采场瓦斯运移规律模拟及其治理措施分析  

Analysis on Gas Migration Law Simulation of Coal Mining Face and Gas Control Measures

作　　者：程涛[1] 杨胜强[1] 徐全[1] 吕文陵[1] 何磊[1] 

机构地区：[1]中国矿业大学安全工程学院煤炭资源与安全开采国家重点实验室,江苏徐州221008

出　　处：《煤炭科学技术》2010年第12期61-65,共5页Coal Science and Technology

摘　　要：基于渗流连续性方程、动力弥散方程,建立了U型通风工作面的瓦斯质量分数数学模型,并对瓦斯质量分数分布规律进行了模拟,发现采用U型通风系统,瓦斯最易积聚在工作面上隅角附近、采煤机附近和支架后部区域。在U型通风条件下,可通过均压通风或上下隅角吊挂风帘堵漏等措施解决上隅角和回风巷的瓦斯超限;当在煤层瓦斯含量较高且煤层自然发火危险性较低时,可采用U+L型、Y型通风系统,自然发火危险性较高时,采用U+I型通风系统并适当进行尾巷负压调节;对于高瓦斯工作面来说,应采用综合的瓦斯抽采方法。Based on the vadose continuity equation and the dynamic dispersion equation,a gas density mathematical model of the U type ventilated coal mining face was established.The gas density distribution law was simulated.It was found that with the application of the U type ventilation system,the gas would be easily gathered near the top corner of the coal mining face,at the surrounding areas of the coal shearer and at the rear areas of the powered supports.Under the condition of the U type ventilation,the constant pressurized ventilation,the air curtains set at the top and low corners to control the air leakage and other measures could be applied to solve the gas content over the limit at the top corner and in the air returning gateway.When the seam gas content would be high and the seam spontaneous combustion danger would be low,the U＋L type ventilation system and Y type ventilation system could be applied.When the seam spontaneous combustion danger would be high,the U＋I type ventilation system could be applied with a negative pressure adjustment at the tailgate properly.As for the high gassy coal mining face,a comprehensive gas drainage method could be applied.

关 键 词：U型通风 瓦斯超限 自然发火 均压通风 

分 类 号：TD712[矿业工程—矿井通风与安全]