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Mining Engineering Mine Supports And Strata Control Difficulty: Medium

Normal load, in hydraulic prop.

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The bearings of AB and AC are 41° and 116° 15' respectively taken from A. What is angle BAC. The height of any bench in coal shall not exceed . . . . . . . . the breadth there of shall not be less than the . . . . . . . . The solution of the following system of linear equations is x + 4y + 3z = 0 3x + 5y + 2z = 0 8x + 10y + 12z = 0 In beded rocks, when the beds are in between If the velocity of air in a settling chamber is 0.3 m/s terminal velocity of the particle is 0.19 m/s then find out h/l ratio of chamber assuming eddy factor 0.5.