采空区自燃带和瓦斯分布规律的数值模拟  

Numerical simulation on goaf spontaneous combustion zone and influence of gas distribution

作　　者：刘佳佳[1] 高建良[2,3] 王丹[1] 

机构地区：[1]黑龙江科技学院安全工程学院,哈尔滨150027 [2]河南理工大学安全科学与工程学院,河南焦作454003 [3]河南理工大学瓦斯地质与瓦斯治理国家重点实验室,河南焦作454003

出　　处：《黑龙江科技学院学报》2012年第6期562-566,共5页Journal of Heilongjiang Institute of Science and Technology

基　　金：国家自然科学基金项目(51174079);黑龙江省自然科学基金项目(B2007-10)

摘　　要：利用计算流体力学(CFD)软件Fluent对潞安集团某矿6206综采工作面采空区进行数值模拟,研究工作面采用Y型通风系统时采空区自燃带和瓦斯的分布规律。结果表明:将6206综采工作面改造为Y型通风系统后,工作面和采空区的最低负压区在回风巷出口处,涌出的瓦斯涌入回风巷后排出,工作面向采空区的漏风量较大,散热带基本处于采空区整个区域内,自燃带范围较小;Y型通风方式可以有效防止采空区煤炭自燃,解决上隅角瓦斯积聚和回风巷瓦斯超限问题。工作面的理论计算风速值与数值模拟风速值吻合,验证了数值模拟方法的可靠性。This paper introduces a numerical simulation of Lu＇an Group,a 6206 mine fully mechanized mining working face goaf,by using the computational fluid dynamics（CFD） software Fluent and presents a study of the law governing the goaf spontaneous combustion zones and gas distribution,as occurs in the application of Y type ventilation system to working face.The results show the reconstruction of 6206 fully mechanized coal face into Y type ventilation system leads to the occurrence of minimum negative pressure zone of working face and goaf in the air return tunnel exit,resulting in emission gas influxing into return to be discharged and consequently greater air leakage from working face to goaf,thus allowing the whole area of goaf to be cooled,providing a smaller spontaneous combustion range.Y type ventilation system affords an more effective prevention of the spontaneous combustion of coal in goaf,and a better solution to the gas accumulation in the upper corner and gas overrun in return airflow roadway.The theoretical calculation and numerical simulation of wind velocity data verify the reliability of numerical simulation.

关 键 词：Y型通风 采空区 瓦斯运移 数值模拟 

分 类 号：TD724[矿业工程—矿井通风与安全]