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

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).

1. Revnivtsev V. I., Gaponov G. V., Zarogatskiy L. P. et al. Selective destruction of minerals. V. I. Revnivtsev (ed.). Moscow: Nedra, 1988. 286 p.
2. Arsentyev V. A., Vaisberg L. A., Zarogatskiy L. P., Shuloyakov A. D. Production of cube-shaped crushed stone and building sand using vibrating crushers. St. Petersburg: VSEGEI Publ., 2004. 114 p.
3. Rzhevskiy V. V., Novik V. Ya. Fundamentals of rock physics. 3rd ed., revised and add. Moscow: Nedra, 1978. 390 p.
4. Yakushina O. A., Ozhogina E. G., Khozyainov M. S. Microtomography of technogeneous mineral matter. Vestnik Instituta Geologii Komi Nauchnogo Tsentra Uralskogo Otdeleniya RAN. 2015. No. 11 (251). pp. 38–43.
5. Yakushina O. A., Khozyainov M. S. Study of ores and rocks by X-ray tomography (technological mineralogy). Progressive methods of beneficiation and complex processing of natural and technogenic mineral raw materials (Plaksinsky readings — 2014). Almaty: «Tsentr Nauk o Zemle, Metallurgii i Obogashcheniya» JSC Publ., 2014. pp. 593–594.
6. Ketcham R. A., Carlson W. D. Acquisition, optimization and interpretation of X-ray computed tomographic imagery: Applications to the geosciences. Computers and Geosciences. 2001. Vol. 27. pp. 381–400.
7. Carlson W. D. Three-dimensional imaging of earth and planetary materials. Earth and Planetary Science Letters. 2006. Vol. 249. pp. 133–147.
8. Dong H., Blunt M. J. Pore-network extraction from micro-computerized-tomography images. Phys. Rev. E. 2009. Vol. 80, Iss. 3. pp. 036307 (1–11).
9. Wu D., Peng X. F. Investigation of water migration in porous material using micro-CT during wetting. Heat Transfer-Asian Research. 2007. Vol. 36 (4). pp. 198–207.
10. Kudriashova A. I., Shtirlyaeva A. A. The statistical rationale of the measurement of the Siberian platform terrigenous rocks porosity using X-ray microtomography. Geologiya, Geografiya i Globalnaya Energiya. 2017. No. 4 (67). pp. 63–74.
11. Vaysberg L. F., Kameneva E. E., Aminov V. N. Assessment of technological capabilities of control over crushed stone quality in the course of disintegration of building rocks. Stroitelnye Materialy. 2013. No. 11. pp. 30–34.
12. Vaisberg L. A., Kameneva E. E. X-ray computed tomography in the study of physico-mechanical properties of rocks. Gornyi Zhurnal. 2014. No. 9. pp. 85–89.
13. Talovina I. V., Aleksandrova T. N., Popov O., Lieberwirth H. Comparative analysis of rocks structuraltextural characteristics studies by computer X-ray microtomography and quantitative microstructural analysis methods. Obogashchenie Rud. 2017. No. 3. pp. 56–62. DOI: 10.17580/or.2017.03.09.