摘要
运用渗流理论和瓦斯流动弥散方程建立了采空区瓦斯运移数学模型,并结合通风网络解算理论对某矿1307工作面三源二汇采空区瓦斯浓度场进行了数值模拟,分析了多种因素的影响.结果表明:多源多汇采空区瓦斯浓度场比一源一汇复杂,漏风汇位于采空区上层时,瓦斯浓度降低幅度更大;泄排巷相当于漏风汇,具有分流采空区瓦斯的作用,并且其位置离回风巷越近,分流效果越好;模拟结果与实际相符.
The mathematical model of gas migration in goaf was established, based on the theory of seepage and dispersion equation of gas＇ s one-dimension flow. Numerical simulation was made for gas concentration field of three-source two-congruence in 1307 working face of some coal mine, combining with ventilation network solution. A few influence factors were analyzed. The simulation results indicate that gas concentration field of multi-source and multi-congruence is more intricate than that of one source one congruence. When air leak congruence situates goal＇ s top layer, gas concentration degradation amplitude is much larger. Drainage gas lane acts as air leak congruence, which has the function of diffluencing gas. And the closer is the distance from its position to return airway, the better diffluence effect is. Simulation results were in good line with the practical case.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第4期396-401,共6页
Journal of China Coal Society
关键词
多源多汇
泄排巷
瓦斯运移
数值模拟
multi-source multi-congruence
drainage gas laneway
gas migration
numerical simulation
