Reply on topic: Bulgaria: Zheleznitsa Tunnel Construction Collapsed. 3 Workes in Hospital
This news English better than my English. I think tunnel is drill and blast method tunnelling. https://www.novinite.com/articles/205039/Rock+Mass+Collapsed+During+the+Construction+of+the+Zheleznitsa+Tunnel%2C+Three+Workers+InjuredReply on topic: Australia: Snowy Hydro refutes the claims that the TBM stopped boring
In a separate development; Sky News says Snowy 2.0 suffered partial tunnel collapse due to “drill and blast” operations in an adjacent tunnel. The part ofter 3:47 are relevant. https://youtu.be/ZY5rPjDxXGg?t=226BRO DG carries out first blast at south portal of Sela tunnel on Army Day
Border Roads Organisation (BRO) Director General travelled around 500 km by road carried out the first blast of the south portal of the Se.... https://in.news.yahoo.com/bro-dg-carries-first-blast-...Reply on topic: Sondaj delgisi, İstanbul havaalanı tünelinin tavanını deldi
https://www.dailymotion.com/video/x8rme6q Some building contractor over th...by Sözcü newspaper, the drill is seen, still running, boring...erious accident is only prevented by the drill...Nagasaki, when a geological survey drill b...
cover tunnel photo by: Matt Brown from London, England / CC BY
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