葫芦素煤矿2^(-1)煤层自燃指标体系分析  

Spontaneous combustion index system of 2^(-1)coal seam in Hulusu Coal Mine

作　　者：郝英豪 宋强 李民 薛景辉 张铎 张伟 HAO Yinghao;SONG Qiang;LI Min;XUE Jinghui;ZHANG Duo;ZHANG Wei(Zhongtian Hechuang Energy Co.,Ltd.,Ordos 017010,China;College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Yusheng Kerui Security Technology Co.,Ltd.,Yulin 719000,China)

机构地区：[1]中天合创能源有限责任公司,内蒙古鄂尔多斯017010 [2]西安科技大学安全科学与工程学院,陕西西安710054 [3]陕西宇晟科瑞安全技术有限公司,陕西榆林719000

出　　处：《陕西煤炭》2024年第11期26-29,43,共5页Shaanxi Coal

基　　金：国家自然科学基金项目(52274229);国家自然科学基金项目(51974236);榆林高新区科技计划重点研发项目(ZD-2021-13);陕西省自然科学基础研究计划(2021JC-48);陕西省教育厅青年创新团队建设科研计划(21JP078)。

摘　　要：为了研究葫芦素煤矿2^(-1)煤层煤自燃指标体系,利用煤自然发火标志气体指标实验开展了葫芦素煤矿21404工作面采空区不同氧浓度煤自然发火标志性气体及临界值研究,并分析了煤样自燃过程中气体产生规律及煤样的升温规律。研究结果表明,煤体温超过70~80℃,煤体CO产生速率、氧化放热强度、耗氧速度和升温速度均增加,故分析葫芦素煤矿2^(-1)煤层临界温度为70~80℃;当煤温超过100~110℃时,耗氧速度以及CO、CO_(2)、CH_(4)等气体的产生率均急剧增加,故推断2^(-1)煤干裂温度为100~110℃;确定了煤自然发火预警体系的指标气体,包括CO、C_(2)H_(4)、C_(2)H_(2)。根据CO、C_(2)H_(4)、C_(2)H_(2)等煤自然发火指标的生成规律,确定了葫芦素煤矿2^(-1)煤层自然发火标志性气体及临界值,临界值为CO<30×10^(-6)、CO≥30×10^(-6)~80×10^(-6)、C_(2)H_(4)>0、C_(2)H_(2)>0。研究结果对葫芦素煤矿2^(-1)煤层煤自燃火灾预警和防治都有重要的指导意义。In order to study the 2^(-1)coal seam’s spontaneous combustion index system in Hulusu coal mine,the natural ignition signature gas and critical value of coal in the goaf of different oxygen concentration on the 21404 working face of Hulusu coal mine are investigated,and the law of gas production and the heating law of the coal sample are analyzed;The results show that when the coal temperature exceeds 70~80℃,CO production rate,oxygen consumption speed and heating rate are accelerated,Therefore,it is concluded that the critical temperature of 2^(-1)coal is 70~80℃;When the coal temperature exceeds 100~110℃,oxygen consumption speed,and gas production rates,such as CO and CH_(4),are increased drastically.Therefore,it is concluded that the dry crack temperature of 2^(-1)coal is 100~110℃;We determine the index gases of the coal natural fire early warning system,including CO,C_(2)H_(4)and C 2H 2.According to the generating rules of CO,C_(2)H_(4),C_(2)H_(2),the signature gas and critical value of natural ignition in 2^(-1)coal seam are CO<30×10^(-6),CO≥30×10^(-6)~80×10^(-6),C_(2)H_(4)>0 and C_(2)H_(2)>0.The results have guiding significance for the early warning and prevention of 2^(-1)coal seam fire in Hulusu coal mine.

关 键 词：煤自燃 氧浓度 标志性气体 临界值 

分 类 号：TD752[矿业工程—矿井通风与安全]