高冒区瓦斯积聚区域特征数值模拟  

Numerical Simulation of Gas Accumulation Area Characteristics in Top-coal Caving Region

作　　者：李森[1,2] 何俊龙[3] 赵一超[1] 潘利强 刘昂[1] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]深部煤炭资源开采教育部重点实验室,江苏徐州221116 [3]国投新集能源股份有限公司新集三矿,安徽淮南232001

出　　处：《煤矿安全》2015年第4期13-15,19,共4页Safety in Coal Mines

摘　　要：巷道在掘进及工作面回采过程中,顶板垮落超过正常巷道或工作面的设计高度从而形成高冒区的现象日益凸显。高冒区不仅影响工程进度,对于高瓦斯矿井,在进风槽高冒区内还会造成瓦斯积聚。因此对高冒区瓦斯积聚进行了数值模拟,并将高冒区划分为风流影响区、环形紊流区、无风区3个区域。数值模拟结果显示,在风流影响区不会发生瓦斯积聚;环形紊流区中心有较少一部分瓦斯移动,浓度较低;瓦斯主要会在无风区积聚,是瓦斯治理的重点区域。The phenomenon is increasingly prominent that the roof caving excesses the normal roadway height or working face design height in the process of roadway excavation and working face mining.It not only affects the project progress,but it will also cause gas accumulation in top-coal caving region of inlet wind groove for high gas coal mine.On this basis,the numerical simulation is carried out for the gas accumulation of top-coal caving region,the top-coal caving region is divided into three regions including the wind flow influence area,the annular turbulent area,no wind area.The results show that the gas accumulation will not occur in the wind flow influence area; there is less gas movement in the center of annular turbulent area and the gas concentration is low; the gas accumulation mainly happens in no wind area,it is the key area of gas control.

关 键 词：厚煤层 综放开采 高冒区 瓦斯积聚 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]