引流器与尾巷治理上隅角瓦斯的数值模拟及应用实践  

Numerical simulation and application of controlling gas accumulation in upper corner of drainage instrument and tail roadway

作　　者：王凯[1,2] 蒋曙光[1] 马小平[2] 吴征艳[1] 邵昊[1] 张卫清[1] 裴晓东[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221116 [2]中国矿业大学信息与电气工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2015年第5期864-870,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金青年基金项目(51404263);江苏省自然科学基金青年基金项目(BK20130203);河南省瓦斯地质与瓦斯治理重点实验室--省部共建国家重点实验室培育基地开放课题项目(WS2013A05);国家自然科学基金煤炭联合基金项目(51134023);江苏高校优势学科建设工程项目

摘　　要：为了解决S5-2工作面上隅角瓦斯波动超限的问题,分析了回采工艺、周期来压等因素对其产生的影响,提出了优化尾巷配置及采用引流器综合改变上隅角瓦斯涡流场,高效控制瓦斯波动超限的方法。运用Fluent数值模拟研究了采用引流器不同引流量改变上隅角风流-瓦斯涡流场的效果,局部风流的风速、风压分布特征;对不同尾巷的步距及配风量的风排瓦斯效果进行了数值模拟,分析了配置尾巷的工作面及采空区风流-瓦斯流场中,不同区域风速、风压及瓦斯含量的分布特征。结合模拟结果,确定了S5-2工作面尾巷最佳配风量与步距,引流器的最佳配置方法。跟踪监测结果表明控制上隅角瓦斯波动超限效果显著。In order to solve the problem of fluctuation overrun of gas in upper corner of S5-2 working face, the paper has analyzed some elements like coal mining technology and periodical weighting to expound the cause of the upper corner gas fluctuation overrun. The method that the drainage device is used to change the corner eddy current field has been provided to optimize the tail-road configuration and to change the upper-corner gas vortex field with drainage instrument and to control the fluctuation overrun of gas accumulation efficiently. The Fluent numerical simulation, establishing the upper corner gas air-eddy current field model, has been used to simulate the effect of using the different drainage volume of drainage device to change the upper corner air-gas vortex, and the distribution characteristics of wind speed, wind pressure of local wind. And the ventilation effects for different tail step distance and air distribution numerically have been simulated to analyze the distribution characteristics of wind speed, wind pressure and gas concentration in different places in the working face of configuration and the goaf air flow-gas flow field mode. Combined with the simulating results, the best air distribution amount and step distance of tail roadway in S5-2 working surface and the best method of drainage instrument configuration have been determined. The monitoring results have shown that it has obvious effect on the gas fluctuation limit in upper corner.

关 键 词：上隅角 引流器 风流-瓦斯 尾巷 步距 

分 类 号：TD712[矿业工程—矿井通风与安全]