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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"rock fracture"”.
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Rock fracture under static stress conditions
… structures, an understanding of the mechanics of rock fracture, particularly under compressive stress conditions, is of fundamental importance. This thesis contains details of an investigation into the applicability of Griffith's brittle fracture theory, modified to account for the effects of …
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Stochastic modeling of rock fracture geometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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Assessment of rock fracture initiation using acoustic emission
DSpace SAF Submission Ingestion Package generated from Vireo submission #14339 on 2019-11-26 at 14:04:18
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Three-dimensional stochastic modeling of rock fracture systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
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Quantitative Analysis of Acoustic Emission From Rock Fracture Experiments
… results were applied to two AE data sets from rock fracture experiments in order to characterize the sources of AE events. The first data set was from an in situ rock fracture experiment conducted at the Underground Research Laboratory (URL). The Mine-By experiment was a large scale excavation …
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Geologic stochastic modeling of rock fracture systems related to crustal faults
… of the MIT three-dimensional geologic stochastic fracture model were extended so that fracture systems related to crustal faulting can be simulated. As presented here, the model comprises four stochastic processes: 1) a homogeneous, anisotropic Poisson process to model the orientation of the …
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Numerical and Experimental Study of Rock Fracture Creep Under Dry Conditions
In many rock engineering projects such as hydrocarbon extraction or geothermal energy utilization, the hydro-mechanical behavior of rock fractures has a strong effect on the safety and profitability of the project. In field conditions, the hydraulic and mechanical behavior of rock fractures changes …
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The effect of zero point charge environment on rock fracture behavior
… of zero point of charge (ZPC) environment on fracture behavior of rocks. The material parameters selected for this purpose were fracture toughness and specific work of fracture. These properties were determined for three rock types in five environments. Semi-circular bend specimens of …
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Stochastic analysis of flow and solute transport in a variable-aperture rock fracture
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1984.
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Stereological Interpretation of Rock Fracture Traces on Borehole Walls and Other Cylindrical Surfaces
Fracture systems or networks always control the stability, deformability, fluid and gas storage capacity and permeability, and other mechanical and hydraulic behavior of rock masses. The characterization of fracture systems is of great significance for understanding and analyzing the impact of …
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Modeling rock fracture intersections : application in the Boston Area and estimation of the well-test flow dimension
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Influence of topographic stress on rock fracture : a two-dimensional numerical model for arbitrary surface topography and comparisons with borehole observations
… in some landscapes may be large enough to fracture rocks, which in turn could influence slope stability, erosion rates, and bedrock hydrologic properties. These predictions typically have involved idealized topographic profiles, with few direct comparisons of predicted topographic stresses …
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Modeling joint patterns using combinations of mechanical and probabilistic concepts
Rock fracture pattern description is important in civil engineering, engineering geology, and petroleum engineering. Deformability, strength, and stability of a rock mass as well as fluid flow through it are all influenced by fractures. Rock fracture patterns normally cannot be observed completely …
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Rock Drilling with impregnated diamond microbits
… rig was designed and used to drill a variety of rock types with impregnated diamond microbits. The rocks, selected to represent a wide range of properties, were characterised by optical petrography and by the measurement of uniaxial compressive strength and relative abrasion resistance. A …
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Blasting Design Using Fracture Toughness and Image Analysis of the Bench Face and Muckpile
… blasting fragmentation reduction ratio (RR) and rock fracture toughness (KIC). The reduction ratio was obtained by analyzing the bench face block size distribution and the muck fragment size distribution using image analysis. The fracture toughness was determined using the Edge Notched Disk Wedge …
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Fracture mechanics and its application in rock excavation
The two chevron notched specimen geometries for rock Mode I fracture toughness measurement, CB and SR, recommended by the ISRM have several disadvantages, such as very low loads required to initiate failure, complicated loading fixtures, difficult to be developed for rock mixed mode fracture …
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Application of the 3-D Hydro-Mechanical Model GEOFRAC in enhanced geothermal systems
… hierarchical, stochastic model of natural rock fracture systems. The main characteristic of GEOFRAC is that it is based on statistical input representing fracture patterns in the field in form of the fracture intensity P₃₂ (fracture area per volume) and the best estimate fracture size E[A]. …
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Thermomechanical analysis of rock asperity in fractures of enhanced geothermal systems
… wells. Injected water is heated by contact with rock and returns to the surface through production well. Fracture provides the primary conduit for fluid flow and heat transfer in natural rock. Fracture is propped by fracture roughness with varying heights which is called asperity. The stability …
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Failure and deformation of rocks in compression for underground design
Rock contains discontinuities at all scales. These discontinuities make rock behave in a complex way. This dissertation discusses a new approach to underground design based on the theory of rock fracture mechanics. Due to the important role of coal for energy in the US, coal which is classified as …
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