Summary of Hydraulic Backfill Operations in Selected Underground Mines, Coeur D' Alene Mining District, Idaho.
NTIS: PB/259-209 Available for Reference At Bureau Libraries :187 pages
A study was made of established operating procedures and cost bases for hydraulic backfilling at four selected mines in the Coeur d'Alene Mining District. Total average mining costs per ton, including applicable hydraulic backfill costs, increased from about $10.20 Per ton for stopes in the first 25 ft above the haulage sill to about $12.70 For stopes near 200 ft above the sill. Necessary long travel and other required nonproductive time for miners amounted to about 42 pct of the total shift; this indicates the importance of effectively maintaining the productivity of the miner while he is in the stope. In general, the mining operations do not have sufficiently detailed data to permit the evaluation of varying mining and hydraulic backfill costs under different stoping conditions. A computer program was developed to permit the economic evaluation of stopes utilizing potentially cost-saving high modulus fill methods.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/259-209 Available for Reference At Bureau Libraries
W. A. Wahler and Associates