Rock Classification Systems for Engineering Purposes

applications B(tg B(utg Barton Bieniawski blasting borehole calcrete Category Class CLASSIFICATION ELEMENTS Classification of Rock clay compressive strength construction core D&B D&B D&B degree of weathering depth determined developed discontinuities drilling engineering geologist Engineering Geology Engineering Purposes estimated evaluation excavatability geologic geologists Geomechanics Classification geotechnical ground support hard rock ISRM joint roughness joint sets Kirsten method mineral mining parameters performance assessment planar separations planes of separation Q-system range rib ratio RMR System rock bolts Rock Classification System rock conditions rock load rock mass classification Rock Mass Rating ROCK MATERIAL PROPERTIES Rock Mechanics Rock Quality Designation Rock Structure Rating rock types rock unit S(mr sections shear zones shotcrete soil spacing stability stress support requirements surface Symposium TABLE tests thick trench Tunnel Boring Machine Tunnel Support U.S. Army unconfined compressive strength Underground Unified Rock Classification unit weight URCS