摘要
以察哈素煤矿31319工作面为背景,采用理论分析、数值模拟和现场实测,对浅埋深近距离煤层群大采高工作面采空区防灭火技术进行研究,研究结果表明:遗煤氧化过程中,氧气浓度呈现从高浓度向低浓度扩散的规律;为了有效地惰化采空区,应将注氮位置选择在漏风较小及氧气浓度较低的区域;在工作面生产过程中,与工作面距离越远,采空区内氧气浓度整体呈现降低趋势,当在31319工作面进风顺槽260 m位置注氮时,注氮后测点氧气浓度出现大幅度下降,氧化带宽度与预测值基本相符。
Based on the background of the 31319 working face of Chahasu coal mine is used as the background,theoretical analysis,numerical simulation and field measurement are used to study the low flow nitrogen injection technology in the goaf of the large mining height working face of the shallow deep seam group.The results show that the oxygen concentration diffuses from high concentration to low concentration in the process of coal oxidation.In order to effectively inerting the gob,the nitrogen injection location should be selected in the area with small air leakage and low oxygen concentration.During the production process of the working face,the oxygen concentration in the goaf showed a decreasing trend as a whole with the distance from the working face.When nitrogen was injected at the 260 m position of the air inlet channel of the working face 31319,the oxygen concentration at the measuring point decreased significantly after nitrogen injection,and the width of the oxidation zone was basically consistent with the predicted value.
作者
白水全
王伟东
BAI Shuiquan;WANG Weidong(China Electric Power Construction Investment Inner Mongolia Energy Co.,Ltd.,Ordos 017209,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Fushun 113122,China)
出处
《煤炭技术》
2025年第4期210-213,共4页
Coal Technology
关键词
浅埋深
近距离煤层群
注氮
数值模拟
shallow-buried
close-distance coal seam group
nitrogen injection
numerical simulation
