Question   A mine void of dimension 100.0 m x 2.0 m x 1.2 m is to be filled in 3 hours by hydraulic stowing. The sand to slurry ratio is 0.4. If the hydraulic fill factor is 0.9. the hourly consumption of water for the operation, in m 3 , is ____ (rounded off to 2 decimal places. Solution   V mine  void =100.0 × 2.0 × 1.2 = 240.0 m 3   V sand  = V void  × fill factor   = 240.0 × 0.9   = 216.0 m 3   V slurry  = V sand /0.4 = 216/0.4 = 540 m 3   V water  = V slurry   - V sand   = 540 - 216 = 324 m 3   Hourly water consumption   = 324/3 = 108 m 3 These questions are taken from study material for mining engineering exams (DGMS and PSU) by amiestudycircle.com . With our study material which is prepared by IIT, Roorkee faculty (Retd.), no text book study is required.   Question  A pit slope has the following information:   Number of benches = 5   Height of each bench = 8 m   Bench slope angle = 70 degree   If width of one bench is 24 m and that of other four benches is 10 m ...
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