Relevant bibliographies by topics / Rock Fracture

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Rock Fracture'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Rock Fracture"

1

Schoenberg, Michael, and Colin M. Sayers. "Seismic anisotropy of fractured rock." GEOPHYSICS 60, no. 1 (January 1995): 204–11. http://dx.doi.org/10.1190/1.1443748.

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A simple method for including the effects of geologically realistic fractures on the seismic propagation through fractured rocks can be obtained by writing the effective compliance tensor of the fractured rock as the sum of the compliance tensor of the unfractured background rock and the compliance tensors for each set of parallel fractures or aligned fractures. The compliance tensor of each fracture set is derivable from a second rank fracture compliance tensor. For a rotationally symmetric set of fractures, the fracture compliance tensor depends on only two fracture compliances, one controlling fracture compliance normal, the other, tangential, to the plane of the fractures. The stiffness tensor, which is more useful in the consideration of elastic wave propagation through rocks, can then be obtained by inversion. The components of the excess fracture compliance tensor represent the maximum amount of information that can be obtained from seismic data. If the background rock is isotropic and the normal and shear compliance of each fracture are equal, although different from those of other fractures, the effective elastic behavior of the fractured rock is orthorhombic for any orientation distribution of fractures. A comparison of the theory with recent ultrasonic experiments on a simulated fractured medium shows near equality of the normal and shear compliance for the case of air‐filled fractures.
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Roshankhah, Shahrzad, Arman K. Nejad, Orlando Teran, and Kami Mohammadi. "Modelling the variation in the behaviour of pre-fractured rocks subjected to hydraulic fracturing with permeability of the rock matrix using finite-discrete element method." E3S Web of Conferences 205 (2020): 08001. http://dx.doi.org/10.1051/e3sconf/202020508001.

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In this study, we present the results of two-dimensional numerical simulations for the effects of rock matrix permeability on the behaviour of hydraulic fractures in intact and pre-fractured rocks. The simulations are performed using the Finite-Discrete Element Method (FDEM). In this method, the deformation and fluid pressure fields within the porous rock blocks, pre-existing fracture network, and hydraulically induced fractures are calculated through a fully coupled hydromechanical scheme. Furthermore, new fractures can initiate in crack elements located between each pair of finite elements and can propagate in any path that the boundary and loading conditions require according to non-linear fracture mechanics criteria. Fluid channels are also defined between pairs of finite elements simulating the inter-connected flow paths through porous media. Four models of the rock mass are created in this study: (i) homogeneous-impermeable, (ii) homogeneous-permeable, (iii) heterogeneous-impermeable matrix, and (iv) heterogeneous-permeable matrix. Heterogeneous rock masses contain a discrete fracture network (natural fractures) in the rock mass structure. Hydraulic fracturing is modelled in domains of 40×40 m2 with the four different structures and mass transport capacities, and the results are compared to each other. The results highlight the significant effect of diffusive fluid flow through rock blocks, in addition to the flow through fracture network, on the global hydromechanical behaviour of the rock mass. These results help to understand the governing hydromechanical processes taking place in fractured rocks with matrix of different permeability, such as granites, shales, carbonate rocks, and sandstones and the extent of complexities required to model their behaviour to achieve reasonable accuracy.
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Wang, E. Z., Z. Q. Yue, L. G. Tham, Y. Tsui, and H. T. Wang. "A dual fracture model to simulate large-scale flow through fractured rocks." Canadian Geotechnical Journal 39, no. 6 (December 1, 2002): 1302–12. http://dx.doi.org/10.1139/t02-068.

