摘要
2111工作面原先通风方式为压入式U型通风,在工作面回采过程中瓦斯检测仪检测到工作面上隅角瓦斯浓度达到了13.1%,给煤矿安全生产造成了隐患,为了保证工作面的安全回采并有效的降低瓦斯超限的问题,矿方采用Fluent软件对整个回采面建立了模型,数值模拟后得出瓦斯积聚在压实稳定区即回风巷后方采空区,而且瓦斯容易逸散至采空区上部断裂带,为此矿方采用了Y型通风+顶板高位钻孔瓦斯抽采对2111工作面进行了治理,抽采后根据现场实测得出工作面上隅角瓦斯浓度稳定在0.5%左右,降低幅度为96.1%,瓦斯浓度得到了有效控制,为煤矿生产提供了安全保障。
The original ventilation mode of the 2111 working face is press-in U-shaped ventilation.During the recovery process of the working face,the gas detector detected that the gas concentration of the corner on the working surface reached 13.1%,which caused hidden dangers to the safe production of the coal mine.Safely recovering and effectively reducing the problem of gas overrun,the mine used Fluent software to establish a model for the entire mining face.After numerical simulation,the gas accumulated in the compaction zone,that is,the gob area behind the return airway,and the gas is easy to escape.It is scattered to the upper fault zone of the goaf.For this reason,the mine adopts Y-type ventilation+roof high-level borehole gas drainage to control the 2111 working face.After the extraction,according to the field measurement,the gas concentration in the working face is stable.At about 0.5%,the reduction is 96.1%,and the gas concentration is more effectively controlled,which provides safety for coal mine production.
作者
张鹏飞
ZHANG Pengfei(Department of Ventilation,Jinbei Coal Industry Co.,Ltd.,Huozhou Coal and Electricity Group,Huozhou 035100,China)
出处
《煤矿现代化》
2020年第4期99-101,104,共4页
Coal Mine Modernization
关键词
上隅角瓦斯
数值模拟
瓦斯抽采
高位钻孔
Upper corner gas
numerical simulation
gas drainage
high drilling
