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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Related Topics

coal seam mining ultimate pit design GATE Mining Engineering 2022 mining engineering gate coal seam thickness allowable stripping ratio safe slope angle coal density mining engineering problems GATE 2022 Set-4

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