Geology
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Classification systems
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Geotechnical engineering
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Rock (geology)
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Tunnel
Rock mass classification
Rock mass classification systems are used for various engineering design and stability analysis. These are based on empirical relations between rock mass parameters and engineering applications, such ...
SMR classification
Slope Mass Rating or SMR is a rock mass classification scheme developed by Romana (1985, 1995) to describe the strength of an individual rock outcrop or slope. The system is founded upon the more wide...
New Austrian Tunnelling method
The New Austrian Tunnelling method (NATM), also known as Sequential Excavation Method (SEM), describes a popular method of modern tunnel design and construction. This technique first gained attention ...
Slope stability probability classification
The slope stability probability classification (SSPC) system is a rock mass classification system for slope engineering and slope stability assessment. The system is a three-step classification: ‘expo...
Size Strength classification
In geology, size strength classification is a two-parameter rock classification based on the strength of intact rock and the spacing of discontinuities in the rock mass. It was developed by Louis and ...
Rock Structure Rating
Rock Structure Rating (RSR) is a quantitative method for describing quality of a rock mass and appropriate ground support, in particular, for steel-rib support, developed by Wickham, Tiedemann and Ski...
Geological Strength Index
The Geological Strength Index (GSI) system, proposed in 1995, is used for the estimation of the rock mass strength and the rock mass deformation modulus. The GSI system concentrates on the description...
Core recovery parameters
Core recovery parameters describe the quality of core recovered from a borehole.
Total core recovery (TCR) is the borehole core recovery percentage.TCR is defined as the quotient:
Persistence (discontinuity)
Persistence determines the possibilities of relative movement along a discontinuity in a soil or rock mass in geotechnical engineering. Discontinuities are usually differentiated in persistent, non-pe...
Persistence (discontinuity) - Wikipedia
Q-system (geotechnical engineering)
The Q-system for rock mass classification is developed by Barton, Lien, and Lunde. It expresses the quality of the rock mass in the so-called Q-value, on which are based design and support recommendat...
Sliding criterion (geotechnical engineering)
The sliding criterion (discontinuity) is a tool to estimate easily the shear strength properties of a discontinuity in a rock mass based on visual and tactile (i.e. by feeling) characterization of the...
Sliding criterion (geotechnical engineering) - Wikipedia
Mining rock mass rating
Laubscher developed the Mining Rock Mass Rating (MRMR) system by modifying the Rock Mass Rating (RMR) system of Bieniawski. In the MRMR system the stability and support are determined with the followi...
Rock mass rating
The Rock Mass Rating (RMR) System is a geomechanical classification system for rocks, developed by Z. T. Bieniawski [1] between 1972 and 1973. It combines the most significant geologic parameters of ...
Rock mass rating - Wikipedia