Download or read book Determination of Mining induced Stresses Using Diametrical Rock Core Deformation Measurement and Finite Element Modelling written by Yizhuo Li and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Knowledge of ground stresses is crucial for ground control activities such as the design of underground openings, selection of support systems, and analysis for stability. There are several mature methods for in-situ stress measurement that are well-documented in the literature. The most popular of these methods are over-coring and hydraulic fracturing techniques. Far field stresses are usually measured far from the mine to capture the pre-mining stress tensor. However, it is a known fact that far field stresses experience changes in orientation and magnitude due to the presence of geological structures and due to the excavations created by mining activities. As a result, mining-induced stresses around drifts, ramps, and stopes in underground mines are quite different from the far field or pre-mining stresses. Therefore, investigating the development of an effective and practical method to estimate mining-induced stresses near a mining face should prove useful in practice. The purpose of this research is to develop a simple and practical methodology for determining mining-induced stresses near underground mine openings such as drifts and crosscuts where the near-field stresses in the sidewalls, the back, and the face could be of concern to the stability of the opening. This study uses exploration rock cores that are drilled off for the purpose of orebody definition at the mine. The method measures and analyzes the diametral core deformations in laboratory. The difficulty with this method is that the original rock core diameter (before strain relief) is unknown. Due to the wear of the diamond drill bit and rock material losses due to drilling, it is not possible to determine the original core diameter from the internal diameter of the diamond drill bit. To overcome this problem, a new methodology has been developed based on combining measured deformations with finite element modelling. The methodology requires knowledge of the elastic properties of the intact rock. Therefore, uniaxial testing constitutes part of the new methodology.A customized test apparatus has been designed and built in the laboratory to enable precise measurements. The apparatus uses a Mitutoyo LSM-512S laser scan micrometer having a tolerance of 0.0001 mm to measure diametrical core rock deformations. The rock sample is placed between a pair of parallel rollers to enable measurements over 360o rotation of the rock core sample. Provisions are made to accommodate a wide range of core diameters ranging from 30.5 mm (AQTK) to 63.4 mm (HQ).Two case studies from operating underground mines are presented to validate the proposed methodology. Rock core diametral deformations were measured, and rock samples were prepared and tested for Young's modulus of Elasticity and Poisson's ratio. Tests were conducted in accordance with ASTM D7012. The differential stress, namely the difference between the principal stresses in the plane perpendicular the core rock axis is calculated using the developed methodology. It is shown that if the rock cores are extracted near the mining face, it would be possible to estimate the mining-induced principal stresses, which are of primary interest to the ground control specialist. It is shown that NQ sample size (47.6 mm) provides more reliable results than the AQTK size (30.5 mm)"--
Download or read book In Situ Determination of Rock Behavior by Overcore Stress Relief Method written by Eugene H. Skinner and published by . This book was released on 1974 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Analysis of Rock Using a Finite Element Method written by Jerry S. Dodd and published by . This book was released on 1967 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salt Rock Deformations Caused by Mining Activity written by Maciej Bazanowski and published by . This book was released on 2016 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Determination of Rock Behavior by Overcore Stress Relief Method written by Ann G. Kim and published by . This book was released on 1974 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Rock Slopes Using the Finite Element Method written by Y. S. Yu and published by Information Canada. This book was released on 1970 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1989 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Mechanics written by Barry H.G. Brady and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition has been completely revised to reflect the notable innovations in mining engineering and the remarkable developments in the science of rock mechanics and the practice of rock angineering taht have taken place over the last two decades. Although "Rock Mechanics for Underground Mining" addresses many of the rock mechanics issues that arise in underground mining engineering, it is not a text exclusively for mining applications. Based on extensive professional research and teaching experience, this book will provide an authoratative and comprehensive text for final year undergraduates and commencing postgraduate stydents. For profesional practitioners, not only will it be of interests to mining and geological engineers, but also to civil engineers, structural mining geologists and geophysicists as a standard work for professional reference purposes.
Download or read book Determination of Stress in Rock written by Leonard Obert and published by . This book was released on 1967 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Combined Finite Discrete Element Method written by Antonio A. Munjiza and published by John Wiley & Sons. This book was released on 2004-04-21 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The combined finite discrete element method is a relatively new computational tool aimed at problems involving static and / or dynamic behaviour of systems involving a large number of solid deformable bodies. Such problems include fragmentation using explosives (e.g rock blasting), impacts, demolition (collapsing buildings), blast loads, digging and loading processes, and powder technology. The combined finite-discrete element method - a natural extension of both discrete and finite element methods - allows researchers to model problems involving the deformability of either one solid body, a large number of bodies, or a solid body which fragments (e.g. in rock blasting applications a more or less intact rock mass is transformed into a pile of solid rock fragments of different sizes, which interact with each other). The topic is gaining in importance, and is at the forefront of some of the current efforts in computational modeling of the failure of solids. * Accompanying source codes plus input and output files available on the Internet * Important applications such as mining engineering, rock blasting and petroleum engineering * Includes practical examples of applications areas Essential reading for postgraduates, researchers and software engineers working in mechanical engineering.