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Discrete fracture network models can be used to study groundwater flow in fractured rock masses. However, one may find that it is not easy to apply such models to practical projects as it is difficult to investigate every fracture and measure its hydraulic parameters. To overcome such difficulties, a dual fracture model is proposed. Taking into account the hydraulic characteristics of the various elements of the fracture system, a hydrogeological medium is assumed to consist of two components: the dominant fracture network and the fractured rock matrix. As the dominant fracture network consists of large fractures and faults, it controls the groundwater flow in rock masses. Depending on the permeabilities of the in-fill materials, these fractures and faults may serve as channels or barriers of the flow. The fractured rock matrix, which includes rock blocks and numerous small fractures, plays a secondary role in groundwater flow in such medium. Although the small fractures and rock blocks possess low permeability, their numbers and their total porosity are relatively large. Therefore, they provide large volume for groundwater storage. In this paper, the application of the proposed model to simulate the groundwater flow for a hydropower station before and after reservoir storage is reported. The implications of the results on the design of the station are also highlighted.Key words: seepage flow, dual fracture model, dominant fracture, fractured rock matrix, case studies, rock-filled dam.
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LV, WEIFENG, GUOLIANG YAN, YONGDONG LIU, XUEFENG LIU, DONGXING DU, and RONG WANG. "EFFECT OF FRACTAL FRACTURES ON PERMEABILITY IN THREE-DIMENSIONAL DIGITAL ROCKS." Fractals 27, no. 01 (February 2019): 1940015. http://dx.doi.org/10.1142/s0218348x19400152.

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The fracture has great impact on the flow behavior in fractured reservoirs. Fracture traces are usually self-similar and scale-independent, which makes the fractal theory become a powerful tool to characterize fracture. To obtain three-dimensional (3D) digital rocks reflecting the properties of fractured reservoirs, we first generate discrete fracture networks by stochastic modeling based on the fractal theory. These fracture networks are then added to the existing digital rocks of rock matrixes. We combine two low-permeable cores as rock matrixes with a group of discrete fracture networks with fractal characteristics. Various types of fractured digital rocks are obtained by adjusting different fracture parameters. Pore network models are extracted from the 3D fractured digital rock. Then the permeability is predicted by Darcy law to investigate the impacts of fracture properties to the absolute permeability. The permeability of fractured rock is subject to exponential increases with fracture aperture. The relationship between the permeability and the fractal dimension of fracture centers is exponential, as well as the relationship between permeability and the fractal dimension of fracture lengths.
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Xu, Chaoshui, Shaoqun Dong, Hang Wang, Zhihe Wang, Feng Xiong, Qinghui Jiang, Lianbo Zeng, Leon Faulkner, Zhao Feng Tian, and Peter Dowd. "Modelling of Coupled Hydro-Thermo-Chemical Fluid Flow through Rock Fracture Networks and Its Applications." Geosciences 11, no. 4 (March 29, 2021): 153. http://dx.doi.org/10.3390/geosciences11040153.

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Most rock masses contain natural fractures. In many engineering applications, a detailed understanding of the characteristics of fluid flow through a fractured rock mass is critically important for design, performance analysis, and uncertainty/risk assessment. In this context, rock fractures and fracture networks play a decisive role in conducting fluid through the rock mass as the permeability of fractures is in general orders of magnitudes greater than that of intact rock matrices, particularly in hard rock settings. This paper reviews the modelling methods developed over the past four decades for the generation of representative fracture networks in rock masses. It then reviews some of the authors’ recent developments in numerical modelling and experimental studies of linear and non-linear fluid flow through fractures and fracture networks, including challenging issues such as fracture wall roughness, aperture variations, flow tortuosity, fracture intersection geometry, fracture connectivity, and inertia effects at high Reynolds numbers. Finally, it provides a brief review of two applications of methods developed by the authors: the Habanero coupled hydro-thermal heat extraction model for fractured reservoirs and the Kapunda in-situ recovery of copper minerals from fractures, which is based on a coupled hydro-chemical model.
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Han, Tongcheng, and Sam Yang. "Dielectric properties of fractured carbonate rocks from finite-difference modeling." GEOPHYSICS 84, no. 1 (January 1, 2019): MR37—MR44. http://dx.doi.org/10.1190/geo2018-0003.1.

