EXPERIMENTAL METHODS OF STUDYING THE STRUCTURE, STATE AND PHYSICO-MECHANICAL PROPERTIES OF ROCKS
A. N. Kochanov
Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, Russia
Keywords: Методы, разрушение, горные породы, структура, микротрещины, свойства, эксперимент, Methods, failure, rocks, structure, microcracks, properties, experiment
Abstract
The possibilities and results of using the methods of X-ray computer microtomography, ultrasonic measurements, nano-and microindentation, control of submicronic particles formation applicably to studying dynamic rock failure are discussed. The X-ray computer microtomography was used for studying pore and microcrack distribution in the sample volume. The ultrasonic method was applied to control the condition of samples before and after dynamic effect. The method of micro-and nanoindentation helped to determine hardness, Young’s modulus at various scale levels, and failure viscosity. The patterns of submicronic particle formation during the coal samples failure under dynamic effect are investigated. It is shown that investigation results are important for geomechanical support of mining operations, including studying such phenomena as rock bursts, sudden coal and gas outbursts.
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