| Citation: |
LU Wei，YE Wengang，LI Jinliang，et al. Research on advanced fire warning technology utilizing thermo-sensitive material modified conveyor belts[J]. Coal Science and Technology，2025，53（1）：170−182. DOI: 10.12438/cst.2023-1733
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In the process of coal mine transport belt fire, CO and smoke are mainly produced, and CO as the indicator gas is susceptible to interference. When smoke is produced, it indicates that the conveyor belt has reached a high temperature, which risks missing the optimal time for extinguishing fires and ensuring personnel safety. To address this issue, an innovative method is proposed to modify the cover layer of conveyor belt using the thermo-sensitive material. This physical modification involves implanting the thermo-sensitive material to the belt. To evaluate the effectiveness of this modification, tests are conducted using a temperature-programmed oxidation furnace, a comprehensive thermogravimetric analyzer and the conveyor belt roller friction testing device to measure the changes in initial temperature, gas production rate, and volume fraction of indicator gases before and after the modification. Experimental results demonstrate that the physical modification with the thermo-sensitive material has minimal impact on the structural strength of the conveyor belt, and does not increase the risk of fire occurrence or spread. The unmodified transport belt produces CO as an early indicator gas at around 110 ℃, but its volume fraction and release rate are low, making it susceptible to misjudgment due to the presence of CO from other sources in the mine. The modified transport belt, on the other hand, detects the decomposition of the thermo-sensitive material in the belt's cover layer, generating the indicator gas that do not naturally occur in the mine at temperatures of 70−80 ℃. Compared to the unmodified belt, the modified belt enables earlier detection of the initial indicator gas by about 30 ℃, with a higher release rate and volume fraction, making monitoring easier. Moreover, the feasibility of the physical modification method is further substantiated from the perspective of practical engineering application. The indicator gas produced by the decomposition of the thermo-sensitive material is not affected by gases generated through oxidation of other materials in the mine, ensuring timely and accurate monitoring and warning of potential fires in the conveyor belt.
| [1] |
BAO H M,ZHANG R X. Study on optimization of coal truck flow in open-pit mine[J]. Advances in Civil Engineering,2020,2020(1):8848140. doi: 10.1155/2020/8848140
|
| [2] |
ZHANG D,LIU M X,WEN H,et al. Use of coupled TG-FTIR and Py-GC/MS to study combustion characteristics of conveyor belts in coal mines[J]. Journal of Thermal Analysis and Calorimetry,2023,148(11):4779−4789. doi: 10.1007/s10973-022-11899-z
|
| [3] |
郭军,刘荫,金永飞,等. 矿井胶带火灾巷道环境多参数时空演化规律[J]. 西安科技大学学报,2019,39(1):21−27.
GUO Jun,LIU Yin,JIN Yongfei,et al. Spatiotemporal evolution law of multiple parameters of roadway environment for rubber-belt fire in mine[J]. Journal of Xi’an University of Science and Technology,2019,39(1):21−27.
|
| [4] |
岳宁芳,蔡国斌,高文静,等. 矿井胶带蔓延火灾的细水雾抑制影响因素研究[J]. 中国安全生产科学技术,2022,18(4):92−97.
YUE Ningfang,CAI Guobin,GAO Wenjing,et al. Research on influencing factors of water mist suppression for belt spreading fire in mine[J]. Journal of Safety Science and Technology,2022,18(4):92−97.
|
| [5] |
张铎,刘茂霞,呼少平,等. 煤矿运输胶带热解动力学参数研究[J]. 矿业安全与环保,2023,50(2):52−58.
