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Showing: 1 to 10 of 492 matches for "NX core size"  Page   1   2   3   4   5   6   7   8   9  next
TITLE Rock index properties for geoengineering in underground development 
SUMMARY ... 1975) recommended that the standard reporting size be NX (54 mm-diam or 2 in.-diam),
because it is the internationally recommended core size for site investi ...
AUTHOR O'Rourke, J. E.
PUBLISHED 1990
TITLE Brecciated Manganese Deposits In Johnson County, Tenn. ? Introduction And Summary 
SUMMARY ... 30 a E. Dip 45 a Dept 215.8 reet Core Size or recovered, From- To- Feet bit reet
Description 0 50.0 50.0 4-7/8 inches 0 Red clay. 50.0 143.8 93.8 NX 35.1 Red ...
AUTHOR Hickman, R. C.
PUBLISHED 1956
TITLE Diamond-Bit Performance In Schist ? Summary 
SUMMARY ... Current price, .50 per carat. Table 2 shows the numerical distribution of bits quality
and bit size ranges. Core Number ... gO 15 NX AA 90+ 14 -90 7 to diamond ...
AUTHOR Hausen, Donald M.
PUBLISHED 1956
TITLE A Fragmentation Experiment For In Situ Extraction 
SUMMARY ... detailed mapping of surface fractures, fragment-size distribution measurements of
broken rock on the surface, and drilling of six NX diameter core holes into ...
AUTHOR D’Andrea, Dennis V. ; Dick, Richard A. ; Steckley, Robert C. ; Larson, William C.
PUBLISHED 1974
TITLE Cebolla Creek Titaniferous Iron Deposits, Gunnison County, Colo. ? Introduction And Summary 
SUMMARY ... a separate report. A total of 1)868.5 feet of NX-size hole) core size 2-1/8- inch
diameter, was drilld; core recovery averaged 99.3 percent. 1/ 2/ 3/ ...
AUTHOR Rose, Charles K.
PUBLISHED 1960
TITLE Bore Core Evaluation For Coal Mine Design 
SUMMARY ... rocks. The most common size drilled is NX (or variations of this size) producing
a core approximately SOmm in diameter. Larger cores ...
PUBLISHED 1977
TITLE Investigation Of Eagle Silver Lead-Zinc Mine Toole County, Utah 
SUMMARY ... Sludge and core samples from mineralized sections were analyzed in the Salt Lake
City laboratories. ... 71 core, and 11 chip samples was submitted for analysis. ...
AUTHOR Young W. A.
PUBLISHED 1950
TITLE Some Desirable Improvements In Core Barrels 
SUMMARY ... of the smaller diameters such as EX, AX, BX, and NX causes considerable ... core. ... casing
and pipe sizes should have considerable influence on the size of core ...
AUTHOR Roberts, George D.
PUBLISHED 1947
TITLE Integrated Coal Pillar Strength Formula 
SUMMARY ... where: C is the compressive strength of the specimen/pillar having a diameter of
Dw C, is the strength of 5 cm (2 in) long, NX core size, D, = 5 cm (2 in.). ...
AUTHOR Khair, A.W.
PUBLISHED 1994
TITLE Estimating the Cohesive Strength of Randomly Jointed Rock Masses 
SUMMARY ... turing along various pit sections. The strength of intact NX-size core
was evaluated in two ways. First, a simple hammer test was ...
AUTHOR Stimpson, Brian ; Ross-Brown, Dermot Macaragh
PUBLISHED 1980
Showing: 1 to 10 of 492 matches for "NX core size"  Page   1   2   3   4   5   6   7   8   9  next

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