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Fractures are common features in virtually all types of geologic rocks and tend to dominate their mechanical and hydraulic properties. Detection and characterization of fractures in rocks are of interest to a variety of geophysical applications. We have investigated the frequency-dependent dielectric properties of fractured porous carbonate rocks in the frequency range [Formula: see text] and their relationships with different types of fluids filling the fractures, fracture connectivity, and directions of electrical field applied to the rocks using numerical simulation methods based on a 3D finite-difference model. We tested the validity of the modeling method on a spherical-shell model with the theoretical analytical solutions. The two fractures in the two digital carbonate rocks have the same length, but in one rock, they intersect and in the other sample they do not. The fractures in the brine-saturated digital rocks are filled either with oil or with the same brine as in the background rock. We found that although conductivity and relative permittivity are sensitive to the fracture-filling fluids, the dielectric loss factor is the best parameter discriminating the fluids. When filled with brine, the fracture connectivity does not affect the dielectric properties of the rocks. When filled with oil, the fracture connectivity can only be detected if the electrical field is parallel to the longer fracture orientation. The results provide new insights into the frequency-dependent dielectric responses of fractured sedimentary rocks and will help with the interpretation of the dielectric data acquired from rocks with fractures.
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Pan, Bin, and Yang Song Zhang. "Searching for the Shortest Seepage Path of 3D Network in Fractured Rock Masses." Applied Mechanics and Materials 580-583 (July 2014): 857–61. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.857.

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Fractured rock is a combination of rocks and fractures,the fractures which are ubiquitously distributed in fractured rock mass often constitute the flow and migration path of underground fluid and radionuclide.Discrete Fracture Network Model (DFN) was built with in-situ observations to evaluate the hydraulic conductivity tensor of rock masses.The fractures relation pattern with corresponding algorithm is given on the basis of computational geometric,and then the graph theory is employed as the mathematical model to represent the mutual positional relation of fractures.And then,with the use of Dijkstra algorithm, the hydraulic conductivity tensor could be obtained.
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Jiang, Lu, and Yang Song Zhang. "The Research on Mean Spacing of Rock Fracture." Applied Mechanics and Materials 580-583 (July 2014): 219–23. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.219.

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The mean spacing of rock fracture is a very important parameter base to evaluate rock mass,a number of rock studies base on it. Object of this paper is Beishan preselected area in Gansu Province, China. A uthor use GPS-RTK to measure the fracture’s endpoints and inflection, then process the resulting coordinate, building a three-dimensional model of rock fracture by using three-dimensional software and meshing the three-dimensional model, Through the analysis of fractures in each grid to calculate the linear density of rock fracture, after the orientation and inclination correction on linear density, it can be converted to an mean spacing of rock fractures. The mean spacing of rock fracture can be directly used for rock mass classification in GSI rock systems, and has a great significance in rock engineering studies.
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Sicking, Charles, and Peter Malin. "Fracture Seismic: Mapping Subsurface Connectivity." Geosciences 9, no. 12 (December 6, 2019): 508. http://dx.doi.org/10.3390/geosciences9120508.

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Fracture seismic is the method for recording and analyzing passive seismic data for mapping the fractures in the subsurface. Fracture seismic is able to map the fractures because of two types of mechanical actions in the fractures. First, in cohesive rock, fractures can emit short duration energy pulses when growing at their tips through opening and shearing. The industrial practice of recording and analyzing these short duration events is commonly called micro-seismic. Second, coupled rock–fracture–fluid interactions take place during earth deformations and this generates signals unique to the fracture’s physical characteristics. This signal appears as harmonic resonance of the entire, fluid-filled fracture. These signals can be initiated by both external and internal changes in local pressure, e.g., a passing seismic wave, tectonic deformations, and injection during a hydraulic well treatment. Fracture seismic is used to map the location, spatial extent, and physical characteristics of fractures. The strongest fracture seismic signals come from connected fluid-pathways. Fracture seismic observations recorded before, during, and after hydraulic stimulations show that such treatments primarily open pre-existing fractures and weak zones in the rocks. Time-lapse fracture seismic methods map the flow of fluids in the rocks and reveal how the reservoir connectivity changes over time. We present examples that support these findings and suggest that the fracture seismic method should become an important exploration, reservoir management, production, and civil safety tool for the subsurface energy industry.
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Lyu, XianZhou, Zenghui Zhao, Xiaojie Wang, and Weiming Wang. "Study on the Permeability of Weakly Cemented Sandstones." Geofluids 2019 (January 15, 2019): 1–14. http://dx.doi.org/10.1155/2019/8310128.

