Download or read book Determination of Stress and Damage Levels of Rocks Using Acoustic Emission and the Kaiser Effect written by Li Chunlin and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Determination in Rock Using the Kaiser Effect written by Michael J. Friedel and published by . This book was released on 1990 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Stress Determination in Soil and Rock Using the Acoustic Emission Method written by Arthur E. Lord and published by . This book was released on 1984 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: A project was undertaken to determine how well acoustic emission (AE) techniques could be used to determine the existing stress state in rock and soil masses. It was found in rock that the Kaiser Effect (No AE until previous stress level EXCEEDED) was obeyed for short times (delay times) after stress application, but was not obeyed for delay times longer than about 100-1000 hours. In soil, the Kaiser effect was obeyed, but the effect of delay times was not investigated. These results apply to a very wide variety of rock and soil types. A Goodman rock jack was retrofitted with an AE transducer assembly and field tested in large discrete rock masses at a rock quarry and in bore holes in six different sites with varying rock types. This acoustic-rock jack functioned very well above and below the water table. The existing horizontal stresses, predicted from breaks in the AE versus applied stress curves, were of the same order (on the higher end) as those determined by more conventional mthods of determining the existing stress state. A Menard pressuremeter was retrofitted with an AE transducer assembly, and used in bore holes in the field in various soil types. Preliminary field work has shown this acoustic pressuremeter to work well to depths of 10 feet (only used above the water table so far). The existing horizontal (lateral) stresses predicted from the AE pressuremeter results were in the higher portion of the expected values.
Download or read book Assessment of Damage in Brittle Rocks Using the Acoustic Emission Technique and the Kaiser Effect written by Marcus Fuchsschwanz and published by . This book was released on 2005 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Determination in Rock Using the Kaiser Effect written by United States. Bureau of Mines and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In situ Rock Stress written by Michael Tucker and published by CRC Press. This book was released on 2015-10-12 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the new classification of chronic myeloproliferative disorders, and the rise of interest in molecularly targeted therapies, this timely text brings together international experts on the topic to discuss the current technologies and their implications for the treatment of patients. This title comprehensively covers chronic myeloid leukemia and Ph-negative chronic myeloproliferative disorders and is an essential resource for all practitioners in Hematologic Oncology.
Download or read book Investigation of In situ Stresses in Rocks Via Acoustic Emission and the Kaiser Effect written by Derrick Jay Blanksma and published by . This book was released on 2011 with total page 0 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 In Situ Stress Determination in Rock Using the Acoustic Emission Technique written by John Joseph McElroy and published by . This book was released on 1985 with total page 698 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 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 Rock Mechanics In Underground Construction Proceedings Of The 4th Asian And International Rock Mechanics Symposium 2006 With Cd rom written by Chun Fai Leung and published by World Scientific. This book was released on 2006-11-06 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume contains over 300 papers on rock mechanics and engineering with contributors from all over Asia and many other parts of the world. Seven keynote papers summarize the state-of-the-art in rock engineering including topics such as underground rock caverns. The technical papers cover a wide range of rock mechanics and engineering topics: rock tunnels, caverns, mining, rock slopes and dams, rock blasting, rock burst and failure, rock properties, rock mass, rock joints, and block theory. Numerous valuable rock engineering case studies are also reported.This volume should serve as a useful reference for the engineers and researchers in rock mechanics and rock engineering.
Download or read book Acoustic Emission Signatures of Microcrack Damage in Rock written by M. V. M. S. Rao and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades, controlled laboratory experiments of rock fracture & friction, and monitoring and analyses of accompanying acoustic emissions (AE), and application of fractals to investigate the failure zone development and its growth in rock under simulated field conditions have become possible. This development has contributed more to the fracture mechanics research of rock as well as for better planning and execution of field experiments aimed at structural health monitoring, and forewarning and control of rock bursts in deep mines etc. Furthermore, the utilization of simpler and PC-based AE monitoring systems can yield fruitful results to detect, track, analyze and quantify the various stages of microcrack damage in rock as detailed in this monograph. Among various parameters, the occurrence rate of AE events and energy, b-values, cumulative energy counts and energy per event have been found to be more helpful to make a detailed study and quantify the stress-induced microcrack damage in rock. This monograph will be useful for active researchers, academicians, NDT professionals and graduate students of geological sciences and related engineering fields.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Damage and Fluid Transport Part I written by G. Dresen and published by Springer Science & Business Media. This book was released on 2008-01-24 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanical properties and fluid transport in rocks are intimately linked as deformation of a solid rock matrix immediately affects the pore space and permeability. Part I of this topical volume covers mainly the nucleation and evolution of crack damage in rocks, new or modified techniques to measure rock fracture toughness and a discussion of upscaling techniques relating mechanical and fluid transport behaviour in rocks at different spatial scales.
Download or read book Report of Investigations written by and published by . This book was released on 1989 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Fragmentation by Blasting written by B. Mohanty and published by CRC Press. This book was released on 2020-12-17 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of symposium papers covers a wide range of topics on rock fragmentation, from carefully documented case studies to attempts, for example, at fractal representation of the fracture process itself.
