Citation

Liu L, Shui QC. Disaster Adv. 2012; 5(4): 133-138.

Copyright

(Copyright © 2012, Shankar Gargh)

DOI

unavailable

PMID

unavailable

Abstract

Rock microscopic characteristics will change before rock engineering disasters. In this study, the microstructure of rock and cell of rock are researched by means of SEM. Stretches of rock microcrack are analyzed. The fractal characteristics are calculated by dissipated energy consumed by microstructure fracture. The form and direction of crack stretch in rock are analyzed by way of loading. The regularity of damage evolution in rock is explained. The generation, distribution and elongation procedure of rock crack are analyzed by the use of fractal geometry and micro-thought methods. The characteristics of micro-damages and evolution of rock cracks are explored by means of experimental observation and calculation of the dissipative force. The analysis shows that the speed, direction and quantity of microcrack stretch is dependent mainly on the component, combination of mineral, combinatorial density, quantity and direction of load, state of stress and its ratio, when the crack is expanding from micropore to macrograph fissure.