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Because rock mass response to loading is influenced by fracture properties, Bowie <br />dedicated significant resources for logging structure and collecting supplementary data <br />for determining as much quantitative data as possible concerning the following ten <br />fracture parameters: <br />1. Orientation <br />2. Number of sets <br />3. Spacing <br />4. Persistence <br />5. Roughness <br />6. Wall strength <br />7. Aperture <br />8. Filling <br />9. Seepage <br />10. Block size <br />L-1 <br />These ten fracture properties are routinely used in geomechanics for classifying rock <br />mass quality and thus were examined along geotechnical coreholes. Results were used to <br />calculate other important rock mass indices, including the Rock Quality Designation <br />(RQD). RQD is the sum of all core pieces greater than four inches, divided by the total <br />interval length. Like core recovery, RQD was calculated on a per-run basis for each <br />drilling interval. <br />BRL obtained the following geophysical logs. These measurements were completed <br />using the ISRM procedures: <br />• Electrical resistivity <br />• Radiation logs including both gamma ray and gamma-gamma density <br />• Miscellaneous logs including caliper and temperature. <br />• Sonic properties <br />so <br />Maleki Technologies, Inc. Page 7