深井综放采空区漏风流场数值模拟及自燃危险区域划分  

Modeling of Flow Field and Partition of Spontaneous Combustion Danger Zone in Gob of Fully Mechanized Caving Face in Deep Coalmine

作　　者：文虎[1,2] 赵阳[1] 肖旸[1,2] 马砺[1,2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西部矿井开采与灾害防治教育部重点实验室,陕西西安710054

出　　处：《煤矿安全》2011年第9期12-15,共4页Safety in Coal Mines

基　　金："长江学者和创新团队发展计划"创新团队资助项目(IRT0856);国家"十一五"科技支撑计划资助项目(2007BAK29B03);陕西省教育厅专项科研计划资助项目(09JK590)

摘　　要：随着矿井开采深度的增加,地温的升高,带来了系列的灾害现象。分析了高地温综放采空区煤自燃的危险性,研究了采空区氧浓度场及漏风流场。通过对龙固矿N1301综放面采空区漏风场的数值模拟,得出了采空区渗流速度及氧浓度分布。并结合实验得出的放热强度、自然发火期等参数,对采空区浮煤自燃危险区域进行了划分,得到了工作面最小安全推进速度,为2.56m/d。As increasing the mining depth in coalmine,the series calamities are happened by more and more strengthening mining strength and rising ground temperature.The danger of preventing and extinguishing technology of spontaneous combustion in goaf of fully mechanized caving face in deep and high temperature coalmine was analyzed,the and oxygen concentration field and air-leakage flow field in goaf of top-coal caving with false dip in thick seam was studied.Through numeric simulation,distribution of oxygen concentration and velocity of air flow in mined out area are deter-mined.With the simulating result together with critical value and the duration of coal spontaneous combustion obtained from experiment,boundary of self-heating zone is partitioned,and got the safe advancing is 2.56m/d.

关 键 词：高地温 深井 数值模拟 采空区 

分 类 号：TD752.2[矿业工程—矿井通风与安全]