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Rotary Drilling for Strippable Coal in the Jarvis Creek Coalfield, Alaska.


PB214938

Publication Date 1973
Personal Author Warfield, R. S.
Page Count 37
Abstract Twelve relatively short holes were drilled using a CSR (center sample return) drilling system to test the applicability of the drilling system and to test coal continuity in the vicinity of the present mine workings of the Jarvis Creek coalfield. Coal intersections plus geologic evidence indicate depositional continuity over fairly large distances. The CSR drilling system offers an excellent method for determining coal continuity and a system in which a fair (but not quite as good as core) sample may be obtained. (Author)
Keywords
  • Coal deposits
  • Rotary drilling
  • Sampling
  • Strip mining
  • Reserves
  • Alaska
  • Center sample return drilling
Source Agency
  • Invalid Source Agency Code
NTIS Subject Category
  • 48A - Mineral Industries
Corporate Authors BUREAU OF Mines, Washington, D.C.
Supplemental Notes Prepared in cooperation with Bureau of Mines, Alaska Field Operation Center, Juneau.
Document Type Technical Report
Title Note Open file rept.
NTIS Issue Number 197307
Rotary Drilling for Strippable Coal in the Jarvis Creek Coalfield, Alaska.
Rotary Drilling for Strippable Coal in the Jarvis Creek Coalfield, Alaska.
PB214938

  • Coal deposits
  • Rotary drilling
  • Sampling
  • Strip mining
  • Reserves
  • Alaska
  • Center sample return drilling
  • Invalid Source Agency Code
  • 48A - Mineral Industries
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