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ISSN 0536-1028 (Print)              ISSN 2686-9853 (Online)  

Mirenkov V. E. – Institute of Mining, the Siberian Branch of RAS, Novosibirsk, the Russian Federation.
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It is well known that the bigger the working radius, the higher the possibility of fracture initiation is. The main explanation
is that the bigger the cross sectional area of the working, the higher the quantity of faults is, which lead to fracturing.
Usually stress-strained state calculation is fulfilled without taking rock dead weight into account, which increases stresses,
which initiate fracturing. For isotrope rock massif, which is weakened, for example, by the working with circular cross-
30 «Известия вузов. Горный журнал», № 3, 2017 ISSN 0536-1028
section, during radius proportional change or boundary conditions dimensionless values are used. The change in the
radius of the working only, consequently changes the position of isolines of stressed-strained state; at that values are
preserved. Whereas the change of boundary stresses conditions only preserves the geometry, proportionally changing
the values. Phenomenological theory is suggested, which allows taking into account enclosing rock dead weight when
calculating deformation in the vicinity of a working.
Key wods: working; blasthole; fracturing; rock weight; stresses; phenomenological theory.
REFERENCES
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2. Rabotnov Iu. N. Lektsii po teorii uprugosti [Lectures on elasticity theory]. Moscow, MSU Publ., 1967. 155 p.
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Department of Technical Sciences, 1942, no. 7–8, pp. 13–28. (In Russ.)
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the USSR. Department of Technical Sciences, 1955, no. 11, pp. 73–86. (In Russ.)
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6. Kurlenia M. V., Mirenkov V. E. Metody matematicheskogo modelirovaniia podzemnykh sooruzhenii [The method of
mathematical modeling of underground constructions]. Novosibirsk, Nauka Publ., 1994. 188 p.
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uchebnykh zavedenii. Gornyi zhurnal – News of the Higher Institutions. Mining Journal, 2016, no. 6, pp. 55–62. (In
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