... roadway excavation correction waveform waveform construction coincide characteristic Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza (Eds) © 2020 ISRM, ISBN 978-0-367-42284-4 Study of pipe jacking method for roadway excavation in deep...

... at infinity is defined in the x-y coordinate system: The axes in the coordinate system coincide with the principal directions. The radial displacement UR is the sum of displacement U xR and U yR, which are generated corresponding to each principal stress(Jaerger& Cook 1979): where H = R(1 2)/E, E is Young...

.... In their analyses the landslide event didn't coincide with the standard failure mechanisms. In these cases, clearly could be recognized two block types (so called "passive" and "active" block), which formed the failure. The experience, which the author has with the sloughs, took place in high- or lowwalls...

... pressure is well described by a simple two-parameter expression. This expression coincides for small axial pressure with the well known Coulomb-Navier theory but attains a cons- tant value for higher pressures. The shear strength is determined for ten rocks and four ores. Test method. Resume Un precede...

... Upstream Oil & Gas friction coefficient permeability coefficient flow in porous media strength coincide investigation Reservoir Characterization relative strength structural element mechanical property Fluid Dynamics roughness granite massif fissure saturation joint...