姚桥煤矿8059工作面采空区注CO_(2)防灭火技术参数优化模拟与应用研究  

Study on the optimization simulation and application of technical parameters of CO_(2) injection for fire prevention in goaf in 8059 working face of Yaoqiao Coal Mine

作　　者：姜奎[1] 王怡 任广意 姚向东[1] 吴奎斌 JIANG Kui;WANG Yi;REN Guangyi;YAO Xiangdong;WU Kuibin(Ventilation Department of Jiangsu Branch of Shanghai Datun Energy Co.,Ltd.,Yaoqiao 212136,China;College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]上海大屯能源股份有限公司江苏分公司通风部,江苏姚桥212136 [2]山东科技大学安全与环境工程学院,山东青岛266590

出　　处：《矿业安全与环保》2021年第3期74-78,84,共6页Mining Safety & Environmental Protection

摘　　要：为了解决姚桥煤矿8059工作面采空区遗煤自然发火问题,建立了采空区渗流场几何模型,采用数值模拟的方法,研究了CO_(2)在不同压注位置、不同压注流量条件下的采空区O_(2)体积分数分布情况。研究结果表明:未注入CO_(2)时,采空区最大氧化带宽度为60 m左右;压注CO_(2)后,最大氧化带宽度减小为20 m左右,氧化带宽度随着CO_(2)注入量的增加而减小,采空区内O_(2)体积分数尤其是在进风一侧显著下降;最佳注气口位于进风巷一侧距工作面约40 m处,注入量为540~720m^(3)/h时较为合适。通过采空区现场压注CO_(2),有效地消除了采空区遗煤自然发火隐患,保障了工作面的安全生产。In order to solve the problem of spontaneous combustion of residual coal in goaf in 8059 working face of Yaoqiao Coal Mine,a geometric model of the goaf seepage field was established.By means of numerical simulation,the distribution of O_(2) volume fraction in goaf was studied under different injection positions and injection flows of CO_(2).The results show that when CO_(2) is not injected,the maximum oxidation zone width in goaf is about 60 m;after CO_(2) injection,the maximum oxidation zone width is reduced to about 20 m,the oxidation zone width decreases with the increase of CO_(2) injection,the O_(2) volume fraction in goaf decreases significantly,especially in the air inlet side;the best CO_(2) injection port is located at one side of the air inlet roadway about 40 m away from the working face,when the injection volume is 540m^(3)/h to 720m^(3)/h,it is relatively suitable.Through the on-site pressure injection of CO_(2) in goaf for fire prevention,the hidden danger of spontaneous combustion in goaf is effectively eliminated,and the safe production of the working face is guaranteed.

关 键 词：采空区 煤自燃 CO_(2)防灭火 数值模拟 FLUENT 自燃“三带” 

分 类 号：TD752.2[矿业工程—矿井通风与安全]