一面四巷高位瓦斯抽采及浮煤自燃耦合研究  

Spontaneous heating and gas drainage on a coal face with "four-gateroad" and overlying drainage tunnel

作　　者：张玫润 杨胜强[1] 程健维[1] 宋万新[1] 焦汉林[1] 张淦星[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室安全工程学院煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [2]马依煤业有限公司,贵州盘县553507

出　　处：《中国矿业大学学报》2013年第4期513-518,共6页Journal of China University of Mining & Technology

基　　金：国家重点实验室自主课题项目(SKLCRSM11X01);国家自然科学基金项目(51174198)

摘　　要：以15101综放面为背景,研究了"一面四巷"布置方式下的高抽巷负压对卸压瓦斯抽采和采空区自燃相互耦合关系的影响.通过建立理论模型,测定现场的边界条件及有关数值模拟参数的设定,进行了大量的数值模拟.结果表明高抽巷负压的增大可以大幅度提高瓦斯抽采率,并且使尾巷瓦斯浓度大幅降低.高抽巷负压的变化对自燃三带的影响较小,但在高抽巷及内错的作用下,采空区漏风量大大增加,则采空区自然发火危险性也大大增加.根据尾巷的瓦斯浓度上限为2.5%,确定15101工作面高抽巷最佳负压为2.486kPa.Based on the 15101 working face,this paper investigates coupling effects between gas drainage and spontaneous heating of residual coal in goaf due to the suction pressure in overlying drainage gateroad in the face with four-gateroad system.Extensive numerical simulations are conducted by setting up the theoretical model,field measurements of boundary conditions and other model parameters.The results show that increasing the negative pressure in overlying drainage gateroad can greatly improve gas drainage efficiency.Methane concentration can also be greatly reduced in the tailgate.The changes of the negative pressure have a little significant effect on the ＂three-zone＂ of spontaneous combustion in the gob area.However,if both a high level drainage gateroad and an inner stagger drainage entry exist in the working face,these may lead to significant air leakage in the goaf and consequently increase the risk of combustion heating.The optimum negative pressure can be determined as 2.486 kPa according to the upper gas limit of 2.5% in tailgate in the 15101 working face.

关 键 词：高抽巷 瓦斯抽采 自燃防治 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全] TD752