Abstract:

In the geological environment, the rocks show many complex engineering features and phenomena, both associated with its form and change of internal fine structure. The characteristic parameters of rock microscopic structure are given quantitatively; and its relationship with macro-mechanics is studied, and then to further understand the mechanics of rock deformation. In order to research the relationship between rock mesomechanical structure and macroscopic mechanical behavior, the technique of SEM is applied to marble fracture of surrounding rock in diversion tunnel of a hydropower project; and a lot of information of SEM in fracture is obtained. The main research content is information abstraction and measurement of mesomechanical structure with computer image processing and analysis techniques and pattern recognition principle. By the quantitative experimental study of rock microscopic structure; it is a great significance to learn from the microscopic scale that the failure mechanism of rock. It also has an obvious reality to analyzie and evaluate engineering properties of rocks and the adaptability of the construction.

Key words: surrounding rock, failure, minuteness structure, study