基于大采高工作面遗煤氧化特征的煤自燃危险区域分布研究  

Study on distribution of coal spontaneous combustion risk area based on oxidation characteristics of residual coal in large mining height working face

作　　者：芮国相 刘春[2] 李文龙 韦雪娥 RUI Guoxiang;LIU Chun;LI Wenlong;WEI Xue’e(Guodian Construction Investment Inner Mongolia Energy Co.,Ltd.,Ordos 017209,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;Luwa Coal Mine of Shandong Lutai Holding Group Co.,Ltd.,Jining 272350,China)

机构地区：[1]国电建投内蒙古能源有限公司,内蒙古鄂尔多斯017209 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]山东鲁泰控股集团有限公司鹿洼煤矿,山东济宁272350

出　　处：《中国矿业》2023年第9期151-158,共8页China Mining Magazine

基　　金：国家自然科学基金面上项目“松软煤层大直径机械-气力耦合造穴增透机制及技术基础”资助(编号:52074283)。

摘　　要：为掌握大采高工作面回采期间采空区煤自燃危险区域分布规律,以察哈素煤矿3煤层31317大采高工作面为研究对象,首先通过实验测试分析了大采高工作面遗煤的自然氧化特征;其次利用束管监测系统测定了31317工作面采空区两侧的自燃“三带”,并模拟了采空区全空间的自燃“三带”分布;最后对比了不同采高工作面煤自燃“三带”随风速的变化特征,揭示了大采高工作面煤自燃危险区域分布规律。研究结果表明:煤升温氧化各阶段标志气体出现的温度点随氧气浓度升高而下降,但是下降速率逐渐减小。不同采高工作面采空区氧化带范围都随巷道风速增加而增大,且采高越高,氧化带范围增大越明显。研究结果为大采高工作面采空区煤自燃防治提供理论参考。In order to master the distribution rules of coal spontaneous combustion risk area in goaf during the mining of large mining height working face,the 31317 large mining height working face of coal seam 3 in Chahasu Coal Mine is taken as the research object.Firstly,the natural oxidation characteristics of residual coal in working face with large mining height are analyzed by experimental test.Secondly,the“three zones”of spontaneous combustion on both sides of the goaf in 31317 working face are measured by the beam tube monitoring system,and the distribution of the“three zones”of spontaneous combustion in the whole space of the goaf is simulated.Finally,the variation characteristics of coal spontaneous combustion“three zones”in different mining heights working face with wind speed are compared,and the distribution rules of coal spontaneous combustion risk area in large mining height working face are revealed.The research results indicate that the temperature point of the mark gas in each stage of coal temperature oxidation decreases with the increase of oxygen concentration,but the rate of decline decreases gradually.The range of oxidation zone in goaf of different mining heights increases with the increase of tunnel wind speed,and the higher the mining height,the more obvious the range of oxidation zone increases.The research results provide theoretical reference for the prevention and control of coal spontaneous combustion of goaf in large mining height working face.

关 键 词：大采高工作面 遗煤 氧化特征 煤自燃危险区域 巷道风速 数值模拟 

分 类 号：TD752.2[矿业工程—矿井通风与安全]