Find the Rock Quality Designation of drilled rocks upon coring. Give the remarks on the quality of rock

Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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Find the Rock Quality Designation of drilled rocks upon coring. Give the remarks on the quality of rock. 

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RQD (%)
Description
Very Poor
Poor
...
0-25
25-50
50-75
Fair
75-90
Good
90-100
Excellent
CORE RECOVERY
CALCULATION
RQD
CALCULATION
...
L- 250 mm
L= 250 mm
L=0
Highly Weathered
Does not meet
Soundness Requirement
L= 200 mm
L=0
L= 250 mm
Centerline
Pieces < 100 mm
and Highly Weathered
L= 190 mm
L= 190 mm
L-0
< 100 mm
L-60 mm
L- 80 mm
Mechanical Break
caused by Drng Process
L= 200 mm
L-120 mm
L-O mm
L-0
No Recovery
Core Run Total 1200 mm
Transcribed Image Text:RQD (%) Description Very Poor Poor ... 0-25 25-50 50-75 Fair 75-90 Good 90-100 Excellent CORE RECOVERY CALCULATION RQD CALCULATION ... L- 250 mm L= 250 mm L=0 Highly Weathered Does not meet Soundness Requirement L= 200 mm L=0 L= 250 mm Centerline Pieces < 100 mm and Highly Weathered L= 190 mm L= 190 mm L-0 < 100 mm L-60 mm L- 80 mm Mechanical Break caused by Drng Process L= 200 mm L-120 mm L-O mm L-0 No Recovery Core Run Total 1200 mm
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