深部高瓦斯综采面注氮防灭火方式优化模拟  

Optimization Simulation of Nitrogen Injection Method in High Gassy Fully Mechanized Mining Face

作　　者：许石青[1] 吴华帮 田世祥 吕正星 XU Shi-qing;WU Hua-bang;TIAN Shi-xiang;LYU Zheng-xing(Mining College,Guizhou University,Guiyang 550025,China;Shanjiaoshu Mine,Guizhou Panjiang Refined Coal Co.,Ltd.,Liupanshui 553533,China;Qianxi County Administration of Work Safety,Bijie 551500,China)

机构地区：[1]贵州大学矿业学院,贵阳550025 [2]贵州盘江精煤股份有限公司山脚树矿,贵州六盘水553533 [3]黔西县安全生产监督管理局,贵州毕节551500

出　　处：《煤炭技术》2018年第10期234-237,共4页Coal Technology

摘　　要：为研究某矿1422高瓦斯工作面注氮防灭火优化方案的适用性,采用数值模拟软件建立并开发相应的CFD模型,模拟了不同注氮形式下采空区内温度场及氧气浓度的变化,并将模拟结果与实际监测比较,得到相同的变化趋势。模拟结果表明:工作面后100 m处的注氮可以很好地抑制氧气涌入采空区深部,缩小采空区高温区域的范围,增加注氮量对降温防灭火效果显著。相同注氮量下,联合注氮的防灭火效果比单一注氮孔好。Taking coal mine as the research background,the applicability of the simulation of the 1422 high gas working face nitrogen injection optimization scheme,using CFD software to establish the model and develop the corresponding numerical simulation,simulation of different forms of nitrogen in the gob under the temperature field and the change of oxygen concentration,and the simulation results are compared with the actual monitoring,have the same trend.The simulation results show that the shallow injection of nitrogen at the 100 m after the working face can only reduce or decrease the temperature near the nitrogen injection port,and the increase of nitrogen injection does not play a very good role in cooling down,and the utilization rate of nitrogen is low.The effect of deep nitrogen injection on the gob is better than that of the shallow zone,so it can suppress the temperature moving deep into the gob.

关 键 词：高瓦斯 渗透率 浅部注氮 温度场 CFD模型 

分 类 号：TD713[矿业工程—矿井通风与安全]