ZHANG Duo,LIU Maoxia,HU Shaoping,et al. Study on pyrolysis kinetic parameters of coal mine transport belt[J]. Mining Safety & Environmental Protection,2023,50(2):52−58.
|
| [6] |
YUAN L M,SMITH A C. Numerical modeling of water spray suppression of conveyor belt fires in a large-scale tunnel[J]. Process Safety and Environmental Protection,2015,95:93−101. doi: 10.1016/j.psep.2015.02.018
|
| [7] |
LITTON C D,PERERA I E,HARTEIS S P,et al. Some relevant parameters for assessing fire hazards of combustible mine materials using laboratory scale experiments[J]. Fuel,2018,218:306−315. doi: 10.1016/j.fuel.2017.12.106
|
| [8] |
LI L,SI J H,LI Z X. Characteristics of the spatial and temporal evolution of the environmental parameters for belt fire in underground coal mine roadway[J]. Case Studies in Thermal Engineering,2023,49:103346. doi: 10.1016/j.csite.2023.103346
|
| [9] |
蒋时才. 矿用运输胶带摩擦升温及其火灾气体发生规律的研究[J]. 煤矿安全,1990,21(6):12−18.
JIANG Shicai. Study on the friction heating of mining transport tapes and its fire gas generation pattern[J]. Safety in Coal Mines,1990,21(6):12−18.
|
| [10] |
羽田博宪,章远荣,朱林. 井下燃烧物的燃烧气体研究[J]. 煤矿安全,1991,22(3):53−61,28.
HANEDA H,ZHANG Yuanrong,ZHU Lin. Research on com-bustion gas of underground combustor[J]. Safety in Coal Mines,1991,22(3):53−61,28.
|
| [11] |
傅培舫. 实际巷道火灾过程热物理参数变化规律与计算机仿真的研究[D]. 徐州:中国矿业大学,2002.
FU Peifang. Study on variation law of thermophysical parameters and computer simulation in actual roadway fire process[D]. Xuzhou:China University of Mining and Technology,2002.
|
| [12] |
黄刚. 煤矿井下胶带火灾烟气流动及分布规律研究[D]. 廊坊:华北科技学院,2018.
HUANG Gang. Research on smoke flow and distribution of conveyor belt fire in coal mine[D]. Langfang:North China Institute of Science and Technology,2018.
|
| [13] |
初昊. 煤矿胶带热解产物生成规律分析[J]. 煤矿现代化,2023,32(5):91−94,90. doi: 10.3969/j.issn.1009-0797.2023.05.021
CHU Hao. Analysis of the pyrolysis product generation law of coal mine belt[J]. Coal Mine Modernization,2023,32(5):91−94,90. doi: 10.3969/j.issn.1009-0797.2023.05.021
|
| [14] |
王伟. 煤矿输送带热解及燃烧特性研究[D]. 北京:煤炭科学研究总院,2023.
WANG Wei. Pyrolysis and combustion characteristics of coal mine conveyor belt[D]. Beijing:Chinese Institute of Coal Science,2023.
|
| [15] |
王春华,丁仁政,李贵轩,等. 截齿截割煤体变形破坏过程的红外热像研究[J]. 岩土力学,2007,28(3):449−454. doi: 10.3969/j.issn.1000-7598.2007.03.004
WANG Chunhua,DING Renzheng,LI Guixuan,et al. Research on infrared hot image in deformation and destruction course under pick cutting[J]. Rock and Soil Mechanics,2007,28(3):449−454. doi: 10.3969/j.issn.1000-7598.2007.03.004
|
| [16] |
杨广文,艾兴. 大雁二矿250综采工作面CO来源的分析及治理[J]. 煤矿安全,2003,34(10):41−43. doi: 10.3969/j.issn.1003-496X.2003.10.017
YANG Guangwen,AI Xing. Analysis and control for CO source of fully-mechanized winning coal faces in No. 2 Dayan coal mine[J]. Safety in Coal Mines,2003,34(10):41−43. doi: 10.3969/j.issn.1003-496X.2003.10.017
|
| [17] |
WANG X H,CHEN Q P,ZHOU T N,et al. In-depth analysis of burning process of binary blended fuel pool fires based on liquid–vapor equilibria[J]. Fuel,2019,256:115918. doi: 10.1016/j.fuel.2019.115918
|
| [18] |
DING Y M,ZHANG W L,ZHANG X T,et al. Pyrolysis and combustion behavior study of PMMA waste from micro-scale to bench-scale experiments[J]. Fuel,2022,319:123717. doi: 10.1016/j.fuel.2022.123717
|
| [19] |
CHEN Y G,HE H Z,LIU Z Q. Numerical modeling of flexible polyurethane foam combustion under two ignition modes[J]. Fuel,2022,309:122204. doi: 10.1016/j.fuel.2021.122204
|
| [20] |
秦波涛,仲晓星,王德明,等. 煤自燃过程特性及防治技术研究进展[J]. 煤炭科学技术,2021,49(1):66−99.
