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Rock dynamics has become one of the most important topics in the field of rock mechanics and rock engineering (e.g. Aydan et al., 2011; Aydan, 2016; Zhou and Jiao, 2011). The spectrum of rock dynamics is very wide and it includes, the failure of rocks, rock masses and rock engineering structures such as rockbursting, spalling, popping, collapse, toppling, sliding, blasting, non-destructive testing, geophysical explorations, and, impacts (see Figure 1.1). <...>
Geotechnical engineering is concerned with the application of civil engineering technology to some aspect of the earth, usually the natural materials found on or near the earth's surface. Civil engineers call these materials soil and rock. Soil, in an engineering sense, is the relatively loose agglomerate of mineral and organic materials and sediments found above the bedrock. Soils can be relatively easily broken down into their constituent mineral or organic particles. Rock, on the other hand, has very strong internal cohesive and molecular forces which hold its constituent mineral grains together. This is true for massive bedrock as well as for a piece of gravel found in a clay soil. The dividing line between soil and rock is arbitrary, and many natural materials encountered in engineering practice cannot be easily classified. They may be either a "very soft rock" or a "very hard soil." <...>
Although engineering activities involving rock have been underway for millennia, we can mark the beginning of the modern era from the year 1962 when the International Society for Rock Mechanics (ISRM) was formally established in Salzburg, Austria. Since that time, both rock engineering itself and the associated rock mechanics research have increased in activity by leaps and bounds, so much so that it is difficult for an ngineer or researcher to be aware of all the emerging developments, especially since the information is widely spread in reports, magazines, journals, books and the internet. It is appropriate, if not essential, therefore that periodically an easily accessible structured survey should be made of the currently available knowledge. Thus, we are most grateful to Professor Xia-Ting Feng and his team, and to the Taylor & Francis Group, for preparing this extensive 2017 “Rock Mechanics and Engineering” compendium outlining the state of the art—and which is a publication fitting well within the Taylor & Francis portfolio of ground engineering related titles.<...>
In a broad sense, what one attempts to do in rock engineering is to anticipate the motion of a proposed structure under a set of given conditions. The main design objective is to calculate displacements, and as a practical matter, to see whether the displacements are acceptable. Very often restrictions on displacements are implied rather than stated outright. This situation is almost always the case in elastic design where the displacements of the structure of interest are restricted only to the extent that they remain within the range of elastic behavior. <...>
It is hardly possible to find a single rheological law for all the soils. However they have mechanical properties (elasticity, plasticity, creep, damage etc.) that are met in some special sciences, and basic equations of these disciplines can be applied to earth structures. This way is taken in this book. It represents the results that can be used as a base for computations in many fields of the Geomechanics in its wide sense. Deformation and fracture of many objects include a row of important effects that must be taken into account. Some of them can be considered in the rheological law that, however, must be simple enough to solve the problems for real objects.<...>
Although engineering activities involving rock have been underway for millennia, we can mark the beginning of the modern era from the year 1962 when the International Society for Rock Mechanics (ISRM) was formally established in Salzburg, Austria. Since that time, both rock engineering itself and the associated rock mechanics research have increased in activity by leaps and bounds, so much so that it is difficult for an engineer or researcher to be aware of all the emerging developments, especially since the information is widely spread in reports, magazines, journals, books and the internet. It is appropriate, if not essential, therefore that periodically an easily accessible structured survey should be made of the currently available knowledge. Thus, we are most grateful to Professor Xia-Ting Feng and his team, and to the Taylor & Francis Group, for preparing this extensive 2017 “Rock Mechanics and Engineering” compendium outlining the state of the art—and which is a publication fitting well within the Taylor & Francis portfolio of ground engineering related titles. <...>
Печатается в соответствии с решением Ученого совета Национального горного университета. В монографии изложен анализ процесса развития эпюры перемещений контура пластовой выработки, расположенной в слоистом существенно неоднородном массиве слабых горных пород. Установлены зависимости влияния механических характеристик слоев пород (с учетом полных диаграмм их деформирования) на смещение любого участка контура выработки и проведен сравнительный анализ этих закономерностей с рекомендациями нормативных методик прогноза проявлений горного давления. Установлена нелинейность и особенности влияния геометрических параметров типовых сечений выработки с креплением серий КМП-А3 и КШПУ на развитие эпюры перемещений ее периметра. На базе корреляционно-дисперсионного анализа результатов многофакторного компьютерного моделирования геомеханических процессов вокруг пластовой выработки получен ряд уравнений регрессии по расчету перемещений на основных участках периметра выработки, характеризующих ее эксплуатационную пригодность. Монография может быть полезной для научных сотрудников проектных и научно-исследовательских институтов горнодобывающей отрасли, инженерно-технических работников шахт и производственных объединений, а также студентов горных высших учебных заведений и факультетов. Печатается по авторской редакции.
The evaluation of rock mass excavation (i.e. its excavatibility) has become an increasingly important factor in the economics of civil engineering, particularly for road and motorway construction projects. The most common problem associated with rock excavation is the incorrect assessment of its fracture state. This can result in large delays to the programme with consequent claims and tends to reflect poorly on the service provided by the geotechnical professional. <...>
Proceedings of the 14th international conference of international association for computer methods and recent advances in geomechanics, Kyoto, Japan, 22–25 september 2014
Over the last half a century, constitutive models for geomaterials and numerical analysis methods have been well developed. Nowadays, numerical methods play a very important role in Geotechnical Engineering. The first pioneering conference was held at Waterways Experiment Station, Vicksburg, Mississippi, USA in 1972 under the leadership of Prof. C.S. Desai. Then, subsequent conferences were held in Blacksburg (USA) – 1976, Aachen (Germany) – 1979, Edmonton (Canada) – 1982, Nagoya (Japan) – 1985, Innsbruck (Austria) – 1988, Cairns (Australia) – 1991, Morgantown (USA) – 1994, Wuhan (China) – 1997, Tucson (USA) – 2001, Torino (Italy) – 2005, and Goa (India) – 2008. Now the conference is organized by IACMAG every three years. The last one, the 13th International Conference on Computer Methods and Advances in Geomechanics, was held in Melbourne, Australia in 2011. The 14th conference, here in Kyoto, was accepted at the Melbourne conference in 2011. This conference series is the main activity of the International Association for Computer Methods and Advances in Geomechanics founded in 70’s by Prof. C.S. Desai of the University of Arizona; the present president of IACMAG is Prof. J. Carter of the University of Newcastle. <...>
It is well known that numerical methods play a very important role in geotechnical engineering and in a related activity called “computational geotechnics”. The area that is covered by computational geotechnics is growing, in particular that which relates to the multiphase nature of geomaterials. This book is the second volume of Computational Modeling of Multiphase Geomaterials that was published in 2012 and provides recent progress in this area, i.e., the basic concept of the air–water–soil mixture, cyclic constitutive models, anisotropic models, non-coaxial models, gradient models, strain localization including compaction bands, dynamic strain localization, and the instability of unsaturated soils.