rock mechanics and rock engineering pdf

The optimisation of the effective parameters on fragmentation was studied by design of experiments (DOE) method, where the specific charge was ranked first in terms of importance. Download PDF. Fracture toughness of rocks under sub-zero temperature, conditions. Many magnetized geological objects (for instance, iron, magnetite and other deposits) may be classified for its further commercial employment without high-expensive drilling and mining works. Engineering Properties of Rocks, Second Edition, explores the use of typical values and/or empirical correlations of similar rocks to determine the specific parameters needed. Fluids ), 2, Bieniawski ZT. (Eng.) Philos Transac Roy Soc Lond 1914; exhibition on mass mining. To accomplish the two missions, rock mechanics faces following challenges: (1) how to make drilling, crushing and grinding more efficiently, in particular for grinding whose energy efficiency is less than 1%; (2) how to make full use of explosive energy and destroy rock effectively; (3) how to manage, reduce and finally predict seismic events and rock bursts; (4) how to develop various mining methods; (5) how to reduce borehole damage in deep mines or in the mines with high in-situ stresses; (6) how to increase ore recovery and decrease dilution; (7) how to improve mining safety; (8) how to make rock support designs more scientifically. Mining Science. It is a truly interdisciplinary subject, with applications in geology and geophysics, mining, petroleum and geotechnical engineering. Int J Rock, Kolsky H. Stress waves in solids. Daniel Reveron. The final chapter brings current case studies that combine the concepts presented in the whole book. endobj The studies on this angl, More details can be found in Zhang (2016a). In this paper, mine to mill optimization has been designed and implemented in the Sarcheshmeh copper mine. As one of the four fundamental issues of rock mechanics (i.e., anisotropy, disconti-nuity, heterogeneity, and nonlinearity), anisotropy has been extensively investigated [1]. After these holes are fired, a long delay time is given to the next blasthole so that the fragments from the first two-hole blasting have enough time to fall down. %PDF-1.7 blasting results. Rock mechanics has two missions to accomplish in mining engineering, as sho wn in Fi g. 1: (1) to destroy rock efficiently; (2) to make rock structures safe. If these two missions are completed and mining operations are well managed, best mining results should be achieved. Rock Mechanics - an introduction for the practical engineer E. Hoek, Ph.D., M.Sc. With the help of statistical analysis, the relation between proper fragmentation of the blast and performance and efficiency of other production systems was studied. cavities and joints in a rock mass. 10. The subject of rock mechanics has evolved from different disciplines of applied mechanics. Rock mechanics along with geological studies can decide on whether rock slides or rock falls could take place and the measures that would be needed to prevent them. All these challenges will be analyzed in this paper. Reduction of energy consumption in comminution is of significant importance in mining industry. Then, specific drilling, specific charge and specific loading indices have been calculated and measured. Int J Rock Mech Min Sci 2000;37(5, Hard Rock Laboratory. Energy efficiency in rock drilling, crushing, e get the total surface area S of one ton of the m, Figure 4. Rock fall from a weak zone in the roof (a) and f, element(s) to stable ground. Engineering Rock … %���� Rock mechanics of deep mining engineering mainly refers to rock mechanics problems related to roadway engineering and stope engineering that are caused during the process of deep resource mining. It is well documented in the literature that the Brazilian indirect tensile test provides over estimated tensile strength values compared to the direct tensile test. In such schemes, the precision of the compaction recovery is inadequate. stream endobj Borehole instability problems in sublevel caving. 1 0 obj This special issue of Rock Mechanics and Rock Engineering contains ten papers that are a representative sample of contributions from the 47th US Rock Mechanics… First, we will see the fracture surf. Journal of Rock Mechanics and Geotechnical Engineering (JRMGE) is concerned with the latest research achievements in rock mechanics and geotechnical engineering. Rockbolting: Principles and Applications brings current theoretical and practical developments in the most widely used support device for underground rock excavations. Int J Rock Mech Min Sci Ge, (Society for Mining, Metallurgy, and Exploration, In. energy efficiency, decreased with incr, Notice that the energy efficiency in previous s, split Hopkinson pressure bar system, the energ, is almost zero but that in the high-pressure, and the loading system plays an important role. Today, one cannot find any rock excavation project that does not use rockbolts for rock support. 35 Full PDFs related to this paper. The objective of this work is the investigation of potential modification of the Brazilian indirect tensile strength formula by the analysis of the relevant published laboratory data. A detailed account of the general rock engineering design process has been given by Feng and Hudson (2011), which represents the outcome of the work of the Commission on Rock Engineering Design Methodology of the International Society for Rock Mechanics in the period 2007–2011. Figure 6. The loading and crusher sector has a significant relation with over fragmented percentage that is due to the potential of the fine production caused by blast operation. By doing this, a new free surface and a swell room can be created. Engineering rock mechanics is the discipline used to design structures built in rock. Marketable coal from the Oktyabr'skaya mine (Y = 14 mm) would then be classed as type Zh. Nielsen K, Kristiansen J. Blasting-crushing-grinding: conference on explosives and blasting technique. New York, Bond FC. The most reliable source for these properties is the laboratory tests. The learning goals of the MINETRAIN project are that learners have the skills for sustainable management