厚煤层分层开采工作面回撤期间自然发火防治技术  

Prevention and control technology of spontaneous combustion during withdrawal of thick seam layered mining face

作　　者：刘贵文 王帅 荆雪冬 王中举 LIU Guiwen;WANG Shuai;JING Xuedong;WANG Zhongju(Rescue Brigade of Inner Mongolia Pingzhuang Coal Industry(Group)Company,Chifeng 024076,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Safety Technology,Fushun 113122,China;Fengshuigou Coal Mine,Inner Mongolia Pingzhuang Energy Resources Co.,Ltd.,Chifeng 024076,China)

机构地区：[1]内蒙古平庄煤业(集团)公司救护大队,内蒙古赤峰024076 [2]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122 [4]内蒙古平庄能源股份有限公司风水沟煤矿,内蒙古赤峰024076

出　　处：《煤矿安全》2022年第1期105-109,共5页Safety in Coal Mines

摘　　要：针对风水沟煤矿厚煤层分层开采工作面回撤期间采空区遗煤自然发火问题,通过对采空区遗煤分布、漏风规律以及气体状态分析,初步划定疑似高温隐患区域;利用运输巷密闭外钻场施工扇形探火孔,采取定人、定点、定时的"三定"原则进行气体取样分析,从而实现对采空区自然发火区域的进一步准确定位;通过采取钻孔注液态CO_(2)与黄泥浆、上下密闭端头灌浆堵漏、采空区埋管注氮与液态CO_(2)等综合防灭火技术措施,使得封闭区内O_(2)体积分数下降到5%之后,长期保持在2%以下,消除高温隐患的同时,保证了工作面的安全启封与回撤。Aiming at the problem of spontaneous combustion of residual coal in goaf during the withdrawal of thick seam layered mining face in Fengshuigou Coal Mine,the suspected high-temperature hidden danger area is preliminarily defined through the analysis of residual coal distribution,air leakage law and gas state in goaf;the fan-shaped fire detection hole is constructed in the closed external drilling field of the transportation roadway,and the“three-determination”principle of fixed person,fixed point and fixed time is adopted for gas sampling and analysis,so as to further accurately locate the natural ignition area in the goaf.After that,comprehensive fire prevention and extinguishing technical measures such as drilling injection of liquid CO_(2) and yellow mud,grouting and plugging at upper and lower closed ends,buried pipe injection of nitrogen and liquid CO_(2) in goaf were taken,so that the O_(2) volume fraction in the closed area decreased to 5%and remained below 2%for a long time,so as to eliminate the hidden danger of high temperature and ensure the safe unsealing and withdrawal of the working face.

关 键 词：厚煤层 自然发火 分层开采 防灭火措施 液态CO_(2) 

分 类 号：TD752.2[矿业工程—矿井通风与安全]