1. Illustrate velocity dependence and sensitivity to elastic constants and environmental factors 2. Examine rock-property transforms

This chapter introduces the theoretical background and summarizes the most important constitutive equations of the stress sensitivity approach for arbitrary anisotropic media under arbitrary load. Therefore, it starts with some general remarks the principles of linear elasticity for anisotropic media as defined by Hooke's Law. This will include the definitions of the important elastic parameters, e.g. the compliances of anisotropic rocks, bulk modulus, shear modulus, and Young's modulus, and the definition of the stress and strain tensor.

Eastern-European Journal of Enterprise Technologies, 2018

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Int. J. Rock Mech. & Geomech. , 2016

The idea that one of these areas of study, either Geomechanics, or Rock Mechanics, is included entirely into the other, or that it is a division of the other is mistaken. Both share common units of study (chapters, sections and topics), but they also have distinct sections, found in only one of them. This technical note presents the author's views about what should be included into the two areas (disciplines and sciences), both in their shared area of study, and in the specific sections, distinct to each of them. From a mechanical point of view - in general, the rocks are subject to various natural phenomena and /or technological processes taking place on an industrial scale or as an experiment, which may cause mechanical or mechanical effects. Therefore, phenomena and processes of this kind can be classified into two categories: - mechanical, the displacements, deflections and / or modification of the properties of rocks caused by the action of forces and / or pressures (eg, compaction under the weight of the rock layers above); - non-mechanical (physical, chemical), but with mechanical consequences that have as a result either the emergence of new tension states or the modification of the existing mechanical properties and parameters. An example of this is the phenomenon of swelling that increases the volume of shale layers and, under in situ conditions, generates additional pressure on surrounding rock layers.

Mining Revue

In the field of mining, one of the exploitation methods that is still the most used in rock salt, potassium, and magnesium salt deposits is the method with the room and abandoned pillar. The salt mining method with rooms and pillars represents a unique spatial system for which the establishment of an optimal correlation between the parameters of the room, pillar, and rock massif is required in any given situation. Thus, the dimensioning of the most requested element in the system is followed, and depending on its parameters, the other parameters of the system are established. Considering the exploitation method with rooms and pillars, the pillars are certainly the elements that are subjected to the greatest loads. In the situation where the deep exploitation of salt is done with square pillars, the evaluation of the optimal parameters of the elements of the exploitation system requires: establishing the loads that appear in the surrounding salt massif (the natural stress state); the...

Geomechanics of Oil and Gas Wells

2012

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