Machine-translated by Google. Questions are authored in English.
Top

Discussion

Poor core recovery in a run usually indicates

  • A.unusually strong and massive rock
  • B.an error in surveying the borehole position
  • C.a core barrel of excessive internal diameter
  • D.weak, broken or cavernous ground

Answer: D

Fractured or soft material washes away with the flush or falls from the barrel, so the very ground that matters most is the ground least likely to be recovered. Triple-tube barrels and careful drilling improve matters.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.