Bulkhead pressure measurements in model fill pours

CIM Bulletin, Vol. 77, No. 868, 1984

ROBERT J. MITCHELL, Professor of Civil Engineering, JAMES J. ROETTGER, Research Assistant, Queen's University, Kingston, Ontario

The results of a series of model slope pours designed to investigate working pressures on bulkheads during hydraulic pouring of classified tailings backfill are reported. Total bulkhead pressures and fill water pressures were monitored under the condition of a fully saturated backfill. Similitude of the model testing is discussed and equations are developed to estimate bulkhead pressures under prototype conditions. The model results show that good base drainage, combined with a bulkhead setback, can reduce the expected bulkhead pressures to values such that timber or concrete block structures should be capable of supporting a saturated backfill.
Keywords: Rock mechanics, Strata control, Bulkhead pressures, Backfill, Underground mining, Drainage, Sloping
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