Contemporary Methods for Study of Strength Characteristics of Building Rocks When Producing Crushed Stone

Number of journal: 12-2015
Autors:

Vaysberg L.A.
Kameneva E.E.
Sinitsin A.V.

DOI: https://doi.org/10.31659/0585-430X-2015-732-12-70-72
УДК: 622.732

 

AbstractAbout AuthorsReferences
Methods for the study of strength characteristics of building rocks are considered. The differences of methodic approaches to the evaluation of rock strength in domestic and foreign practice are revealed. It is noted that the domestic practice of design of crushing-and-sorting complexes assesses the strength of rocks according to the value of ultimate compressive strength. Abroad, the criterion of rock strength is a resistance to impact loads – the standardized method of drop weight (DWT), which makes it possible to determine the specific energy of destruction and impact strength of a material on the basis of which the simulation of crushing technology and selection of crushing equipment are executed. The need for comparing results of strength properties tests of rocks which are conducted with the use of different methods and assessed according to different values is indicated. Results of the strength study, using different methods, of gabbro-diabase of one of industrially developed deposits of Karelia are presented. The comparative assessment of results obtained with the use of different methods is made. On the basis of experiments, significant fluctuations in the obtained values both of the specific energy of destruction and ultimate compressive strength are revealed. The need to test a significant number of samples to obtain statistically significant and reliable results is indicated. The identification of heterogeneity in the strength properties of rocks is of great importance for operative control over the process of disintegration. It is substantiated that the solution of this problem requires the development and standardization of techniques for operative determination of strength of rocks in factory laboratories.
L.A. VAYSBERG1, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
E.E. KAMENEVA2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.V. SINITSIN3 Engineer

1 Mechanobr-Tekhnika Research and Engineering Corporation (3, 22 liniya, V.O., 199106, St. Petersburg, Russian Federation)
2 Petrozavodsk State University (33, Lenin Street, Petrozavodsk, 185910, Russian Federation)
3 Mining company Basalt AG (Russian) (49, of. 507, Krasnaja Street, Petrozavodsk, 185000, Russian Federation)

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For citation: Vaysberg L.A., Kameneva E.E., Sinitsin A.V. Contemporary Methods for Study of Strength Characteristics of Building Rocks When Producing Crushed Stone. Stroitel’nye Materialy [Construction Materials]. 2015. No. 12, pp. 70-72. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2015-732-12-70-72


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