The objective of such activity is to restrict displacements of the country rock to elastic orders of magnitude and to maintain as far as practicable the integrity of both the country rock and the unmined remnants within the ore body. Identify the mining activity?
A. driving of gallery
B. maneuvering the machines
C. drilling of holes in faces
D. supporting the roof
Answer: Option D
This Question Belongs to Mining Engineering >> Rock Mechanics And Roof Supporting
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