Issue 1(45), 2017

DOI 10.21440/2307-2091-2017-1-59-61

Accounting for the scale effect in designing parameters of mining technology pdf

O. G. Latyshev, D. V. Prishchepa

Designing the parameters of technology of development of mineral deposits is based on rock properties, usually determined in laboratory conditions on the samples of small volume. When considering the processes involving significant amounts of rock one should account for the scale effect. Applied to strength characteristics of rocks, this effect consists in nonlinear decrease in strength with an increase in volume, and its assessment bases on the statistics of extreme values determined by the probability nature of crack distribution by size. Based on the method of fluorescent inspection, authors studied the characteristics of the fracture structure of rocks. Authors found out that Cauchy distribution describes the probability characteristics of cracks. Taking into account the parameters of this distribution, authors suggest the equation of scale effect, which takes into account the heterogeneity of fractured structure of rocks. One can find the results of experimental studies showing adequacy of the proposed method for evaluating the scale effect. The results allow evaluating strength of the rock mass of various volumes in designing the processes of mining technology.

Keywords: observation station of areal type; reverse linear resection; indirect trigonometric leveling; areal graph of displacement velocities; shear velocity.

 

REFERENCES

1. Koyfman M. I. 1963, Mekhanicheskie svoystva gornykh porod [Mechanical properties of rocks], Moscow, pp. 73–84.
2. Chirkov S. E. 1969, Vliyanie masshtabnogo faktora na prochnost' ugley [Influence of the scale factor on the strength of coal], Moscow, 151 p.
3. Griffith A. A. 1924, The theory of rupture. Proceedings of the first International Congress for Applied Mechanics, Delft, pp. 55–63.
4. Sadovskiy M. A., Golubeva T. V., Pisarenko V. F., Shnirman M. G. 1984, Kharakternye razmery gornoy porody i ierarkhicheskie svoystva seysmichnosti [The characteristic dimensions of the rock and hierarchical properties of seismicity]. Izv. AN SSSR. Fizika Zemli [Proceedings of the USSR Academy. Physics of the Solid Earth], no. 2, pp. 3–15.
5. Latyshev O. G., Kornilkov M. V. 2015, Issledovanie treshchinnoy struktury gornykh porod kak fraktal'nogo ob’ekta [Study of fracture structure of rocks as a fractal object], Saarbrücken, 156 p.
6. Glushko V. T., Kirnichanskiy G. T. 1974, Inzhenerno-geologicheskoe prognozirovanie ustoychivosti vyrabotok glubokikh ugol'nykh shakht [Engineering and geological forecasting of sustainability of workings in deep coal mines], Moscow, 176 p.
7. Gumbel' E. 1965, Statistika ekstremal'nykh znacheniy [Statistics of extreme values], Moscow, 452 p.
8. Glushko V. T., Borisenko V. G. 1978, Inzhenerno-geologicheskie osobennosti zhelezorudnykh mestorozhdeniy [Geotechnical characteristics of iron ore deposits], Moscow, 254 p.
9. Latyshev O. G. 2007, Razrushenie gornykh porod [Destruction of rocks], Moscow, 672 p.

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