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Fractured rocks are a type of complex media that widely exist in various projects including energy, hydraulic, and underground space engineering, whose permeability properties are a hotspot in current rock mechanics domain. Aiming at investigating the seepage characteristics of the fracture surfaces in different rock strata, uniaxial compressive test and permeability test were performed on single-fracture homogenous and heterogeneous rocks. Specifically, rock’s physical and mechanical parameters were measured in uniaxial tests while the initial width of the single fracture was determined through CT scanning. In combination with test results and the calculation model of the displacement of single-fracture heterogeneous rock under triaxial stress condition, the calculation formula of the permeability coefficient of single-fracture heterogeneous rock was derived. Results show that hydraulic pressure in the fracture can affect the permeability coefficient of the fractured rock. Hydraulic fracturing effect occurred with the increase of hydraulic pressure in the fracture, which then generates slight normal deformations of the rock masses on both two sides of the fracture surface, decreases the contact area in the fracture, and leads to the increases of both fracture width and permeability coefficient. For single-fracture rock, the lithological properties of the rock masses on both two sides of the fracture surface impose significant effects on the permeability coefficient. Under same hydraulic pressure and confining pressure, the permeability coefficient of single-fracture coarse sandstone is greatest, followed by that of single-fracture heterogeneous rock, and finally by single-fracture fine sandstone. Theoretical calculation results agree well with the test results, suggesting that the derived theoretical formula can adequately describe the variation tendencies of permeability coefficient with confining pressure and hydraulic pressure in the fracture.
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Dissertations / Theses on the topic "Rock Fracture"

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Lock, Yick-bun. "An examination of failure criteria for some common rocks in Hong Kong /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17665164.

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Felton, David Scott. "Theoretical dissolution coefficient for rock fractures." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/21505.

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Sharpe, Colin James 1962. "Experimental effectiveness of rock fracture grouting." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/291736.

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The objective of this investigation is to experimentally determine the effectiveness of fracture sealing in welded tuff using ordinary portland cement and microfine cement grouts. Fracture grouting will most likely be used to seal fractures intersecting high level nuclear waste repositories. Fractures are potential pathways for the migration of radionuclides. Laboratory experiments have been performed on seventeen tuff cylinders. (1) tension induced cracks, (2) natural and, (3) sawcut surfaces serve as fractures. Prior to grouting, the hydraulic conductivity of the intact rock and that of the fractures themselves are measured under a range of normal stresses. Grouts are injected through axial boreholes at pressures of 0.3 to 4.1 MPa while holding fractures under a constant normal stress. Five grout formulations have been selected. Minor amounts of bentonite (0 to 5 percent by weight) have been added to these grouts to increase stability. Water to cement ratios range from 0.45 to 1.0. Permeameter testing of grouted fractures is used to evaluate the effectiveness of fracture grouting.
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Yu, Xiaomeng. "Stochastic modeling of rock fracture geometry." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12176.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
Includes bibliographical references (second sequence, leaves 1-3).
by Xiaomeng Yu.
M.S.
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Akram, Muhammad. "The effect of zero point charge environment on rock fracture behavior." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08142009-040230/.

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Ran, Chongwei 1956. "Effectiveness of rock fracture sealing with bentonite grouting." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/278016.

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A new fracture grouting technology has been developed to meet the requirements of high-level nuclear waste isolation. Bentonite fracture grouting tests are performed on a fracture model, made of circular acrylic plates with outer diameter of 30 cm and a central injection hole of 2.5 cm diameter. Suspensions with bentonite concentration of 9% to 31% have been injected into fractures with apertures of 9 to 39 microns under injection pressures less than 0.5 MPa. After grouting, the hydraulic conductivities of the fractures are reduced from the 10-1 to the 10-5 cm/s level. When the suspension is thin enough and the fracture is very small, channeling develops in the grouted fractures. Preliminary results indicate that the permeability of a grouted fracture does not increase with time in 125 days. The flow properties of bentonite suspensions, viscosity, shear stress, yield stress and gelation, are investigated. Water flow through ungrouted fractures and movement of water in bentonite grout are studied.
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Ivanova, Violeta Mintcheva. "Three-dimensional stochastic modeling of rock fracture systems." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11810.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
Includes bibliographical references (leaves 143-146).
by Violeta Mintcheva Ivanova.
M.S.
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Xu, Chaoshui. "Fracture mechanics and its application in rock excavation." Thesis, University of Leeds, 1993. http://etheses.whiterose.ac.uk/754/.

