Nasirov U. F., Ochilov Sh. A. – Tashkent State Technical University, Tashkent, Republic of Uzbekistan.
Е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Ravshanova M. Kh. – Navoiy State Mining Institute, Navoiy, Republic of Uzbekistan. Е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The article examines the mechanism of hard rock crushing when blasting high benches with double contiguous downhole
explosive charges. It is determined that stress field parameters, which are determined by blasting impulse shape and
stress components distribution at various distances from the explosion, influence greatly the character of medium
breaking when applying impulse loads to it. Significant change in total stresses under fixed conditions of blasting is
observed when blasting the groups of double contiguous downhole explosive charges, positioned linearly. Experimental
data are obtained of the dependence of oversize material output percentage on the stress intensity. It is determined that
the use of double contiguous downhole explosive charges conditions on the significant increase in the distance between
separate bunches of wells in a line. In certain mining-geological conditions the method of blasting double contiguous
downhole explosive charges is efficient only under certain wells diameters.
Key words: drilling and blasting operations; double contiguous downhole explosive charges; stress field parameters;
explosive charges shape change; rock crushing; plane front forming; plane wave front.
REFERENCES
1. Norov Iu. D., Bibik I. P., Norov Zh. A., Nasirov U. F., Normatova M. Zh. [Blasting works in complex hydrogeological
conditions]. Gornyi zhurnal – Mining Journal, 2013, no. 8(1), pp. 30–31. (In Russ.)
2. Norov Iu. D., Nasirov U. F., Umarov F. Ia., Zairov Sh. Sh. [New progressive technological solutions for cyclical and
continuous method at Muruntau open pit]. Izvestiia Kyrgyzskogo gosudarstvennogo tekhnicheskogo universiteta im.
I. Razzakova – Journal of Kyrgyz State Technical University named after I. Razzakov, 2014, no. 33, pp. 245–248.
3. Shemetov P. A., Nasirov U. F., Ochilov Sh. A. [Analysis of the technological scheme of mining development at
Muruntau open pit]. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal – News of the Higher Institutions. Mining
Journal, 2015, no. 1, pp. 23–27. (In Russ.)
4. Pastikhin D. V., Tolipov N. U., Zairov Sh. Sh. [Rational construction substantiation of a highwall at the Eastern
section of Muruntau open pit]. Gornyi zhurnal – Mining Journal, 2013, no. 8(1), pp. 39–42. (In Russ.)
5. Nasirov U. F., Umarov F. Ia. [Calculating contiguous downhole explosive charges under preliminary fissure generation
of deep open pits slopes]. Gornyi vestnik Uzbekistana – Mining News of Uzbekistan, 2016, no. 2, pp. 16–20. (In Russ.)
6. Norov Iu. D., Shemetov P. A., Zairov Sh. Sh., Tukhtashev A. B. Sovershenstvovanie metodov upravleniia drobleniem
gornykh porod vzryvom: monografiia [Monograph “Rock blasting crushing control methods development”]. Bukhara,
Bukhoro Publ., 2011. 200 p.
7. Nasirov U. F. [Development of gas bubble of artificially buried linear pin-point blasting charge under the generation
of extended mining]. Gornyi informatsionno-analiticheskii biulleten (nauchno-tekhnicheskii zhurnal) – Mining
Informational and Analytical Bulletin (scientific and technical journal), 2010, no. 6, pp. 50–52. (In Russ.)
8. Norov Iu. D., Zairov Sh. Sh., Ivanovskii D. S. [Theoretical investigation into the regularities of cylindrical charge
acting in rocks of various strength of embedded deposits]. Gornyi informatsionno-analiticheskii biulleten (nauchnotekhnicheskii zhurnal) – Mining Informational and Analytical Bulletin (scientific and technical journal), 2010, no. 4,
pp. 140–142. (In Russ.)
9. Norov Iu. D., Bibik I. P., Zairov Sh. Sh. [Efficient parameters control for drilling and blasting operations by the
criterion of exploded rock mass quality]. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal – News of the Higher
Institutions. Mining Journal, 2016, no. 1, pp. 87–93. (In Russ.)
Ershova T. L., Bedrina S. A. – The Ural State Mining University, Ekaterinburg, the Russian Federation. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Urban utility system requires constant development and perfection. Additional utility loads as the consequence of cities
extension as well as their unsatisfactory engineering condition lead to serious technical and engineering and environmental
problems in medium and big cities. Within modern conditions design solutions as far as the development of urban utility
is concerned require greater attention, together with the solution of industrial engineering problems, development of
dispute resolution procedure and disagreement resolution when getting approvals over the linear constructions crossing
land lots. Creation of a single monitoring system for local utilities will allow avoiding a lot of emergency situations and
expenditure on mitigation of consequences.
Key words: utility system; network technical state; engineering and environmental problems; teleinspection; utility network
monitoring; smart city.
