COEFFICIENTS OF LOOSENING AND SWELLING OF ROCKS

It is known that weak rocks feature bulking under disintegration or extra loosening. As a result, the majority of the physical properties of rocks change their values. The article shows that bulking of rocks depends on the nature of rock failure, genesis, moisture and ice contents, initial grain size compositions, as well as time of being in loose state, and other factors. In order to have more accurate data on the change in the volume of rocks, it is necessary to take into account the coefficient of loosening in dry and wet rocks, K1 and Klw , and coefficient of swelling in unripped and ripped rocks,Ksw and Krsw, respectively, in real time. It is found that rocks, despite their condition, obey the equalityK1Krsw = KlwKsw. This equality is used as the basis for the integrated loosening–swelling factor proposed for the assessment of loose rock volume using experimental data.

Keywords

Rock, soil, loosening, moisture, swelling, shrinkage.

Issue number: 2
Year: 2019
ISBN: 622.02:552(045)
UDK:
DOI: 10.25018/0236-1493-2019-02-0-206-213
Authors: Yanchenko G. А.

About authors: Yanchenko G.А., Doctor of Technical Sciences, Professor, Mining Institute, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

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