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Fracture and flow of rocks under stress and their geophysical and seismological implications raise fundamental questions in rock mechanics, particularly in the areas of tectonophysics and seismology. This text exclusively addresses the deformation and fracture of rock specimens under general triaxial compression, in which all three principal stresses are different; which significantly affects the ultimate strength of rocks. It moreover deals with deformation and failure folloiwng intermediate principal stress in graphic and numerical form. The effect of the intrinsic features of rock masses of inhomogeneous or anisotropic structure are taken into account, as are acoustic emission phenomena in rocks under various stress states. Friction in rocks, measured by a newly-designed shear-testing machine, is discussed in relation to earthquake phenomena.
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Modern Trends in Tunnelling and Blast Design by J. Johansen
A review of modern blasting techniques used in tunnelling, chamber excavations and lake-tap blasting. The scope of this book includes geological implications, cut design and smooth blasting techniques in addition to chamber blasting. This book also includes detailed examples outlining the design issues and techniques used in blasting lake-tap plugs for hydroelectric projects. It is designed as a reference book and companion to courses in tunnel blasting techniques.
Paperback: 154 pages
Publisher: A. A. Balkema; 1 edition (January 1, 2000)
Language: English
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This practical guide describes the stage-by-stage development of a method for predicting the penetration rate (PR) and the advance rate (AR) for tunnel boring machines based on an expanded version of the Q-value, QTBM. The author analyzes 145 TBM tunnels that total 1,000km in length. He then develops simple formulae to estimate PR and AR from the QTBM value and to back-calculate QTBM from performance data. The book quantitatively explains actual advance rates as high as five m/hr for one day or as low as 0.005 m/hr for several months. It also covers logging methods, empirical TBM tunnel support design, and numerical verification of support.
Hardcover: 184 pages
Publisher: Taylor & Francis; 1 edition (January 1, 2000)
Language: English
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hello , i am really confused with the design parameters in sap 14.1
does anyone have a manual showing the definition of each parameter
thanks in advance
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National University of Singapore-Workshop-August 2003
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