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Mining Engineering Mine Economics Difficulty: Medium

The cash flow table of a manganese mine for a particular year is shown below: Item Amount (Rs. in lakhs) Revenue 900 Cost (other than depreciation) 300 Depreciation 100 Profit before tax 500 If the corporate tax is 50% of the profit before tax, operating cash inflow in lakhs of rupees is

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More Mining Engineering Questions

It's a coal mining extraction method where simultaneous development and extraction is done and parallel faces are separated by a series of fender block of coal. The mining is known as For a curve of radious 100m and normal chord 10m, the Rankine's deflection angle is Determine the correctness or otherwise of the following Assertion [a] and the Reason [r] . Assertion: Both intake and return side stoppings must closed simultaneously in the event of sealing off a coal mine panel with explosion hazard following a fire. Reason: By continuously ventilating the area till simultaneously closure of the stoppings, the possibility of an explosion hazard due to gas built is avoided. The process which involves reacting the ore with liquid solvent that will dissolve the mineral at low or moderate temperature and pressure is called In block caving operation the draw points are placed at 20 m centre to centre, with the pillar width 3.5 m as shown in figure below. The muck is assumed to have zero cohesion and 35 friction angle. The height of draw cone (h) in m is