DETERMINATION OF SHAPES AND SIZES OF RADIAL CRACKS FORMED BY BLASTHOLE CHARGES AND HYDRAULIC FRACTURING IN A LAYERED ROCK MASS
E. N. Sher
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Взрыв, горные породы, слоистый породный массив, скважинный заряд, радиальные трещины, гидроразрыв, форма трещин, Blast, rocks, layered rock mass, blasthole charge, radial cracks, hydraulic fracturing, crack shape
Abstract
The features are investigated and a design diagram is developed for radial cracks propagation in a layered rock mass during blasting of borehole charges and hydraulic fracturing. To calculate the stress state of an elastic rock mass with cracks, we used the boundary element method in a three-dimensional formulation. As a result of these calculations, the influence of the strength properties of rock mass layers on the shape of radial cracks and their area was determined
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