高位钻孔瓦斯抽放采空区自燃“三带”的数值模拟  

Numerical simulation on spontaneous combustion "Three Zones" in goaf after gas drainage with high-level boreholes

作　　者：叶正亮[1,2] 

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆市沙坪坝区400037 [2]中煤科工集团重庆研究院,重庆市沙坪坝区400037

出　　处：《中国煤炭》2012年第7期85-89,共5页China Coal

摘　　要：通过简化模型代替采空区复杂流动环境,建立采空区漏风流场的数学物理模型;利用FLUENT软件模拟采空区气体速度场、氧浓度场分布,根据双指标综合划分采空区自燃"三带";分别对1301工作面正常回采时和高位钻孔抽放条件下采空区自燃"三带"数值模拟,得出高位钻孔抽放对采空区自燃"三带"的影响范围,实现现场无法到达情况下的理论分析。The mathematical physical model was established for the air leakage in goaf by the simplified model rather than complex flow environment. The distribution Of gas velocity field and oxygen concentration field in goal were simulated by using FLUENT software. And the spontaneous combustion ＂Three Zones＂ in goaf were divided according to double indexes. The spontaneous combustion ＂Three Zone＂ in goaf were numerical simulated for normal mining and mining under gas drainage condition with high-level boreholes on No. 1301 working face. Consequently, the influence： scope of gas drainage with high-level boreholes on spontaneous combustion ＂Three Zones＂ in goaf was obtained, and the theoretical analysis was completed without entering the site, which provides great guiding significance on field application.

关 键 词：高位钻孔 瓦斯抽放 采空区自燃三带 数值模拟 

分 类 号：TD752[矿业工程—矿井通风与安全]