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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 testing, relatively large amounts of intact rock core needed for the test and complex specimen preparation for the SR geometry. The cracked chevron notched Brazilian disc (CCNBD) and the cracked straight through Brazilian disc (CSTBD) specimen geometries overcome these problems and they are believed to be ideal geometries for rock fracture investigations. The general case for the cracked Brazilian disc fracture problem is when the specimen is loaded diametrically with the crack inclined at an angle to the loading direction. Different combinations of Mode I and Mode II fracture intensities can be obtained simply by changing this angle and the loading fixture still remains as simple as for a normal Brazilian test. A special superimposition technique is developed to theoretically solve the stress intensity factor (SW) values for the CSTBD fracture problem with the help of dislocation and complex stress function methods. This evaluation can generate accurate SIF results for the problem with any crack length a(a/R) = 0.05-0.95, while the mixed mode SIF solution for a>0.60 has not been reached by previous researchers. The relative theoretical SW solution for the corresponding CCNBD fracture problem (single or mixed fracture modes) is obtained by using Bluhm's slice model proposed for general crack problems. Numerical calibrations for Mode I fracture problems of the CSTBD and the CCNBD specimens have been conducted by using 194 different specimen geometries and the results prove the correctness of the theoretical evaluations. The valid CCNBD geometrical range for a valid rock Mode I fracture toughness test is numerically investigated and then experimentally validated based on 40 different CCNBD geometries by using 42 different rocks. Experimental studies on the minimum specimen size requirement for a valid CCNBD rock Mode I fracture toughness test are also carried out and the approximate critical criteria is given. The great advantages of using the CCNBD specimens for rock fracture toughness measurement have been investigated and the documentation for recommending the CCNBD specimen geometry to the ISRM as the third suggested method for rock Mode I fracture toughness test is presented. The rock Mode I fracture toughness values are then related to rock conventional properties for the purpose of prediction. Rock cutting mechanics is analyzed by probabilistic fracture mechanics and Weibull's distribution model is found to better express the characteristics of rock cutting performance parameters. Some initial predictions for these parameters based on this mode are then presented.
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SAVELY, JAMES PALMER. "PROBABILISTIC ANALYSIS OF FRACTURED ROCK MASSES." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184249.

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Stability analysis of rock masses composed of small, discrete rock blocks that are in-place and interlocked should consider four components of failure: (1) Sliding between blocks. (2) Shearing through rock blocks. (3) Rolling blocks in a shear zone. (4) Crushing of rock blocks. Statistical rock mass description is used to define the characteristics of the rock blocks and the block assemblage. Clastic mechanics is one method of predicting stresses produced by the arrangement of rock blocks and the loading conditions. Failure begins at a point of maximum stress behind the slope. Progression of the failure is assumed if the first block fails because adjacent blocks will become overstressed. The location of the point of maximum stress is determined from the shape and arrangement of the constituent rock blocks. Because strength is mobilized block-by-block rather than instantaneously along a continuous shear surface, sliding between blocks shows less stability than a soil rotational shear analysis or a rigid block sliding analysis. Shearing through rock blocks occurs when maximum shear stress exceeds rock shear strength. Crushing of rock blocks is predicted if the normal stress exceeds the compressive strength of the rock block. A size-strength relationship is combined with the rock block size distribution curve to estimate crushing strength. Rotating blocks in a shear zone have been observed in model studies and as a mechanism in landslides. Stability analysis assumes that the rock mass is sufficiently loosened by blasting and excavation to allow blocks to rotate. The shear strength of rolling blocks is dynamic shear strength that is less than static sliding shear strength. This rolling mechanism can explain release of slope failures where there are no other obvious structural controls. Stability of each component of rock mass failure is calculated separately using capacity-demand reliability. These results are combined as a series-connected system to give the overall stability of the rock mass. This probability of failure for the rock mass system explicitly accounts for the four components of rock mass failure. Criteria for recognizing rock mass failure potential and examples applying the proposed method are presented.
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Zhang, Wenbing. "A method and program for quantitative description of fracture data and fracture data extrapolation from scanline or wellbore data /." May be available electronically:, 2001. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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Books on the topic "Rock Fracture"

1

Chernyshev, S. N. Rock fractures. London: Butterworth-Heinemann, 1991.

