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Until recently, coal in Cape Breton field was mined by pillar-and-stall methods; with heavier cover, increased cost of roadway maintenance made change to longwall method an economic necessity. Brief abstract of paper read before Min. Soc. of Nova Scotia, indexed in Engineering Index, 1928, p. 440, from Can. Min. and Met. Bul., Dec. 1928. (see also Can. Min. Jl., vol. 50, no. 27, July 5, 1929, pp. 619-620)
Until recently, coal in Cape Breton field was mined by pillar-and-stall methods; with heavier cover, increased cost of roadway maintenance made change to longwall method an economic necessity. Brief abstract of paper read before Min. Soc. of Nova Scotia, indexed in Engineering Index, 1928, p. 440, from Can. Min. and Met. Bul., Dec. 1928. (see also Can. Min. Jl., vol. 50, no. 27, July 5, 1929, pp. 619-620)
Longwall mining at Sydney mines
Colliery Guardian
McDougall, J.J. (author)
Colliery Guardian ; 138
1929
Article (Journal)
English
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Longwall mining at Sydney mines
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