The diameter and depth of blast holes are generally kept constant depending on . . . . . . . . of equipment.
A. Base
B. Size
C. Length
D. Highwall
Answer: Option B
Solution(By Examveda Team)
The diameter and depth of blast holes are generally kept constant depending on the size of equipment. In surface mining operations, the size of the equipment used for drilling blast holes determines the size of the blast holes that can be drilled. The diameter and depth of the blast holes must be sufficient to accommodate the explosive charge and ensure that the blast is effective in breaking up the rock mass.Option A, Base, Option C, Length, and Option D, Highwall, are not directly related to the size of the equipment used for drilling blast holes.
Therefore, the answer to this question is Option B, Size.
Related Questions on Opencast Mining
Which test determines the sensitivity of explosive to shock and impact.
A. Rifle bullet test
B. Gap test
C. Ageing test
D. Water resistance test
The mining method which does not distroy the land for agriculture and residential purposes.
A. Striping
B. Open cast
C. Placer
D. Long wall
The output capacity of a drag line with 23 to 30m3 is million cu.m per year is
A. 0.25 to 0.75
B. 3 to 4.5
C. 1.5 to 1.7
D. None
Join The Discussion