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SEM-RILEM International Conference (1987 Houston, Tex.). Fracture of concrete and rock. Edited by Shah S. P, Swartz Stuart E, Society for Experimental Mechanics (U.S.), and RILEM Committee 89-FMT Fracture Mechanics of Concrete, Test Methods. New York: Springer-Verlag, 1989.

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Shah, Surendra P., and Stuart E. Swartz, eds. Fracture of Concrete and Rock. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3578-1.

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4

Rock joints: The mechanical genesis. Berlin: Springer, 2005.

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Sheorey, P. R. Empirical rock failure criteria. Rotterdam: A.A. Balkema, 1997.

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Bhandari, Sushil. Engineering rock blasting operations. Rotterdam, Netherlands: A.A. Balkema, 1997.

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McWilliams, P. C. Estimation of shear strength using fractals as a measure of rock fracture roughness. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1993.

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McWilliams, P. C. Estimation of shear strength using fractals as a measure of rock fracture roughness. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1993.

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Principles of rock fragmentation. New York: Wiley, 1987.

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P, Shah S., Swartz Stuart E, and Barr B, eds. Fracture of concrete and rock: Recent developments. London: Elsevier Applied Science, 1989.

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Book chapters on the topic "Rock Fracture"

1

Zang, Arno, and Ove Stephansson. "Rock Fracture Criteria." In Stress Field of the Earth’s Crust, 37–62. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-1-4020-8444-7_3.

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Murthy, Chivukula S. N. "Mechanics of Indentation Fracture." In Rock Indentation, 51–85. New York: CRC Press, 2021. http://dx.doi.org/10.1201/9780429019951-3.

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Du, J. J., A. S. Kobayashi, and N. M. Hawkins. "Fracture Process Zone of a Concrete Fracture Specimen." In Fracture of Concrete and Rock, 199–204. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3578-1_20.

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Shen, Baotang, Ove Stephansson, and Mikael Rinne. "Introduction to Rock Fracture Mechanics." In Modelling Rock Fracturing Processes, 5–18. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6904-5_2.

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Li, Gen, Chun’an Tang, Zhengzhao Liang, and Lianchong Li. "Coupled Fracture Modelling with RFPA." In Modelling Rock Fracturing Processes, 173–201. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35525-8_8.

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Nasseri, M. H. B., B. S. A. Tatone, G. Grasselli, and R. P. Young. "Fracture Toughness and Fracture Roughness Interrelationship in Thermally treated Westerly Granite." In Rock Physics and Natural Hazards, 801–22. Basel: Birkhäuser Basel, 2009. http://dx.doi.org/10.1007/978-3-0346-0122-1_4.

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Zhang, Zong-Xian. "Rock Fracture and Rock Strength." In Rock Fracture and Blasting, 69–88. Elsevier, 2016. http://dx.doi.org/10.1016/b978-0-12-802688-5.00003-8.

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Zhang, Sheng. "Rock fracture toughness." In Scale-Size and Structural Effects of Rock Materials, 145–258. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-820031-5.00002-3.

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Jeffrey, Rob, Xi Zhang, and Zuorong Chen. "Hydraulic fracture growth in naturally fractured rock." In Porous Rock Fracture Mechanics, 93–116. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-08-100781-5.00005-1.

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"ROCK." In Fracture and Damage in Quasibrittle Structures, 247–64. CRC Press, 1994. http://dx.doi.org/10.1201/9781482271454-9.

