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C0NSTRUCTI0N 0F THE CAVITIES
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access drift angle of friction approximately ATTN bedding plane behavior boreholes cavity height cavity surface centers construction cracking crown curved surface Deep refraction velocity deformation modulus depth discontinuous movements dome of Cavity elastic displacements elastic finite element elastic theory elastic-plastic Engineering excavation extension fractures extensometer face of Cavity feet finite element solution fracture frequency gneiss granite granite cavity grout horizontal stresses in-situ inch intact strength intersected joint system jointed rock laboratory load located loosening machine hall mass quality indices measured mining near-surface rock Nevada Test Site observed overbreak parallel plane face Poisson's ratio portion predicted pressure principal stress quartz monzonite R0CK rock bolts rock fracturing rock mass quality Rock Mechanics rock movement rock surface rockbursts seismic Seismic refraction shallow shear side walls slabs stability stope strain tension tests tuff tuff cavities Tumut tunnel U. S. Army unconfined compression underground openings vertical stress yielded zone Young's modulus