Download or read book McGraw Hill Yearbook of Science and Technology written by and published by . This book was released on 1988 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Geology for Underground Rocks written by Suping Peng and published by Springer Science & Business Media. This book was released on 2007-10-14 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Professionals and students in any geology-related field will find this an essential reference. It clearly and systematically explains underground engineering geology principles, methods, theories and case studies. The authors lay out engineering problems in underground rock engineering and how to study and solve them. The book specially emphasizes mechanical and hydraulic couplings in rock engineering for wellbore stability, mining near aquifers and other underground structures where inflow is a problem.
Download or read book Rock Foundations written by United States. Army. Corps of Engineers and published by . This book was released on 1994 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Failure Mechanisms written by Chun'An Tang and published by CRC Press. This book was released on 2010-08-06 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: When dealing with rock in civil engineering, mining engineering and other engineering, the process by which the rock fails under load should be understood, so that safe structures can be built on and in the rock. However, there are many ways for loading rock and rock can have a variety of idiosyncracies. This reference book provides engineers and researchers with the essential knowledge for a clear understanding of the process of rock failure under different conditions. It contains an introductory chapter explaining the role of rock failure in engineering projects plus a summary of the theories governing rock failure and an explanation of the computer simulation method. It subsquently deals in detail with explaining, simulating and illustrating rock failure in laboratory and field. The concluding chapter discusses coupled modelling and the anticipated future directions for this type of computer simulation. An appendix describing the RFPA numerical model (Rock Failure Process Analysis program) is also included. About the Authors Chun'an Tang has a PhD in Mining Engineering and is a Professor at the School of Civil & Hydraulic Engineering at Dalian University of Technology in China. He is an advisor for design and stablity problem modelling in mining and civil rock engineeringand and Chairman of the China National Group of the International Society for Rock Mechanics. John Hudson is emeritus professor at Imperial College, London and is active as an independant consultant for Rock Engineering Consultants. He has a PhD in Rock Mechanics and completed over a 130 rock engineering consulting assignments in mining and civil engineering. He is a fellow at the Royal Academy of Engineering in the UK and President of the International Society for Rock Mechanics.
Download or read book Stress Field of the Earth s Crust written by Arno Zang and published by Springer Science & Business Media. This book was released on 2009-12-06 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stress Field of the Earth’s Crust is based on lecture notes prepared for a course offered to graduate students in the Earth sciences and engineering at University of Potsdam. In my opinion, it will undoubtedly also become a standard reference book on the desk of most scientists working with rocks, such as geophysicists, structural geologists, rock mechanics experts, as well as geotechnical and petroleum en- neers. That is because this book is concerned with what is probably the most pe- liar characteristic of rock – its initial stress condition. Rock is always under a natural state of stress, primarily a result of the gravitational and tectonic forces to which it is subjected. Crustal stresses can vary regionally and locally and can reach in places considerable magnitudes, leading to natural or man-made mechanical failure. P- existing stress distinguishes rock from most other materials and is at the core of the discipline of “Rock Mechanics”, which has been developed over the last century. Knowledge of rock stress is fundamental to understanding faulting mechanisms and earthquake triggering, to designing stable underground caverns and prod- tive oil fields, and to improving mining methods and geothermal energy extraction, among others. Several books have been written on the subject, but none has atte- ted to be as all-encompassing as the one by Zang and Stephansson.
Download or read book Correlations of Soil and Rock Properties in Geotechnical Engineering written by Jay Ameratunga and published by Springer. This book was released on 2015-12-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a one-stop reference to the empirical correlations used extensively in geotechnical engineering. Empirical correlations play a key role in geotechnical engineering designs and analysis. Laboratory and in situ testing of soils can add significant cost to a civil engineering project. By using appropriate empirical correlations, it is possible to derive many design parameters, thus limiting our reliance on these soil tests. The authors have decades of experience in geotechnical engineering, as professional engineers or researchers. The objective of this book is to present a critical evaluation of a wide range of empirical correlations reported in the literature, along with typical values of soil parameters, in the light of their experience and knowledge. This book will be a one-stop-shop for the practising professionals, geotechnical researchers and academics looking for specific correlations for estimating certain geotechnical parameters. The empirical correlations in the forms of equations and charts and typical values are collated from extensive literature review, and from the authors' database.
Download or read book Harmonising Rock Engineering and the Environment written by Qihu Qian and published by CRC Press. This book was released on 2011-09-14 with total page 2048 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmonising Rock Mechanics and the Environment comprises the proceedings (invited and contributed papers) of the 12th ISRM International Congress on Rock Mechanics (Beijing, China, 18-21 October 2011). The contributions cover the entire scope of rock mechanics and rock engineering, with an emphasis on the critical role of both disciplines in sustai
