贫氧条件下煤自燃特性实验研究  

Self-igniting Experimental Studying of Coal under Oxygen-lean Condition

作　　者：张群[1,2,3] 李玉福[4] 姚海飞[1,2,3] 徐长富[1,2,3] 郑忠亚[1,2,3] 王海燕[1,2,3] ZHANG Qun;LI Yu-fu;YAO Hai-fei;XU Chang-fu;ZHENG Zhong-ya;WANG Hai-yan(Mine Safety Technology Branch of China Coal Research Institute, Beijing 100013, China;State Key Laboratory of Coal Resource High Effective Mining & Clean Utilization (China Coal Research Institute), Beijing 100013, China;Beijing Coal Mine Safety Engineering Technology Research Center, Beijing 100013, China;Shangwan Coal Mine, Shenhua Shendong Coal Group, Erdos 017209, China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]北京市煤矿安全工程技术研究中心,北京100013 [4]神华神东煤炭集团上湾煤矿,内蒙古鄂尔多斯017209

出　　处：《煤矿开采》2016年第6期96-100,共5页Coal Mining Technology

基　　金：国家国际科技合作专项项目(2015DFR70900);中国煤炭科工集团有限公司科技项目青年基金项目(2016QN002);煤炭科学技术研究院科技发展基金项目(2014JC06)

摘　　要：针对煤矿井下采空区等高自燃危险性区域内氧浓度通常较低的情况,选取上湾矿12号煤层煤样作为试验样品,分别开展了供氧浓度5%,8%,11%,14%,17%和21%条件下的程序升温实验,分析了CO,CO_2和C_2H_4的生成规律,测算了不同供氧浓度条件下的自燃临界温度,探讨了自燃临界氧浓度。结果表明:随着供氧浓度的降低,相同煤温条件下氧化产物的生成量减小,C_2H_4首次出现的温度延迟;根据C_2H_4首次出现温度和自燃临界温度的变化规律判断上湾矿12号煤层的临界氧浓度为8%。研究结果对采空区自燃"三带"观测时氧浓度下限判定指标的选取和井下贫氧环境中煤自燃火灾的预测预报研究具有一定的指导意义。Oxygen concentration is low in some high self-igniting dangerous area like goaf area of coal mine, it taking coal sample ofNo. 12 coal seam of Shangwan coal mine, temperature programming experiment was done under different oxygen concentration, such as5%, 8%, 11%, 14%, 17% and 21%, the formation rule of CO, CO2 and C2 H4 was analyzed, self-igniting critical temperatureunder different oxygen concentration was calculated, then self-igniting oxygen critical temperature was discussed. The results showedthat oxidation products production decreased at the same coal temperature with oxygen concentration decreased, C2 H4 appeared temperaturedelay for the first time, the critical oxygen concentration was 8% for No. 12 coal seam of Shangwan coal mine according thechange law of the first temperature and self-igniting critical temperature of C2 H4. The studying results could referenced for the oxygenconcentration lower limit index selected of goaf self igniting ‘three zones’ observation andcoal self igniting fire forecast under oxygenleanin mine.

关 键 词：贫氧 煤自燃 程序升温 临界温度 临界氧浓度 

分 类 号：TD75[矿业工程—矿井通风与安全]