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Conference papers on the topic "Rock Fracture"

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Urbancic, T. I., and S. C. Maxwell. "Microseismic Imaging of Fracture Behavior in Naturally Fractured Reservoirs." In SPE/ISRM Rock Mechanics Conference. Society of Petroleum Engineers, 2002. http://dx.doi.org/10.2118/78229-ms.

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Olson, Jon E., Jon Holder, and Peggy Rijken. "Quantifying the Fracture Mechanics Properties of Rock for Fractured Reservoir Characterization." In SPE/ISRM Rock Mechanics Conference. Society of Petroleum Engineers, 2002. http://dx.doi.org/10.2118/78207-ms.

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Jeffrey, Robert G., Andrew Bunger, Brice LeCampion, Xi Zhang, Zuorong Chen, Andre van As, David P. Allison, et al. "Measuring Hydraulic Fracture Growth in Naturally Fractured Rock." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2009. http://dx.doi.org/10.2118/124919-ms.

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Panigrahi, R. K. "Rock Fracture Studies for Hill Rock Slope." In Geo-Shanghai 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413395.015.

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Crandall, Dustin, Goodarz Ahmadi, and Duane H. Smith. "Modeling of Immiscible, Two-Phase Flows in a Natural Rock Fracture." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78138.

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One potential method of geologically sequestering carbon dioxide (CO2) is to inject the gas into brine-filled, subsurface formations. Within these low-permeability rocks, fractures exist that can act as natural fluid conduits. Understanding how a less viscous fluid moves when injected into an initially saturated rock fracture is important for the prediction of CO2 transport within fractured rocks. Our study examined experimentally and numerically the motion of immiscible fluids as they were transported through models of a fracture in Berea sandstone. The natural fracture geometry was initially scanned using micro-computerized tomography (CT) at a fine volume-pixel (voxel) resolution by Karpyn et al. [1]. This CT scanned fracture was converted into a numerical mesh for two-phase flow calculations using the finite-volume solver FLUENT® and the volume-of-fluid method. Additionally, a translucent experimental model was constructed using stereolithography. The numerical model was shown to agree well with experiments for the case of a constant rate injection of air into the initially water-saturated fracture. The invading air moved intermittently, quickly invading large-aperture regions of the fracture. Relative permeability curves were developed to describe the fluid motion. These permeability curves can be used in reservoir-scale discrete fracture models for predictions of fluid motion within fractured geological formations. The numerical model was then changed to better mimic the subsurface conditions at which CO2 will move into brine saturated fractures. The different fluid properties of the modeled subsurface fluids were shown to increase the amount of volume the less-viscous invading gas would occupy while traversing the fracture.
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Li, Weiwei, Christopher Petrovitch, and Laura J. Pyrak‐Nolte. "Interpreting fracture specific stiffness for fractures in anisotropic rock." In SEG Technical Program Expanded Abstracts 2009. Society of Exploration Geophysicists, 2009. http://dx.doi.org/10.1190/1.3255261.

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Gonzalez, M., A. Dahi Taleghani, and J. E. Olson. "A Cohesive Model for Modeling Hydraulic Fractures in Naturally Fractured Formations." In SPE Hydraulic Fracturing Technology Conference. SPE, 2015. http://dx.doi.org/10.2118/spe-173384-ms.

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Abstract A cohesive zone model (CZM) has been developed to couple fluid flow with elastic, plastic and damage behavior of rock during hydraulic fracturing in naturally fractured formations. In addition to inelastic deformations, this model incorporates rock anisotropies. Fracture mechanics of microcrack and micro-void nucleation and their coalescence are incorporated into the formulation of the CZM models to accurately capture different failure modes of rocks. The performance of the developed elastoplastic and CZM models are compared with the available data of a shale play, and then the models are introduced into a commercial finite element package through user-defined subroutines. A workflow to derive the required model parameters for both intact rock and cemented natural fractures is presented through inverse modeling of field data. The hydraulic fractures' growth in the reservoir scale is then simulated, in which the effect of fluid viscosity, natural fracture characteristics and differential stresses on induced fracture network is studied. The simulation results are compared with the available solutions in the literature. The developed CZM model outperforms the traditional fracture mechanics approaches by removing stress singularities at the fracture tips, and simulation of progressive fractures without any essential need for remeshing. This model would provide a robust tool for modeling hydraulic fracture growth using conventional elements of FEA.
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Schemeta, J. E., W. B. Minner, R. G. Hickman, P. A. Johnston, C. A. Wright, and N. Watchi. "Geophysical monitoring during a hydraulic fracture in a fractured reservoir: Tiltmeter and passive seismic results." In Rock Mechanics in Petroleum Engineering. Society of Petroleum Engineers, 1994. http://dx.doi.org/10.2118/28145-ms.