QIN Botao,ZHONG Xiaoxing,WANG Deming,et al. Research progress of coal spontaneous combustion process characteristics and prevention technology[J]. Coal Science and Technology,2021,49(1):66−99.
|
| [21] |
ZHAO J W,WANG W C,FU P,et al. Evaluation of the spontaneous combustion of soaked coal based on a temperature-programmed test system and in situ FTIR[J]. Fuel,2021,294:120583. doi: 10.1016/j.fuel.2021.120583
|
| [22] |
CHEN J C,LI L,JIANG D Y,et al. Experimental study on the spatial and temporal variations of temperature and indicator gases during coal spontaneous combustion[J]. Energy Exploration & Exploitation,2021,39(1):354−366.
|
| [23] |
张嬿妮,舒盼,刘春辉,等. 乙二胺四乙酸微胶囊阻化煤自燃性能研究[J]. 煤炭科学技术,2022,50(8):108−117.
ZHANG Yanni,SHU Pan,LIU Chunhui,et al. Study on inhibition of coal spontaneous combustion by ethylenedia mine tetraacetic acid microcapsule[J]. Coal Science and Technology,2022,50(8):108−117.
|
| [24] |
张玉涛,杨杰,李亚清,等. 煤自燃特征温度与微观结构变化及关联性分析[J]. 煤炭科学技术,2023,51(4):80−87.
ZHANG Yutao,YANG Jie,LI Yaqing,et al. Correlation analysis between characteristic temperature and microstructure of coal spontaneous combustion[J]. Coal Science and Technology,2023,51(4):80−87.
|
| [25] |
王小令,王绍清,陈昊,等. 不同镜惰比低阶煤燃烧特性及动力学分析[J]. 煤炭科学技术,2023,51(9):302−309. doi: 10.12438/cst.2021-1477
WANG Xiaoling,WANG Shaoqing,CHEN Hao,et al. The combustion characteristics and kinetic analysis of low-rank coals with different vitrinite/inertinite ratio[J]. Coal Science and Technology,2023,51(9):302−309. doi: 10.12438/cst.2021-1477
|
| [26] |
肖旸,王振平,马砺,等. 煤自燃指标气体与特征温度的对应关系研究[J]. 煤炭科学技术,2008,36(6):47−51.
XIAO Yang,WANG Zhenping,MA Li,et al. Research on correspondence relationship between coal spontaneous combustion index gas and feature temperature[J]. Coal Science and Technology,2008,36(6):47−51.
|
| [27] |
陆浩,赵亚东,方中喜. 基于变氧条件的补连塔煤矿褐煤自燃发火规律研究[J]. 煤炭科学技术,2021,49(S2):152−158.
LU Hao,ZHAO Yadong,FANG Zhongxi. Study on spontaneous ignition of lignite in Bulianta Coal Mine based on various oxygen content[J]. Coal Science and Technology,2021,49(S2):152−158.
|
| [28] |
LU H,LI J L,LU W,et al. Variation laws of CO2/CO and influence of key active groups on it during low-temperature oxidation of coal[J]. Fuel,2023,339:127415. doi: 10.1016/j.fuel.2023.127415
|
| [29] |
梁运涛. 煤炭自然发火预测预报的气体指标法[J]. 煤炭科学技术,2008,36(6):5−8.
LIANG Yuntao. Gas index method to predict coal spontaneous combustion[J]. Coal Science and Technology,2008,36(6):5−8.
|
| [30] |
LI J L,LU W,KONG B,et al. Mechanism of gas generation during low-temperature oxidation of coal and model compounds[J]. Energy & Fuels,2019,33(2):1527−1539.
|
| [31] |
MIAO G D,LI Z H,YANG J J,et al. Microstructure evolution and higher-molecular-weight gas emission during the low temperature oxidation of coal[J]. Energy,2023,282:128424. doi: 10.1016/j.energy.2023.128424
|
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