METHOD FOR LOADED ROCK WEAKENING DETERMINATION Russian patent published in 2005 - IPC

FIELD: mining and rock sampling, particularly devices for testing in situ the hardness or other properties of minerals.

SUBSTANCE: method involves determining quantity and size of natural microcracks in unit volume of rock sample in predetermined point thereof; applying standing electromagnetic wave field to the rock sample; determining heating temperature and defect structure, as well as quantity and size of formed microcracks in above point within above temperature range; making a plot of crack concentration as a function of crack size; determining crack confluence coefficient from above plot as ratio of two sizes of cracks with the highest concentration; calculating rock strength σ from mathematical equation, making plot σ=ƒ(T) and separating rock weakening process into several technological stages.

EFFECT: increased efficiency of rock weakening during mineral production and treatment; possibility to control microcrack development; increased accuracy of investigation.

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