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Crandall, Dustin, Hang Wen, Li Li, and Alexandra Hakala. "Reactive Geochemical Flow Modeling With CT Scanned Rock Fractures." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21579.

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Obtaining quality three-dimensional geometries of fractures in a natural medium, such as rock, is a non-trivial task. This paper describes how several geothermal fractured rocks were scanned using computed tomography (CT), the reconstruction procedure to generate the three-dimensional (3D) geometry of the fractured rock, and the methodology for isolating the fracture from the CT scan. A conversion process to capture the relevant geometric features of the fracture is then discussed. The scanned aperture distribution was then used to simulate the reactive flow and transport processes using a reactive transport code CrunchFlow. The accurate use of CT images in fluid flow models within complex structures allows detailed understanding on how the aperture distribution affects mineral dissolution and fracture property evolution during the EGS process. Our preliminary simulation results show the formation of the preferential flow in zones with larger apertures, which led to higher calcite dissolution rates and even larger aperture size over time in these zones. Because calcite only occupied 10% of the solid phase, its dissolution did not completely open up the aperture because other relatively non-reactive minerals (clay and quartz) remained. The traditional measure of mechanical aperture could not take into account the partial increase in void space in the rock matrix and underestimated the increase in average aperture. The chemical and hydraulic apertures, which explicitly take into account changes in mineral volumes in the rock matrix, relate better to the overall change in the effective permeability of the sample.
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Weixing Wang. "Rock Fracture Network Image Analysis." In 2006 6th World Congress on Intelligent Control and Automation. IEEE, 2006. http://dx.doi.org/10.1109/wcica.2006.1713915.

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Reports on the topic "Rock Fracture"

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Olsson, O., P. Anderson, S. Carlsten, L. Falk, B. Niva, and E. Sandberg. Fracture Characterization in Crystalline Rock By Borehole Radar. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/133657.

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Woffington, Austin. Effect of grain strength distribution on rock fracture. Office of Scientific and Technical Information (OSTI), May 1996. http://dx.doi.org/10.2172/576770.

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Blair, S. C. Analysis of compressive fracture in rock using statistical techniques. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/90212.

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Holloway, A. L. Fracture Mapping in Granite Rock using Ground Probing Radar. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/133651.

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Coakley, K. J. Spatial statistics for predicting flow through a rock fracture. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/5917213.

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Kovscek, A., D. Tretheway, and C. Radke. Foam flow through a transparent rough-walled rock fracture. Office of Scientific and Technical Information (OSTI), July 1995. http://dx.doi.org/10.2172/83839.

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Herbert H.. Einstein, Jay Miller, and Bruno Silva. Experimental and Analytical Research on Fracture Processes in ROck. Office of Scientific and Technical Information (OSTI), February 2009. http://dx.doi.org/10.2172/948451.

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Ahn, J., P. L. Chambre, T. H. Pigford, and W. W. L. Lee. Radionuclide dispersion from multiple patch sources into a rock fracture. Office of Scientific and Technical Information (OSTI), September 1986. http://dx.doi.org/10.2172/5539594.

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Um, Wooyong, and Hun Bok Jung. Results of Laboratory Scale Fracture Tests on Rock/Cement Interfaces. Office of Scientific and Technical Information (OSTI), June 2012. http://dx.doi.org/10.2172/1047420.

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GRONDIN, Yannick, Claudio LOBOS, Pascal TURBERG, Aurèle PARRIAUX, and Reto MEULI. Quantitative analysis of rock fracture roughness with X-ray Computed Tomography. Cogeo@oeaw-giscience, September 2011. http://dx.doi.org/10.5242/iamg.2011.0090.

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