Engineering rock mechanicsan introduction to the principles ppt

I., . . on i I Engineering rock mechanics an introduction to the principles [...]... interaction between the rock mass and the engineered structure As a result, the distinct discipline of engineering rock mechanics has developed The term rock mechanics’ refers to the basic science of mechanics applied to rocks; whilst the term rock engineering refers to any engineering activity involving rocks Thus, the term engineering rock mechanics’ refers to the use of rock mechanics in rock engineering- within... consistent intact rock Figure 2.2 'Layered' intact rock Rock as an engineering material 13 the properties of the material, the pre-existing stress state in the ground (which will be disturbed by engineering) and consider these in relation to our engineering objective In civil engineering, the main objective is to create a structure by removing the rock In mining engineering, it is to obtain the material... base for these activities is a knowledge of the geological strata, any alteration to the rock material, the presence of large- and small-scale faulting and jointing in the rock, and indeed any geological parameter that is relevant to the engineering Clearly, the rock type, the rock structure, any alteration to the rock, the in situ stress state and hydrogeological regime will be important for all engineering. .. natural rock environments within which the engineering occurs and the specific ways in which the geological setting directly affects both the rock mechanics and the engineering design 2.2 Natural rock environments In addition to the direct properties of the rock and rock masses as described above, we have to remember that the natural rock environment can also have a profound effect on the engineering. .. address the question above and will assist in the design process 1.2 Content of this book This book is intended for anyone involved in rock mechanics and rock engineering From the text in the previous section, the reader will have noted that we are making a special attempt to present the principles and then to place them in the engineering context Thus, the book can be used for both introductory and... (tunnel face to left, tunnel wall to right of photograph) made in rock Clearly, it is helpful to be able to evaluate the stability of the excavation-whatever size it may be This highlights another crucial aspect which has only really been developed since the 1970s, and that is understanding the full role of the rock structure, i.e not only the intact rock but also the rock fractures and their three-dimensional... the main factor that distinguishesrock mechanics from other engineering disciplines is the application of mechanics on a large scale to a pre-stressed, naturally occurring material In the two photographs in Figs 1.1 and 1.2, we illustrate a typical fullscale rock structure and a closer view of the rock material itself It is quite clear from these illustrations that the nature of the rock mass and the. .. generally about the influence of geological history on rocks and rock masses, ideas that will apply to all sites and all proposed site investigations, whether for civil or mining engineering 2.3 The influence of geological factors on rocks and rock masses Five main subjects are discussed below in terms of the influence of geological factors on rocks and rock masses In the context of the mechanics problem,... and apply the principles presented in the first 13 chapters This book is about the principles of engineering rock mechanics The book is not intended to be truly comprehensive in the sense of including all information on the rock engineering subject Readers requiring more information are referred to the five volume compendium Comprehensive Rock Engineering, edited by the first author and also published... highly variable This is demonstrated in Figs 2.1-2.3 The rock will be used either as a building material so the structure will be made of rock, or a structure will be built on the rock, or a structure will be built in the rock In the majority of civil engineering cases, rock is removed to form the structure as in, for example, the excavation of rock for a hydroelectric machine hall chamber In this . . . on i I Engineering rock mechanics an introduction to the principles