Mining Engineering > GATE 2022 > Surface Mining
A coal seam of uniform thickness 12 m is dipping at an angle 30° as shown in the figure. The ultimate pit is demarcated based on allowable instantaneous stripping ratio of 10 m3/tonne and safe slope angle of 45°. The density of coal is 1.41 tonne/m3. The length, L in m is _________. (round off to two decimal places)
Correct : 320.00
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