2008-04-15_REVISION - M1980244 ‎(193)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 4/15/2008
• Doc Name: VOL IV APP 5 Attachment 1 Cresson Mine Slope Design
• From: CC & V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

i
• Main CressonStopeEvaluation AdrianBrown
3.2.3 Summary of intact strength testing
The results of the two intact rock testing programs are summarized in Table 3 below, using those tests
from the above two sections which evaluate the unconfined compressive strength of intact rock.
Table 3. Intact Rock Strength Test Results
•
C7
HOLE DEPTH MATERIAL METHOD UCS
CC93-63 330 Tbx1L Point Load 20,000
CC93-63 331 Tbx1L Point Load 25,000
CC93-63 331 Tbx1L Compression 14,384
CC93-63 482 Tbx1L Point Load 25,000
CC93-63 482 Tbx1L Compression 15,024
CC93-63 483 Tbx1L Point Load 27,000
CC93-64 566 Tbx1L Point Load 13,000
CC93-64 633 Tbx1L Point Load 22,000
CC93-65 225 Tbx1L Point Load 13,000
CC93-65 379 Tbx1L Point Load 18,000
CC93-65 380 Tbx1L Point Load 15,000
CC93-65 380 Tbx1L Compression 11,538
CC93-64 238 Tphd Point Load 16,000
CC93-64 239 Tphd Compression 28,294
CC93-64 239 Tphd Point Load 7,000
CC93-63 181 TphK Point Load 21,000
CC93-63 182 TphK Compression 11,300
CC93-63 217 TphK Point Load 12,000
CC93-63 218 TphK Point Load 23,000
CC93-63 266 TphK Compression 11,698
CC93-63 275 TphK Point Load 16,000
CC93-63 276 TphK Point Load 6,000
CC93-63 307 TphK Point Load 19,000
CC93-64 390 TphK Point Load 22,000
CC93-64 391 TphK Point Load 23,000
CC93-64 607 TphK Point Load 21,000
CC93-64 608 TphK Point Load 13,000
No. Tests 27
Mean psi All Both 17,379
Standard Dev psi All Both 5,951
SD of mean' psi All Both 1,167
The standard deviation of the mean is also known as the standard error of the mean
7 385D.98067 2 6