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The most widely used definition was developed in 1964 by D. U. Deere. It is the borehole core recovery percentage incorporating only pieces of solid core that are longer than 100 mm in length measured along the centerline of the core. In this respect pieces of core that are not hard and sound should not be counted though they are 100 mm in length.
Continuous functions and a software "QuickRMR" for RMR89 and RMR14 have also been proposed by Kundu. [3] RMR combines the most significant geologic parameters of influence and represents them with one overall comprehensive index of rock mass quality, which is used for the design and construction of excavations in rock, such as tunnels, mines ...
construction parameters: size of tunnel; direction of drive; method of excavation. The RSR value of any tunnel section is obtained by summing the weighted numerical values determined for each parameter. The RSR concept is a very useful method for selecting steel rib support for rock tunnels.
This is a list of free and open-source software for geological data handling and interpretation. The list is split into broad categories, depending on the intended use of the software and its scope of functionality. Notice that 'free and open-source' requires that the source code is available and users are given a free software license.
Nowadays the classification system itself is not very often used, but the determination of the RQD as index for rock core quality is standard practice in any geotechnical rock drilling, and is used in many, more recent, rock mass classification systems, such as RMR and Q-system (see above). Rock Structure Rating (RSR)
Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model.There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.
LGPL (Core) & GPL/LGPL (Non-Core) [1] Free: Linux, Unix, Mac OS X, Windows: FEATool Multiphysics: MATLAB FEM and PDE multiphysics simulation toolbox: Precise Simulation: 1.10: 2019-05-17: Proprietary EULA: Free for personal use [2] Windows, Mac OS X, Linux, Unix: FreeFEM [3] FreeFEM is a free and open-source parallel FEA software for ...
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