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More Mining Engineering Questions
A vertical ore body having a consistent width of 100 m has been excavated by the open pit method up to a depth of 100 m at a pit slope angle of 45°. The figure shows the cross section of the open pit. If the ore body is further excavated by a depth of 10 m, maintaining the same pit slope angle, the ratio of waste rock to ore is
For single ended shearer the maximum seam thickness is suitable is . . . . . . . . m.
The ratio of aggregate cross sectional area of the wires to the area of a circle drawn around the rope.
The uniaxial compressive strength of a limestone sample is 80 MPa. The sample is confined at a pressure of 20 MPa in a triaxial compressive strength test. Based on Hoek-Brown failure criteria the maximum principal stress at failure in MPa is (Consider rock constants as m = 7.88, s = 1.0 and a = 0.5)
Most of the hydraulic props for use in mines do not incorporate the following devices.