计划(黔科合支撑[2022]一般011)
陕西省重点研发计划(2023-YBGY-479)
出版年
2024
NETL
NSTL
万方数据