By William G. Pariseau
""... sufficiently extensive and deep in its assurance of rock mechanics suggestions utilized to mine layout to deserve a spot at the bookshelf of each mining geotechnical engineer, and within the library at each mine site.""
From: IJRMMS forty four (2007), 1172 - 1176
""... sufficiently huge and deep in its insurance of rock mechanics innovations utilized to mine layout to deserve a spot at the bookshelf of each mining geotechnical engineer, and within the library at each mine site.""
From: IJRMMS forty four (2007), 1172 - 1176
Read Online or Download Design Analysis in Rock Mechanics, Second Edition PDF
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Additional info for Design Analysis in Rock Mechanics, Second Edition
A special case occurs when one assumes that intact rock and joint friction angles are equal and joint cohesion is negligible. This case leads to the well-known Terzaghi model of jointed rock mass strength where φ = φr = φj and c = (1 − p)cr = (Ar /A)cr . The range of rock mass friction angles is relatively large; as a rough guide 25◦ < φ < 55◦ . Cohesion estimates are more difficult because of the dependency on intact rock cohesion and joint persistence. 3 Planar block slide volumes and forces: (a) volumes, (b) weight, (c) seismic–dynamic force, (d) surcharge force, (e) bolt forces, and (f) water forces.
3. The normal components of water forces are uplift forces that act in the negative normal direction and 32 Slope stability reduce the normal force transmitted across the failure surface. Again, the net normal force transmitted is the effective normal force and is simply the reaction N . 10) In principle, the effective normal force could be negative in the presence of sufficient uplift force from water and possibly from seismic or dynamic loading. If N is negative, then frictional resistance is zero.
2 is 1,000 psi. Compression is positive, γ is specific weight, h is thickness, E is Young’s modulus, and G is shear modulus. Find the horizontal stress at the bottom of the sandstone and the top of the limestone. 3. 9 MPa. Compression is positive, SG is specific gravity, h is thickness, E is Young’s modulus, and G is shear modulus. Find the horizontal stress at the bottom of the sandstone and the top of the limestone. 1 psi per ft of depth). Estimate the portions of horizontal stress associated with weight alone and with other forces.