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TECHNOLOGICAL MINERALOGY
ArticleName Microtomographic studies of rock pore space as the basis for rock disintegration technology improvements
DOI 10.17580/or.2018.03.09
ArticleAuthor Vaisberg L. A. , Kameneva E. E., Nikiforova V. S.
ArticleAuthorData

REC «Mekhanobr-Tekhnika» (St. Petersburg, Russia):

Vaisberg L. A., Company Scientific Advisor, Academician of the Russian Academy of Sciences, Doctor of Engineering Sciences, Professor, gornyi@mtspb.com

 

Petrozavodsk State University (Petrozavodsk, Russia):
Kameneva E. E., Head of Laboratory, Candidate of Engineering Sciences,
Associate Professor, elena.kameneva@mail.ru

 

Saint Petersburg Mining University (St. Petersburg, Russia):
Nikiforova V. S., Engineer of 1 Category, nikiforowa.victoria@gmail.com

Abstract

It is substantiated that studies of deformation and destruction processes must take into account the heterogeneity of the rock structure due to the variations in pore distribution in rock-forming minerals. This approach enables selection of the most energy-effective rock destruction method with account of its mineral composition and ensures prevention of overgrinding. The X-ray computer microtomography method was used to determine porosity characteristics for the main rock-forming minerals of microcline-plagioclase granite samples, namely, the concentration and dimensions of the pores. It was established that microcline grains were the weakest areas, characterized by the highest concentration and largest sizes of pores. It is noted that, when determining the pore concentration, it is of fundamental importance to evaluate their minimum size. While the maximum pore size may be determined quite accurately and, given their geometric shapes, may be estimated by their largest diameter, the minimum pore size corresponds to the spatial resolution of the tomograph, and therefore the pore concentration remains a fairly arbitrary value, depending on the experimental setting.
The work was carried out with the support of the Russian Science Foundation (project No.17-79-30056).

keywords Porosity structure of rock-forming minerals, microclineplagioclase granite, X-ray computer microtomography
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