双切顶留巷采空区煤自然发火“三带”分布特征研究  

Research on distribution characteristic of“three zones”of coal spontaneous combustion in goaf with double cut roof retaining roadway

作　　者：江莉娟 张俊虎 邓存宝 年军 蔡猛 吕晓波 雷昌奎 JIANG Lijuan;ZHANG Junhu;DENG Cunbao;NIAN Jun;CAI Meng;LYU Xiaobo;LEI Changkui(School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Huajin Coking Coal Co.,Ltd.,Lyuliang 033000;Shaanxi Shanli Technology Development Co.,Ltd.,Xi’an 710075,China)

机构地区：[1]太原理工大学安全与应急管理工程学院,山西太原030024 [2]华晋焦煤有限责任公司,山西吕梁033000 [3]陕西山利科技发展有限责任公司,陕西西安710075

出　　处：《煤矿安全》2023年第12期56-63,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(52204229);山西省基础研究计划青年科学研究资助项目(20210302124349);山西省高等学校科技创新资助项目(2021L054)。

摘　　要：为了研究双切顶留巷采空区煤自燃“三带”分布特征,以沙曲一矿4502工作面为工程背景,采用现场监测与数值模拟相结合的方法研究了双切顶留巷4502工作面采空区漏风规律和自然发火“三带”分布特征。结果表明:双切顶留巷采空区漏风区域主要为工作面两侧隅角及两侧留巷,风流主要由隅角漏入采空区,同时采空区与两侧留巷都有风量交换,双留巷侧存在细长的氧化带,氧化带在采空区内整体呈U型分布;双切顶成巷工作面在开采的不同时期,煤自然发火“三带”分布存在较大差异,开采初期要加强双留巷侧5 m范围和采空区中部32~65 m范围内煤自燃防控,而在开采中后期,要加强运输留巷侧2.5 m范围内、距离轨道留巷38 m以后12 m范围内和采空区中部30~80 m范围内煤自燃防控。In order to study the distribution characteristics of the“three zones”of coal spontaneous combustion in the goaf of double cut roof retained roadway,taking the working face 4502 of Shaqu No.1 Mine as the engineering background,a combination of on-site monitoring and numerical simulation was adopted to study the air leakage law and the distribution characteristics of the“three zones”of coal spontaneous combustion in the goaf of the working face 4502 with double cut roof retained roadway.The results show that the main air leakage areas in the goaf of the double cut roof retaining roadway are the corners of the working face and the retaining roadways on both sides.The air flow mainly leaks into the goaf from the corners on both sides,and there is air exchange between the goaf and the retaining roadways on both sides.There is a slender oxidation zone on the side of the double retaining roadway,and the oxidation zone is distributed in a U-shaped throughout the goaf.At different stages of mining,there are significant differences in the distribution of the“three zones”of coal spontaneous combustion in the working face with double cut roof retaining roadway.In the initial stage of mining,it is necessary to strengthen the prevention and control of coal spontaneous combus-tion within a range of 5 m on the side of the double cut roof retaining roadway and 32-65 m in the middle of the goaf.In the middle and later stages of mining,it is necessary to strengthen the prevention and control of coal spontaneous combustion within a range of 2.5 m on the side of the transportation retaining roadway,within a range of 12 m after 38 m from the track retaining roadway,and within a range of 30-80 m in the middle of the goaf.

关 键 词：双巷切顶留巷 采空区漏风 煤自燃 采空区煤自燃“三带” 数值模拟 

分 类 号：TD752.2[矿业工程—矿井通风与安全]