51. In the form of a square pyramid blasted material of 7368 m3 by volume is accommodated. The height of the pyramid is 2.4 m. Calculate surface area in m2
52. It is the mining method in which masses, panels or blocks of ore are under cut to induce caving, permetting the broken ore to be drawn off below.
53. An arrangement that prevents oversized rock to pass.
54. The method of stoping selected in strong to weak, fairly steep are with weak host rock.
55. The level roadways are dipping at a mild gredient between . . . . . . . .
56. Channel sampling also called . . . . . . . .
57. In cut and fill stope the main purpose of back filling is to . . . . . . . .
58. A small portion of the ore body collected and analysed to estimate the average mineral content of the ore body called . . . . . . . .
59. Stoping is always started on each side of . . . . . . . . direction.
60. Cut and fill stoping can be done by . . . . . . . .
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