The primary purpose of cut holes for blasting in an underground drivage is to
(A) provide additional free face
(B) have smooth surface after blasting
(C) prevent over-breakage
(D) reduce noise
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Have smooth surface after blasting
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Answer: its for Providing free space
Explanation: cut holes are longer shot holes, fired first to create free space for Easers.
Easers are shot holes placed around the drifts of cut holes.
Trimmers are shot holes placed around easers to give the final shape of drift.
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