高温矿井采空区煤自燃过程对工作面热环境的影响研究  

Study on the influence of coal spontaneous combustion processin goaf on thermal environment of working face in high ground temperature mine

作　　者：张正开 郭明明 丁魏 ZHANG Zhengkai;GUO Mingming;DING Wei(Wulanwulun Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Ordos,Inner Mongolia 017200,China;Jinjie Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719000,China)

机构地区：[1]国能神东煤炭集团有限责任公司乌兰木伦煤矿,内蒙古自治区鄂尔多斯市017200 [2]国能神东煤炭集团有限责任公司锦界煤矿,陕西省榆林市719000

出　　处：《中国煤炭》2024年第S01期94-100,共7页China Coal

基　　金：国家自然科学基金资助项目(51974232、51574193);陕西省基础研究计划项目(2017JM5039)。

摘　　要：采煤工作面热害是高温矿井热害最为严重的区域,而采空区煤自燃产生的高温会加剧工作面热害。通过数值模拟方法,研究了工作面动态推进下采空区煤自燃过程对工作面热环境的影响,预测了工作面不同进风温度条件下热环境改善效果。研究结果表明,在工作面正常推进速度下,采空区煤自燃过程对工作面热环境影响较小,工作面以2.4 m/d推进30 d,工作面平均温度仅上升0.3℃,回风隅角处温度升高0.6℃;当采空区发生煤自燃火灾时,工作面回风隅角温度上超过1℃;工作面进风温度为20℃时,与进风温度为27℃时相比,工作面平均温度能降低4.8℃,该研究结果可为高温矿井采煤工作面热害治理提供理论参考依据。The coal mining face is the most serious area of heat damage in high-temperature mines,and the high temperature generated by spontaneous combustion of coal in goaf will exacerbate the heat damage of working face.The influence of coal spontaneous combustion process in goaf on the thermal environment of working face under dynamic advancing of working face was studied through numerical simulation method,and the improvement effect of thermal environment under different inlet air temperature conditions of working face was predicted.The research results indicated that under normal advancing speed of the working face,the spontaneous combustion process of coal in the goaf had little impact on the thermal environment of the working face;when the working face advancing at 2.4 m/d for 30 days,the average temperature of the working face only increased by 0.3℃,and the temperature at the return air corner increased by 0.6℃;when a coal spontaneous combustion fire occurred in the goaf,the temperature at the return air corner of the working face exceeded 1℃;when the inlet air temperature of the working face was 20℃,the average temperature of the working face reduced by 4.8℃compared with the inlet air temperature of 27℃.This research result could provide theoretical reference for the treatment of heat damage in high-temperature mining working faces.

关 键 词：矿井热害 采空区 煤自燃 采煤工作面 数值模拟 

分 类 号：TD727.2[矿业工程—矿井通风与安全]