基于CFD模拟的巷道煤壁喷涂对瓦斯抽采影响研究  

Effect of coal wall spraying in roadway on gas drainage based on CFD simulation

作　　者：成艳英[1,2] 林柏泉[1,2] 郝志勇[1,2] 李子文[1,2] 高亚斌[1,2] 

机构地区：[1]中国矿业大学安全工程学院,江苏省徐州市221116 [2]煤炭资源与安全开采国家重点实验室,江苏省徐州市221116

出　　处：《中国煤炭》2013年第4期86-90,共5页China Coal

基　　金：国家重点基础研究发展(973)计划(2011CB201205);国家自然科学基金项目(51074161);中国矿业大学煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM08X03);中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金资助项目(09KF09)

摘　　要：通过对我国煤矿瓦斯抽采中遇到的问题进行分析,指出当前造成瓦斯抽采效果差的主要原因是巷道空气通过煤壁裂隙向钻孔的渗入。结合现场本煤层瓦斯抽采钻孔布置情况,建立数值计算模型。运用FLUENT软件模拟了未喷涂巷道和喷涂巷道两种情况下的瓦斯抽采过程,通过对瓦斯压力变化情况的分析,验证了未喷涂情况下瓦斯向外部涌出以及外部空气向钻孔渗入的现象,对比模拟了理想喷涂情况下瓦斯抽采过程,得出在实际瓦斯抽采工作中,壁面喷涂能够有效减少负压损耗,应当尽一切可能地进行壁面喷涂的结论。The air infiltrated into the drilled hole from the coal wall fracture, which was pointed out as the main reason for the less efficient of gas drainage by analyzing the gas drainage problems existing in coal mines in China. The numerical calculation model was established via combining the boreholes arrangement in this coal seam. The gas drainage processes in the Sprayed and unsprayed roadways were simulated by FLUENT software. The phenomenon of gas emission and air infiltration under the un-spraying condition were validated based on the analysis of the gas pressure variation. The gas drainage process under the ideal spraying condition was simulated contrastively, and a conclusion was gotten that coal wall spraying could reduce the neg- ative pressure loss effectively for the real gas drainage so that the wall spraying should he done by everything possible.

关 键 词：CFD模拟 空气渗入 喷涂 瓦斯抽采 瓦斯压力 煤壁裂隙 钻孔 

分 类 号：TD712.6[矿业工程—矿井通风与安全]