...Also, since something that is as white as possible, inexpensive, and available in large quantities is required, limestone powder is generally used. There are two methods for preventing explosions locally: the rock powder shelf method and the water shelf method. In the former, when an explosion occurs, the pressure of the wind causes a shelf loaded with rock powder set up in the tunnel to overturn, and the scattered rock powder creates a thick rock powder cloud that prevents subsequent explosions. ... *Some of the terminology used in reference to the "Rock Powder Shelf Method" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…また,なるべく白色で安価,大量に入手可能なものが求められるため,一般的には石灰石の粉末が使用されている。爆発を局部で防止する方法には岩粉棚法,水棚法がある。前者は,爆発の際その圧風によって坑道に設置しておいた岩粉積載の棚が転覆し,飛散した岩粉が濃厚な岩粉雲をつくって後から来る爆炎を阻止する方法である。… ※「岩粉棚法」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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