| 摘要 |
FIELD: mining.SUBSTANCE: invention relates to mining engineering and operations, mining, in particular to devices for studying of physico-mechanical properties of rocks, and can be used in geology, mining, oil and gas industry for calculation of limiting values of pressure of hydraulic fracturing of formation. Essence of the invention is as follows: the rock sample is subjected to external pressure and the speeds of distribution of longitudinal and transversal elastic waves in the sample are measured. A cyclic external pressure load on the sample with alternation of loading and unloading, with gradual growth of external pressure up to the nominal value the achievement of which is obvious at the moment of stabilisation of correlation of the speed of propagation of longitudinal and transversal waves and the increase of external pressure on the sample, as a consequence the resulted values of speed of propagation of longitudinal and transversal waves are considered as true values for calculation of elasticity modulus and Poisson's constant.EFFECT: minimising the error of measurement of speed of propagation of elastic waves in core samples.1 dwg |
