Results 211 to 220 of about 4,261 (263)
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LABORATORY INSTALLATION SIMULATING A HYDRAULIC FRACTURING OF FRACTURED ROCK MASS
Journal of Mining Science, 2020The article presents the manufacturing procedure and the test results for a synthetic layered and jointed medium with a preset internal structure and the pronounced anisotropy of properties. The laboratory installation for hydraulic fracturing of large-size cubic models under independent triaxial loading, the laboratory installation hydraulics and the ...
S. V. Serdyukov +4 more
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Influence of fracture deformation on grout penetrability in fractured rock masses
Tunnelling and Underground Space Technology, 2020Abstract Fracture deformation during grouting is a hydro-mechanical coupled dynamic process. Some studies indicated that an increase in grouting pressure can accelerate the grouting process, while some other investigations concluded that a high grouting pressure would weaken the grouting effect for fine fractures due to fracture deformation.
Xiao, Fei, Zhao, Zhiye
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Modelling Fracture Propagation in Anisotropic Rock Mass
Rock Mechanics and Rock Engineering, 2014Anisotropic rock mass is often encountered in rock engineering, and cannot be simplified as an isotropic problem in numerical models. A good understanding of rock fracturing processes and the ability to predict fracture initiation and propagation in anisotropic rock masses are required for many rock engineering problems.
Baotang Shen, Topias Siren, Mikael Rinne
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Statistical analysis of rock mass fracturing
Journal of the International Association for Mathematical Geology, 1983Over the past 10 years considerable empirical work has been reported on the stochastic description of rock mass fracturing, and on the statistical design of joint surveys. This has led to consistent conclusions on the distributional properties of such discontinuities, and is beginning to lead to improved survey designs. Two of the strongest conclusions
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Numerical study of fracture openings by tunnelling in fractured rock mass
2007No abstract ...
Alfonsi, P., Fouché, O., Bourgeois, E.
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Influence of persistence on behaviour of fractured rock masses
Geological Society, London, Special Publications, 2007Abstract Most of the models that simulate fractured rock masses assume fully persistent discontinuities, simplifying the fact that, in nature, fractured rock masses are made of non-continuous sets of joints. A rock bridge gives an effective cohesion to the fracture and a block of rock cannot fall or slide until all the rock bridges fail. This
B. H. Kim, P. K. Kaiser, G. Grasselli
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Variational Problem of Unloading Fractured Rock Mass
Advanced Materials Research, 2011This article mainly introduced variational problem about stress-strain relationship of unloading fractured rock mass in the excavation. In this paper, research is carried out on variational principle of unloading fractured rock mass in the stage of linear elasticity.
Li Yu, Ming Fu Fu, Bin Tu
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Poromechanical response of fractured-porous rock masses
Journal of Petroleum Science and Engineering, 1995An analytical model based on a poromechanical formulation for dual-porosity media is presented. In comparison with traditional conceptualizations such as by Barenblatt et al. (1960), the proposed model contains both additional terms in the governing flow equations to provide a physically more realistic description of the change in storage, and a ...
Mao Bai +2 more
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Constitutive Models of Rock Fractures and Rock Masses – The Basics
2007Publisher Summary This chapter presents the fundamental aspects of mathematical theories relating to the mechanical behavior of rock fractures and rock masses, including the most commonly encountered criteria for shear strength and constitutive models for rock fractures, and constitutive models for rock masses based on the theory of elasticity ...
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Modelling storage behaviour in a fractured rock mass
Journal of Hydrology, 1994Abstract A transient model was used to represent single borehole injection tests in fractured rock masses, on the basis of a three-dimensional stochastic description of the fracture network and of the mechanical behaviour of the fractures. The rock matrix remains impervious and storage occurs in the fractures, with a nonlinear compliance effect ...
D. Bruel +3 more
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