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在采掘作业中,常因掘进独巷达到指定位置后未能及时与前方贯通,而使掘进独巷里积聚大量高浓度的瓦斯和二氧化碳。贯通前,必须对掘进独巷采用排放瓦斯措施,以保证巷道的顺利贯通。过去我们采用逐段距离推进排放法排放独巷的瓦斯或二氧化碳,但此法明显存在以下几点不足:①须重新安装局扇,敷设风筒(往往一条掘进独巷长达600～1000m),造成一次性风筒投入量大;②安设局扇造成电耗增多;③工作人员在高浓度瓦斯区作业,进入里面必须佩戴呼吸器或自救器,安全上受威胁;④常需要4～5
In mining operations, often due to tunneling reach the designated location after the failure to timely and front through, leaving the excavation of the alley to accumulate a large number of high concentrations of methane and carbon dioxide. Before penetrating, it is necessary to adopt gas drainage measures for tunneling in order to ensure smooth tunneling. In the past, we used gas-phase or carbon dioxide emission-by-discharge to drive the exclusive alley. However, this method obviously has the following deficiencies: (1) It is necessary to reinstall the fan and wind tunnel (usually a tunnel of up to 600-1000m) Resulting in a large amount of disposable tube into the wind; ② installation bureau fan caused by increased power consumption; ③ staff in the high concentration gas zone operations, which must wear respirators or self-help inside, threatened by safety; ④ often need 4 to 5