Swellex Rock bolt Drilling and Installation process in Usbrl tunnel Swellex rock bolting system
It is a unique rock bolt, as it is made out of a welded tube folded onto itself and sealed at one extremity. It is re-expanded using a high pressure water flow provided by a special pump and adapter. The bolt is expanded inside the borehole drilled into the excavation wall.
Негізгі бет Support in tunnel Swellex Rock bolt Drilling and Installation process in Usbrl tunnel
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