综采工作面间断通风瓦斯时空演化特征规律  

Temporal and Spatial Evolution Characteristics of Gas at Fully Mechanized Face under Condition of Intermittent Ventilation

作　　者：曹银平 张国杰[1] CAO Yin-ping;ZHANG Guo-jie(China University of Mining and Technology,Xuzhou 221116,China;Shanxi Jinhui Group,Taiyuan 030000,China)

机构地区：[1]中国矿业大学,江苏徐州221116 [2]山西金辉集团,太原030000

出　　处：《煤炭技术》2018年第12期134-136,共3页Coal Technology

摘　　要：为避免工作面因主扇停风而引起的瓦斯灾害事故,利用Fluent软件对间断通风条件下工作面的瓦斯浓度变化规律进行了数值模拟,并结合矿井的实际监测数据,验证了模拟结果的正确性。结果表明:停风降低了工作面的瓦斯涌出强度,也极大地降低了瓦斯与风流的对流扩散作用,从而造成工作面瓦斯积聚,工作面瓦斯浓度上升速度随着停风时间的延长而逐渐衰减。To avoid the gas disaster caused by main fan wind stop,the variation of gas concentration at the working face under the condition of intermittent ventilation is simulated by using Fluent,and the correctness of the simulation results is verified by the actual monitoring data of the mine.The results show:the gas.emission intensity at the working face is cut down after the wind stop,at the same time, the convection diffusion between gas and flow also greatly working face;the rising velocity of the gas concentration is reduced,resulting in gas accumulation at the fading with the extension of wind stoo time.

关 键 词：综采工作面 间断通风 瓦斯浓度 

分 类 号：TD712[矿业工程—矿井通风与安全]