Authors: S.N. Shabaev

Title of the article: Influence of crushed rock particle size on elastic modulus value

Year: 2018, Issue: 5, Pages: 35-42

Branch of knowledge: Earth sciences

Index UDK: 622.2

DOI: 10.26730/1999-4125-2018-5-35-42

Abstract: When calculating the haul road pavement, the elasticity theory solutions are mainly used. To determine the actual deformations caused by an external load, it is necessary to know the elasticity moduli of the media. Pavement layers of open-pit mine roads are often constructed with overburden or surrounding crushed rock, while the elastic modulus standard design values of which are not available, which leads to errors in the decisions made. The analysis of the earlier studies has shown that in assessment of the deformation parameters, undercounting of the influencing factors gives particular values of the elastic modulus with different regression dependencies and cannot be used in all cases. The dependence of the static elasticity modulus of crushed rock on their average particle size was obtained on the basis of the laboratory investigations described in the article, and its adequacy was proved by comparison with the standard design values for various materials. It is established that the influence of the particle size can be taken into account by using the particle size coefficient, which is the cumulative ratio of the fraction of particles of the i-th fraction to the power function of the decimal logarithm of its average particle size.

Key words: crushed rock elasticity modulus particles open-pit mining road

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