Principles of mining : valuation, organization and administration; copper, gold, lead, silver, tin and zinc . other easy supply, materials from crosscuts driven into thestope-walls are sometimes resorted to. In working the system to the best advantage, the winzesthrough the block of ore under attack are kept in alignmentwith similar openings above, in order that filling may be pouredthrough the mine from the surface or any intermediate to be used for filling should be put on the hanging-wallside of the area to be filled, for the filling poured down will thenreach the foot-wall sid
Principles of mining : valuation, organization and administration; copper, gold, lead, silver, tin and zinc . other easy supply, materials from crosscuts driven into thestope-walls are sometimes resorted to. In working the system to the best advantage, the winzesthrough the block of ore under attack are kept in alignmentwith similar openings above, in order that filling may be pouredthrough the mine from the surface or any intermediate to be used for filling should be put on the hanging-wallside of the area to be filled, for the filling poured down will thenreach the foot-wall side of the stopes with a minimum of hand-ling. In some instances, one special winze is arranged for pass-ing all filling from the surface to a level above the principal stop-. ^ L t- V E. L ^
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillb
