AMIE Study Circle Blog

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). (GATE 2025) 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 ben...