我矿是个老矿,随着开采的不断延深,煤层中瓦斯也随着增大。一些掘进工作面每月由于计划停电和非计划停电使局部扇风机停风造成瓦斯积存高达20～30次。对生产和人身安全是个严重威胁,迫切需要有保证掘进工作面局扇不断风的技术措施。为此我们搞了双电源、双风机自动切换的技术改造。有了这个装置后,只要两台风机中任何一台出现故障或停电,均能自动迅速地启动备用 Mine is an old mine, with the continuous deepening of mining, coal seam gas also increases. Some excavation face due to planned blackouts and unplanned power outages each month to stop the local fan wind caused gas accumulation up to 20 to 30 times. It is a serious threat to production and personal safety. There is an urgent need for technical measures to ensure continued progress in tunneling. To this end we engage in dual power supply, dual fan automatic switching technology. With this device, as long as any one of the two fans fails or power outage, can automatically and quickly start standby