of any phase of sustainable mining operations - from exploration and discovery of the mineral resource, through a feasibility study, mine design, development of plans, production and process operations to mine closure. Soils • Anything that can be excavated by a shovel ! This note provides an introduction to the mechanics of materials and structures. Effect of loading rate on energy efficiency in rock. • What is the shear strength of rocks? Based on the analysis performed in this study, using published laboratory measurements, the conventional Brazilian indirect tensile strength formula has been modified by the incorporation of Poisson’s ratio effect (BTS= 2(1-ν)L/πDt). (a) Production blasthole is sheared, broken, and jammed; (b) production blasthole is fractured (Zhang 2016a). It comprises: a marine seismic streamer; a vessel for towing the streamer through a body of water; at least one streamer recovery unit connected into the streamer, the unit comprising: a housing; a source of compressed gas positioned in the housing and having an outlet; a valve for closing and opening the outlet; an inflatable, flotation, The first classification of bituminous coal from the Pechora coalfields, adopted in 1954, characterizes the coal as having a caking capacity or plastic layer thickness (Y) of 10-15 mm. Control of caving boundary by excavating boundary tunnels. Read the latest articles of Journal of Rock Mechanics and Geotechnical Engineering at ScienceDirect.com, Elsevier’s leading platform of peer-reviewed scholarly literature Rock mechanical properties are essential input in many design applications in petroleum, mining, environmental and civil engineering. this is a field to be paid attention in the future. In: Alejano LR, Perucho A, Olalla C, Jiménez R (eds) Rock engineering and rock mechanics: structures in and on rock masses (Proceedings of EUROCK 2014, Vigo, Spain, 26–28 May 2014), CRC Press, Leiden, pp 1511–1516 Lectures on Rock Mechanics • SARVESH CHANDRA ... discipline that uses the principles of mechanics to describe the behaviour of rock of engineering scale. Difference between fracture surface energ, The total surface area S of the mineral composed of N, Assume that bond Work Index for one ton of the m, 1.5. Graduate-level requirements include a research project. Two chapters on design and quality control, respectively, cover failure mechanics, the selection process and the connections with other supporting devices. Among the parameters under study, the specific charge and the hole diameter have a very high correlation coefficient with D_50 and D_80, so that in most of the proposed models, the correlation coefficient was higher than 0.9. Laborator, Zhang ZX. Subdrilling in sublevel caving (Zhang 2016, stress fields at the boundaries changed. Surface energies of rock, Mechanics and Engineering 1998;17(Supp. Part A of this book can be read as a narrative consisting of sequences of text, questions and answers, or in Part B the same questions can be tackled without the answers being visible. Basalt, fine, massive, vesicular, dark grey to black. Influence of rock blasting on ore recovery and the environment, Modification of the Brazilian indirect tensile strength formula for better estimation of the tensile strength of rocks and rock‐like geomaterials, Mine to mill optimisation in Sarcheshmeh copper mine, Mine to mill optimisation in Sarcheshmeh copper mine, Kerman, Iran, Applying fundamental principles of stress waves to production blasting in LKAB Malmberget mine, Impact of rock blasting on mining engineering, Kinetic energy and its applications in mining engineering, Failure of hanging roofs in sublevel caving by shock collision and stress superposition, Crushing and grinding calculations Part II, Improving slope stability with electronic delays, MINETRAIN. This is a big pro, how the energy efficiency can be increased in rock blas, of both fracture energy and seismic energy in the case, without any breakage. 382 Pages. Some investigations on, reduce such a spalling, blast plan or design m. Figure 9. 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. For rocks, the indirect tensile test is the most convenient in terms of samples preparation, testing requirements, and availability of appropriate standards. to determine the correct angles. The book covers the necessary understanding and the key techniques supporting the rock engineering design of structural foundations, dams, rock slopes, wellbores, tunnels, caverns, hydroelectric schemes and mines. exists a great potential to increase ore recovery b, stresses in another decreased. These structures encompass building foundations, dams, slopes, shafts, tunnels, caverns, hydroelectric schemes, mines, radioactive waste repositories and geothermal energy projects: in short, any structure built on or in a rock … NAME AND NATURE OF THE AWARDS (a) The ISRM Young Rock Engineer Award acknowledges excellence in the field of rock engineering by ISRM members who are in early stages of their career. The text is based on over 25 years of experience of the author both as academic and practitioner. Rocks • Solid, dense aggregates of mineral grains ! repositories of nuclear wastes (Zhang 2016a). A clastic lithological compaction unit classification method, based on clay content, has been designed to identify lithological boundaries and establish sets of compaction units. 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. <> Mine to mill optimisation will lead to a systematic reduction of production costs in an open mine. , other types of damage may need, combining analytical, geological and even numeric, from! Then be classed as type Zh and specific loading indices have been calculated and.. Paper analyzed the formation of a percuss Gur Y, Sprecher a, 1987 Tavares! Friedman m, Figure 7 Friedman m, Handin J, Thorleyb U, ED. Reduce the cost in fragmentation philos Transac Roy Soc Lond 1914 ; exhibition mass... The examples presented here show that a better understanding of paleo-geomorphology can be gained by applying the proposed recovery. Speed and density are easil, rock mechanics in all its varied aspects including laboratory testing, field investigations computational. 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