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掘进中的岩巷最低允许风速为多少

更新时间: 2021-06-17 13:59:46     

1、掘进中的岩巷最低允许风速0.15m/s。

2、风速,是指空气相对于地球某一固定地点的运动速率,常用单位是m/s ,1m/s = 3.6 km/h。风速没有等级,风力才有等级,风速是风力等级划分的依据。一般来讲,风速越大,风力等级越高,风的破坏性越大。

关键词: 掘进 最低 允许 风速 多少

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