Download or read book Development of Simple Techniques for In situ Determination of Rock Deformation with Particular Reference to Specimen Size and Far field Stress Effect written by Kern S. Yoon and published by . This book was released on 1987 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts written by and published by . This book was released on 1987-10 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1987 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts Literature and Patents written by and published by . This book was released on 1987 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Rock Stress written by Ming Lu and published by CRC Press. This book was released on 2006-06-08 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the stress state in the earth's crust is crucial for engineers working in rock, particularly with regard to underground construction. Experience shows that an adequately high horizontal in-situ stress has a positive effect in stabilizing large span rock caverns close to the ground surface. On the other hand, high stresses resulting fr
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of the in Situ Modulus of Deformation of Rock written by and published by ASTM International. This book was released on 1970 with total page 206 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 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 Evaluation of Soil and Rock Properties written by P. J. Sabatini and published by . This book was released on 2004-10-01 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document presents state-of-the-practice information on the evaluation of soil and rock properties for geotechnical design applications. This document addresses the entire range of materials potentially encountered in highway engineering practice, from soft clay to intact rock and variations of materials that fall between these two extremes. Information is presented on parameters measured, evaluation of data quality, and interpretation of properties for conventional soil and rock laboratory testing, as well as in situ devices such as field vane testing, cone penetration testing, dilatometer, pressuremeter, and borehole jack. This document provides the design engineer with information that can be used to develop a rationale for accepting or rejecting data and for resolving inconsistencies between data provided by different laboratories and field tests. This document also includes information on: (1) the use of Geographical Information Systems (GIS) and Personal Data Assistance devices for the collection and interpretation of subsurface information; (2) quantitative measures for evaluating disturbance of laboratory soil samples; and (3) the use of measurements from geophysical testing techniques to obtain information on the modulus of soil. Also included are chapters on evaluating properties of special soil materials (e.g., loess, cemented sands, peats and organic soils, etc.) and the use of statistical information in evaluating anomalous data and obtaining design values for soil and rock properties. An appendix of three detailed soil and rock property selection examples is provided which illustrate the application of the methods described in the document.
Download or read book Rockbolting written by Charlie Chunlin Li and published by Butterworth-Heinemann. This book was released on 2017-06-01 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rockbolting: Principles and Applications brings current theoretical and practical developments in the most widely used support device for underground rock excavations. Today, one cannot find any rock excavation project that does not use rockbolts for rock support. The worldwide annual assumption of rockbolts is in the billions, with pieces applied to mines, tunnels and other types of geotechnical projects for rock and soil reinforcement. The text is based on over 25 years of experience of the author both as academic and practitioner. The book introduces the principles and background concepts of rock support, and then offers a comprehensive overview of the mechanics of rockbolting, as well as current rock bolt types such as mechanical, grouted, self-drilling, grouted cables, frictional and yield rockbolts. Installation and performance assessment are covered next including load-displacement curves and energy-absorption capacities. Two chapters on design and quality control, respectively, cover failure mechanics, the selection process and the connections with other supporting devices. On quality control, the author explains the usual tests and displacement measurements. The final chapter brings current case studies that combine the concepts presented in the whole book. The book is a professional reference for engineers in the mining and geotechnical industries and can be used as research material for academics in rock mechanics and stability studies. Offers theoretical knowledge on rock bolts and rockbolting Covers the standard and most recent types of rockbolts Includes information on rockbolting in high stress rock Presents case studies that introduce practical applications in several conditions
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 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 Rock Deformation A Symposium written by David Griggs and John Handin and published by Geological Society of America. This book was released on 1960 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determination of Stress in Rocka state of the Art Report written by and published by ASTM International. This book was released on 1967 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acoustic Emission Testing written by Christian U. Grosse and published by Springer Science & Business Media. This book was released on 2008-07-12 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic Emission (AE) techniques have been studied in civil engineering for a long time. The techniques are recently going to be more and more applied to practical applications and to be standardized in the codes. This is because the increase of aging structures and disastrous damages due to recent earthquakes urgently demand for maintenance and retrofit of civil structures in service for example. It results in the need for the development of advanced and effective inspection techniques. Thus, AE techniques draw a great attention to diagnostic applications and in material testing. The book covers all levels from the description of AE basics for AE beginners (level of a student) to sophisticated AE algorithms and applications to real large-scale structures as well as the observation of the cracking process in laboratory specimen to study fracture processes.
Download or read book In Situ Rock Stress Measurement Interpretation and Application written by Abhinav Mishra and published by . This book was released on 2015-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding in-situ rock stress is important in the exploration and engineering involving rock masses for mining, hydropower, tunneling, oil and gas production, and stone quarrying. Traditional methods of determining these stresses have not developed substantially to keep pace with the increasing utilization of rock masses. Contributed by a group of leading experts, this book addresses new developments in numerical modeling and advanced measuring techniques. In-Situ Rock Stress: Measurement, Interpretation and Application reflect the development in this field, covering measuring techniques, interpretation methods, and application of the in-situ stress in engineering practice. Estimate of the in-situ rock stress state can be realized by direct or indirect methods. Although the indirect method has developed rapidly in recent years, the direct field measurement is still by far dominating. Great improvements have been achieved with the 'traditional' field tests by overcoring and hydraulic fracturing, whilst the recently developed methods become matured. In addition, ideas of new methods and new instruments will make the stress estimate easier, less expensive and more reliable.
