A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Of nine mines working open pits, some are operating underground as well, or developing to gradually switch to underground extraction; form of ore body and operations at enormous spiral pit of Jeffrey Mine (Canadian Johns-Mansville Co) are contrasted with Cassiar Mine (Cassiar Asbestos Corp) in northern British Columbia, which is small and of totally different aspect physically.
Of nine mines working open pits, some are operating underground as well, or developing to gradually switch to underground extraction; form of ore body and operations at enormous spiral pit of Jeffrey Mine (Canadian Johns-Mansville Co) are contrasted with Cassiar Mine (Cassiar Asbestos Corp) in northern British Columbia, which is small and of totally different aspect physically.
Open pit asbestos mining in Canada
Asbestos
Sinclair, W.E. (author)
Asbestos ; 40
1959
Article (Journal)
English
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