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2014-01-30_REPORT - M1973021
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2014-01-30_REPORT - M1973021
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Last modified
3/29/2017 12:54:51 PM
Creation date
2/3/2014 11:47:25 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1973021
IBM Index Class Name
Report
Doc Date
1/30/2014
From
Jeremy Deuto
To
DRMS
Annual Report Year
2013
Permit Index Doc Type
Annual Fee/Report
Email Name
PSH
Media Type
D
Archive
No
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3.0 Field Data <br />Rock mass characteristics were documented at locations exposed during 2013 mining <br />operations. Items documented include joint and foliation orientation and dip, highwall trends, <br />and rock mass rating (RMR) classification estimates. In addition, unusual rock features <br />exposed in the highwalls such as shear zones, intrusions, adversely dipping foliation, and <br />areas of potential instability were documented. <br />Dip and orientation data was gathered using a Brunton compass with a 9 degree east <br />magnetic declination and measurements were taken using the right hand rule. Measurements <br />were estimated a safe distance from the highwalls and excavated areas to address safety <br />considerations at the request of Al and GEI personnel. <br />RMR classification is determined from highwall conditions noted with the following <br />parameters and associated point scales (numbers in parentheses): <br />• Estimated Strength of Intact Rock Material <br />• Very High (15 points): >36,260 psi <br />• High (12): 14,500 — 36,260 psi <br />• Medium High (7): 7,250 — 14,500 psi <br />• Moderate (4): 3,625 — 7,250 psi <br />• Low (2): 725 — 3,625 psi <br />• Very Low (1): 145 — 725 psi <br />• Estimated Drill Core Quality (RQD) <br />• Excellent Quality (20 points): 90 — 100% <br />• Good Quality (17): 75 — 90% <br />• Fair Quality (13): 50 — 75% <br />• Poor Quality (8): 25 — 50% <br />• Very Poor Quality (3): <25% <br />• Spacing of Discontinuities <br />• Very Wide (20 points): >6.5 feet <br />• Wide (15): 2 — 6.5 feet <br />• Moderate (10): 8 — 24 inches <br />• Close (8): 2.4 — 8 inches <br />• Very Close (5): <2.4 inches <br />• Groundwater Conditions <br />• Inflow (liters per 10 m) or water pressure <br />• Notes <br />• Discontinuity Persistence <br />GEI Consultants, Inc. 4 January 2014 <br />2013 Morrison Quarry Annual Report <br />
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