大采高长工作面采空区煤炭自燃“三带”划分及注氮效果研究  

Study on "Three Zones" Division of Coal Spontaneous Combustion and Nitrogen Injection Effect in Goaf of Long Large Mining Height Working Face

作　　者：袁光明[1] 刘建绘 黄阳全[1] 冯明伟 YUAN Guangming;LIU Jianhui;HUANGYangquan;FENGMingwei(Chongqing Vocational Institute of Engineering,Chongqing,402260,China;China Coal Xinji Energy CO. ,LTD. ,Fuyang,236000,China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]中煤新集能源股份有限公司,安徽阜阳236000

出　　处：《华北科技学院学报》2019年第3期33-40,共8页Journal of North China Institute of Science and Technology

摘　　要：以某煤矿厚煤层长距离工作面采空区实际情况为背景,采用现场实测法监测采空区不同范围O2、CO、CO2及CnHm(烷烯烃类)等气体浓度,通过整理分析得到采空区不同深度范围上述各类参数的变化规律,并研究得到采空区遗煤"三带"范围。在此基础上,利用数值模拟软件对采空区注N2效果进行模拟分析,得出在注N2口附近及采空区深部注N2效果明显,通过对不同深度位置设置注N2口的模拟,得到最佳注N2口距离工作面10~20 m。Based on the actual situation of goaf in long distance working face of thick coal seam in a coal mine, the field measurement method is used to monitor the concentration of temperature,oxygen,carbon monoxide and carbon dioxide in different areas of the goaf. By means of sorting and analysis,the variation rules of the a- bove parameters in different depths of goaf are acquired,and the "three zones" range of residual coal in goaf is obtained According to this,the effect of nitrogen injection in goaf is simulated and analyzed through numerical simulation software,thereby concluding that the effect of nitrogen injection in the vicinity of nitrogen injection port and deep goaf is obvious. By simulating nitrogen injection port in different depths,the optimum nitrogen injection port is approximately 10~20m distant from the working face.

关 键 词：厚煤层 长工作面 采空区 自燃“三带” 注N2位置 数值模拟 

分 类 号：TD752.2[矿业工程—矿井通风与安全]