Introduction To Mining Engineering - Study Mode
[#291] Which of the following credential is required for getting mining block in India?
Correct Answer
(B) 25% financial credential & 75% technical credential
[#292] An opencast mine has four benches. The height, width and face angle for each bench are 13 m, 30 m and 70° respectively. The overall slope angle of the benches in degrees is
Correct Answer
(A) 25.5°
[#293] Maximum permissible gradient for the haul road in opencast mines is
Correct Answer
(C) 14°
[#294] A 2.5 m thick coal seam lying at an average depth of 100 m has been developed by bard and pillar method. The width of the square pillars is 30 m (centre to centre) and the gallery width is 4 m. The average density of the overlying strata is 26 kN/m 3 and the pillar strength is 4500 kN/m 2 . Extraction ratio during the development of the pillar is
Correct Answer
(D) 0.249
[#295] Soutirage mining is the alternative name of
Correct Answer
(B) integral caving