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Author: Keneth Lupogo
Publisher:
ISBN:
Category :
Languages : en
Pages : 361
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Book Description
Consideration of blast damage in rock slope stability has been a challenging task in rock mechanics because blasting results depend on several factors that can lead to different forms of damage. Currently, it is not clear on how to consider blast damage in rock slopes. This thesis investigates the occurrence of blast damage in rock slopes using an integrated field investigation, remote sensing and numerical modelling approach. A framework for defining blast damage in the field and using remote sensing data was developed to provide the input for a blast damage model which can then be used either for numerical analysis or understanding the occurrence of blast damage features in the field. Results of field investigation and numerical simulations show that blast damage on the rock slope surface varies depending on the rock mass quality. Blast fracturing increases with decrease in rock mass quality. Observations on exposed joint surfaces in open pit slopes indicate that the blasting process has induced varying forms of damage on these surfaces. Finite-discrete element numerical modelling of blast induced damage indicates that blast damage develops in different forms from the slope surface. The simulated blast damage zone varied from complete blocks (fully connected blocks), partially connected blocks, dilation and undamaged zone. The extend of the blast damage increased with decrease in strength of the rock. A stronger rock mass show less blast damage thickness compared to a weaker rock mass. Results show that blast damage features such as blast fracture, damage along the joint surface and extension of joints all influence slope stability.
Author: Keneth Lupogo
Publisher:
ISBN:
Category :
Languages : en
Pages : 361
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Book Description
Consideration of blast damage in rock slope stability has been a challenging task in rock mechanics because blasting results depend on several factors that can lead to different forms of damage. Currently, it is not clear on how to consider blast damage in rock slopes. This thesis investigates the occurrence of blast damage in rock slopes using an integrated field investigation, remote sensing and numerical modelling approach. A framework for defining blast damage in the field and using remote sensing data was developed to provide the input for a blast damage model which can then be used either for numerical analysis or understanding the occurrence of blast damage features in the field. Results of field investigation and numerical simulations show that blast damage on the rock slope surface varies depending on the rock mass quality. Blast fracturing increases with decrease in rock mass quality. Observations on exposed joint surfaces in open pit slopes indicate that the blasting process has induced varying forms of damage on these surfaces. Finite-discrete element numerical modelling of blast induced damage indicates that blast damage develops in different forms from the slope surface. The simulated blast damage zone varied from complete blocks (fully connected blocks), partially connected blocks, dilation and undamaged zone. The extend of the blast damage increased with decrease in strength of the rock. A stronger rock mass show less blast damage thickness compared to a weaker rock mass. Results show that blast damage features such as blast fracture, damage along the joint surface and extension of joints all influence slope stability.
Author: Jianping Zuo
Publisher: Springer Nature
ISBN: 981151769X
Category : Science
Languages : en
Pages : 234
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Book Description
This book provides a comprehensive coverage of the theory and principle of the Hoek-Brown (HB) failure criterion, methods or guidelines for estimating the HB input parameters, and the methodology of application of the HB criterion in rock engineering projects. It aims to help researchers, engineers and research students who work in the area of rock mechanics and mining engineering. Academics can quickly obtain an overview of the state of the art of the theory and principle of the Hoek-Brown criterion by reading the book before they advance their researches on the topics related to rock failure criteria. Geotechnical engineers can select appropriate Hoek-Brown input parameters for the design and analysis of rock engineering projects with the help of the principles introduced in this book. Research students may use the book as a textbook to learn the principle of rock mechanics related to rock mass properties.
Author: L. Kachanov
Publisher: Springer Science & Business Media
ISBN: 9401719578
Category : Science
Languages : en
Pages : 162
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Book Description
Modern engineering materials subjected to unfavorable mechanical and environmental conditions decrease in strength due to the accumulation of microstructural changes. For example, considering damage in metals we can mention creep damage, ductile plastic damage, embrittlement of steels and fatigue damage. To properly estimate the value of damage when designing reliable structures it is necessary to formulate the damage phenomenon in terms of mechanics. Then it is possible to analyse various engineering problems using analytical and computational techniques. During the last two decades the basic principles of continuum damage mechanics were formulated and some special problems were solved. Many scientific papers were published and several conferences on damage mechanics took place. Now continuum damage mechanics is rapidly developing branch of fracture mechanics. This book is probably the first one on the subject; it contains a sys tematic description of the basic aspects of damage mechanics and some of its applications. In general, a theoretical description of damage can be rather compli cated. The experiments in this field are difficult (especially under multiax ial stress and non-proportional loading). Therefore, experimental data, as a rule, are scarce. Determination of functions and constants, which play a role in the complex variants of the theory, from available experimental data is often practically impossible. ix L.M. Kachanov The problems of damage mechanics are mainly engineering ones. Therefore, the author tries to avoid superfluous mathematical formalism. Some more details of the book's subject can be found in the list of con tents.
Author: Jianchun Li
Publisher: CRC Press
ISBN: 1000883175
Category : Technology & Engineering
Languages : en
Pages : 487
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Book Description
Rock Dynamics: Progress and Prospect contains 153 scientific and technical papers presented at the Fourth International Conference on Rock Dynamics and Applications (RocDyn-4, Xuzhou, China, 17-19 August 2022). The two-volume set has 7 sections. Volume 1 includes the first four sections with 6 keynotes and 5 young scholar plenary session papers, and contributions on analysis and theoretical development, and experimental testing and techniques. Volume 2 contains the remaining three sections with 74 papers on numerical modelling and methods, seismic and earthquake engineering, and rock excavation and engineering. Rock Dynamics: Progress and Prospect will serve as a reference on developments in rock dynamics scientific research and on rock dynamics engineering applications. The previous volumes in this series (RocDyn-1, RocDyn-2, and RocDyn-3) are also available via CRC Press.
