Mine backfill design and testing

CIM Bulletin, Vol. 72, No. 801, 1979

ROBERT J. MITCHELL, Professor of Civil Engineering, Queen's University, Kingston, Ontario, JOHN D. SMITH, J. D. Smith Engineering Associates Ltd. Kingston, Ontario

A general approach to mine backfill design, including laboratory testing procedures, is outlined in this paper. Relationships between certain design parameters are developed and the effect of other factors is discussed. It is concluded that the inclusion of backfill design calculations at an early stage of mine design can often produce over-all design economies. Not only are the data needed for backfill plant and tailings disposal area design, but also the pillar recovery method and over-all mine stability are dependent on the attainable fill properties.
Keywords: Underground mining, Backfill design, Tailings, Mine layout, Drainage, Cement, Slimes, Percolation tests, Strength tests, Compressibility, Hydraulic backfilling