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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

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