PC e Mac
E-Kitabı indirdikten hemen sonra tarayıcınızda "Şimdi Oku" aracılığıyla veya ücretsiz Adobe Digital Editions okuma yazılımıyla okuyun.
iOS & Android
Tabletler ve akıllı telefonlar için: ücretsiz tolino okuyucu uygulamamız
EKitabı doğrudan www.topbookshop.com.au mağazasındaki okuyucuya indirin veya ücretsiz Sony READER FOR PC / Mac veya Adobe Digital Editions yazılımıyla aktarın.
Otomatik senkronizasyondan sonra, okuyucuda e-Kitapları açın veya ücretsiz Adobe Digital Editions yazılımını kullanarak tolino cihazınıza manuel olarak aktarın.
KRAULAND et al.: ROCK MASS STRENGTH AND CLASSIFICATION 121 n :E g, .g E g 50 40 $0- 20 10 40 30 20 10 O (a) /ll/1 Mtne StRte m a s CSIR (b) Mine SUtte m & s CSIR Fig. 9. Rock mass strength for case studies in LaisvaU and Llngsele compared with rock mass strength as determined by three classification systems. strength and a better rock mass strength estimation method should be developed. This requires more case histories where the determined/estimated rock mass strength from the criteria/systems can be compared to the measured/determined rock mass strength. Keywords: Hard Rock Mass, Strength, Failure Criterion, Classification, Characterisation
strengths of hard rock masses. Because of the ... been found to work well in practice. ... rock mass, and 0-o~ is the uniaxial compressive strength ... stress terms, to practical design problems it is necessary ... to be consistent, it is... 2.5 Empirical equations for evaluation of the rock mass strength and ... underground excavation stability mainly in hard rock /Barton et al, 1974/. ... The current practice for geological mapping and core logging should be improved for ....
addressing the risks of deep hard rock mining has mostly been conducted under the auspices of the Chamber of Mines Research Organization, the Mine Health and Safety Council, and several collaborative research programs. Research work to mitigate the rockburst risk has focused on three main areas: (i) development of macro-layouts (e.g.
UNIAXIAL COMPRESSIVE STRENGTH C o (x 1000 psi) 0 50 100 150 SPECIMEN LENGTH L (in.) VARIATION OF COMPRESSIVE STRENGTH WITH SIZE C o = 35 x L-0.14 In this plot of the size effect on strength, a power function was used to best-fit the experimental data. NOTE, however, that beyond L=36 in. the size effect ceases to be of much consequence. Shear strength of rock, rock joints and rock masses – Problems and some solutions ; Rock mass characterization by means of advanced survey methods ; Representation of rock discontinuities in safety analysis of large dams ; Foundations on rock masses The impact of brittle behaviour of rocks on tunnel excavation design
UNIAXIAL COMPRESSIVE STRENGTH C o (x 1000 psi) 0 50 100 150 SPECIMEN LENGTH L (in.) VARIATION OF COMPRESSIVE STRENGTH WITH SIZE C o = 35 x L-0.14 In this plot of the size effect on strength, a power function was used to best-fit the experimental data. NOTE, however, that beyond L=36 in. the size effect ceases to be of much consequence.