Author: Robert Sharon
Publisher: CSIRO PUBLISHING
ISBN: 1486311016
Category : Science
Languages : en
Pages : 561
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Book Description
Although most mining companies utilise systems for slope monitoring, experience indicates that mining operations continue to be surprised by the occurrence of adverse geotechnical events. A comprehensive and robust performance monitoring system is an essential component of slope management in an open pit mining operation. The development of such a system requires considerable expertise to ensure the monitoring system is effective and reliable. Written by instrumentation experts and geotechnical practitioners, Guidelines for Slope Performance Monitoring is an initiative of the Large Open Pit (LOP) Project and the fifth book in the Guidelines for Open Pit Slope Design series. Its 10 chapters present the process of establishing and operating a slope monitoring system; the fundamentals of pit slope monitoring instrumentation and methods; monitoring system operation; data acquisition, management and analysis; and utilising and communicating monitoring results. The implications of increased automation of mining operations are also discussed, including the future requirements of performance monitoring. Guidelines for Slope Performance Monitoring summarises leading mine industry practice in monitoring system design, implementation, system management, data management and reporting, and provides guidance for engineers, geologists, technicians and others responsible for geotechnical risk management.
Author: Ke Zhang
Publisher: Springer Nature
ISBN: 9811557438
Category : Science
Languages : en
Pages : 263
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Book Description
This book presents in-depth coverage of laboratory experiments, theories, modeling techniques, and practices for the analysis and design of rock slopes in complex geological settings. It addresses new concepts in connection with the kinematical element method, discontinuity kinematical element method, integrated karst cave stochastic model-limit equilibrium method, improved strength reduction method, and fracture mechanics method, taking into account the relevant geological features. The book is chiefly intended as a reference guide for geotechnical engineering and engineering geology professionals, and as a textbook for related graduate courses.
Author: P. Yan
Publisher:
ISBN:
Category : Blasting excavation
Languages : en
Pages : 15
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Book Description
Blasting is a major means for excavation of rock slope, and the blast-induced damage to reserved rock mass must be strictly limited to ensure safety of the high slope and reduce the cost for support. As a traditional and widely used technique, the sonic wave testing is usually adopted to detect the extents of blasting damage, but the workload of detecting is considerably heavy during excavation of large-scale rock slopes with a height of several hundred meters. Thus, a simple but efficient method of blasting damage assessment based on comprehensive vibration survey was presented in this paper. In total, 5 bench blasting experiments were conducted at the excavation site of the left dam-abutment slope of the Bai-he-tan Hydropower Station in southwestern China. A semi-empirical and semi-theoretical approach for predicting the blasting damage depth based on the Peak Particle Velocity (PPV) of blasting vibration at certain distance was established. The method was used to predict the damage depth of the subsequent bench blasting with monitored vibration, and the predicted results agreed well with those obtained by field damage testing, which indicated that the method proposed in this paper is reasonable and credible. Although there is no rigorous theoretical basis, this real-time damage assessing approach is simple and convenient to use, and it can significantly reduce the massive workload of sonic wave testing and greatly improve efficiency. The accuracy of damage assessment is heavily dependent on the engineering geological conditions of excavation site and the vibration monitoring quality. Thus, careful investigation of the engineering geological conditions before blasting excavation and field experiments are necessary for the application of this method.
Author: Duncan C. Wyllie
Publisher: CRC Press
ISBN: 1498786286
Category : Technology & Engineering
Languages : en
Pages : 803
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Book Description
Rock Slope Engineering covers the investigation, design, excavation and remediation of man-made rock cuts and natural slopes, primarily for civil engineering applications. It presents design information on structural geology, shear strength of rock and ground water, including weathered rock. Slope design methods are discussed for planar, wedge, circular and toppling failures, including seismic design and numerical analysis. Information is also provided on blasting, slope stabilization, movement monitoring and civil engineering applications. This fifth edition has been extensively up-dated, with new chapters on weathered rock, including shear strength in relation to weathering grades, and seismic design of rock slopes for pseudo-static stability and Newmark displacement. It now includes the use of remote sensing techniques such as LiDAR to monitor slope movement and collect structural geology data. The chapter on numerical analysis has been revised with emphasis on civil applications. The book is written for practitioners working in the fields of transportation, energy and industrial development, and undergraduate and graduate level courses in geological engineering.
Author: John Read
Publisher: CSIRO PUBLISHING
ISBN: 0643101101
Category : Technology & Engineering
Languages : en
Pages : 511
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Book Description
Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be followed and the tools that are available to aid slope design practitioners. This book links innovative mining geomechanics research into the strength of closely jointed rock masses with the most recent advances in numerical modelling, creating more effective ways for predicting rock slope stability and reliability in open pit mines. It sets out the key elements of slope design, the required levels of effort and the acceptance criteria that are needed to satisfy best practice with respect to pit slope investigation, design, implementation and performance monitoring. Guidelines for Open Pit Slope Design comprises 14 chapters that directly follow the life of mine sequence from project commencement through to closure. It includes: information on gathering all of the field data that is required to create a 3D model of the geotechnical conditions at a mine site; how data is collated and used to design the walls of the open pit; how the design is implemented; up-to-date procedures for wall control and performance assessment, including limits blasting, scaling, slope support and slope monitoring; and how formal risk management procedures can be applied to each stage of the process. This book will assist in meeting stakeholder requirements for pit slopes that are stable, in regards to safety, ore recovery and financial return, for the required life of the mine.
Author: Wilbur Irving Duvall
Publisher:
ISBN:
Category : Blasting
Languages : en
Pages : 28
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Book Description
