Mining Methods and Machinery · Mining Methods · 2 marks · Numerical answer
A void100×2×1.2 m is hydraulically filled in3 h. Sand/slurry volume ratio is0.4 and hydraulic fill factor0.9. Find hourly water consumption in m³ to two decimals.
Void volume is240 m³. The fill-factor convention used gives required sand volume240×0.9=216 m³. Slurry volume is216/0.4=540 m³,of which324 m³ is water. Divide by3 h to obtain108 m³/hour. State the fill-factor convention because reversing it would change the result.
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