REFERENCES
1. Samoilov V. S., Levadnyi V. S. Vodosnabzhenie, vodootvedenie. Skvazhiny, kolodtsy, kanalizatsiia [Water supply,
water disposal. Drilling holes, wells, sewerage system]. Available at: http://science.totalarch.com/book/0928.rar
(acessed 12th October, 2016)
2. Eremkin A. I., Koroleva T. I., Danilin G. V. and other. Ekonomika energosberezheniia v sistemakh otopleniia,
ventiliatsii i konditsionirovaniia vozdukha [Energy saving economy within heating systems, and air ventilation and
conditioning systems]. Moscow, ASV Publ., 2008. 184 p.
3. Finogeev A. G., Bozhdai A. S., Bogatyrev V. E. [Formalization of methodology and principles of solution making
according to the results of Housing and Communal Services utility monitoring]. Otkrytoe obrazovanie – Open
Education, 2011, no. 2(86), p. 2, pp. 210–214. (In Russ.)
4. Dolgikh E. I., Antonov E. V., Erlich V. A. [Smart cities: prospects for development in Russia]. Urbanistika i rynok
nedvizhimosti – Urban Studies and the Real Estate Market Journal, 2015, no. 1, pp. 50–61. (In Russ.)
Solov'ev V. A., Aptukov V. N., Tarasov V. V. – Ural Research and Development Institute of Halurgy (Galurgia JSC),
Perm, the Russian Federation. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Kotliar E. K. – Uralkali PJSC, Berezniki, Perm region, the Russian Federation. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
General facts are introduced about the support state in mine shafts intersections with adjoining mine workings in saliferous
rocks in the process of their exploitation in mines of Verkhnekamskoye deposit of potassium salts. The directions of
intersections protection are examined at the stage of design and construction of mining enterprises with the choice of
mine shafts site and dimensional layout drawings of neighboring workings of shaft bottom (dosing chambers, loading and
ventilation workings) with their parameters estimation. With the use of licensed ANSYS software mathematical modeling
of different variants of adjoining mine workings arrangement and parameters is fulfilled. The character of temporal
changing of the quantity of support pressure and hoop stress in concrete support of intersections is determined. It is
stated that the most acceptable variant of intersections support is one-level arrangement of dosing chambers and the
presence of a yielding layer in intersections support with rating 0.3–0.4 m, made of foam polystyrenes of “Penoplex Roof”
type (“Penoplex-35”). Engineering solutions examined and recommended are implemented in construction plans of nine
mine shafts at Verkhnekamskoye deposit of potassium salts.
Key words: saliferous rocks; mine shafts; mine shafts intersections; three-layer support; yielding layer.
REFERENCES
1. Konstantinova S. A., Kramskov N. P., Solov'ev V. A. Nekotorye problemy mekhaniki gornykh porod primenitel'no k
otrabotke almaznykh mestorozhdenii Iakutii [Some problems of rocks mechanics as applied to Yakutia diamond deposits
mining]. Novosibirsk, Nauka Publ., 2011. 223 p.
2. Konstantinova S. A., Kul'minskii A. S., Solov'ev V. A. [Some peculiarities of saliferous rocks deformation around
permanent mine openings]. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal – News of the Higher Institutions.
Mining Journal, 2007, no. 1, pp. 57–62. (In Russ.)
3. Gukhman V. D., Konstantinova S. A., Kramskov N. P., Kul'minskii A. S., Solov'ev V. A. [Some results of permanent
mine openings and permanent headings condition monitoring at mine “Internatsionalny”]. Gornyi zhurnal – Mining
Journal, 2006, no. 8, pp. 80–83. (In Russ.)
4. Solov'ev V. A., Aptukov V. N., Konstantinova S. A., Sekuntsov A. I. [Means of providing stability of mine shafts with
adjoining mine workings in saliferous rock massifs ]. Gornyi zhurnal – Mining Journal, 2013, no. 7, pp. 53–56.
(In Russ.)
Mirenkov V. E. – Institute of Mining, the Siberian Branch of RAS, Novosibirsk, the Russian Federation.
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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
1. Novozhilov V. V. Teoriia uprugosti [Elasticity theory]. Leningrad, Sudpromgiz Publ., 1958. 370 p.
2. Rabotnov Iu. N. Lektsii po teorii uprugosti [Lectures on elasticity theory]. Moscow, MSU Publ., 1967. 155 p.
3. Mikhlin S. G. [Regarding the stresses within rocks over the coal bed]. News of the Academy of Sciences of the USSR.
Department of Technical Sciences, 1942, no. 7–8, pp. 13–28. (In Russ.)
4. Barenblatt G. I., Khristianovich S. A. [Regarding roof collapse during mining]. News of the Academy of Sciences of
the USSR. Department of Technical Sciences, 1955, no. 11, pp. 73–86. (In Russ.)
5. Johan Cluasen. Bearing conacity of circular footing on a Hork-Brown material. Int. Journal Rock Mech. Min. Sci.,
2013, vol. 57, pp. 34–41.
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.
7. Mirenkov V. E. [Deformation calculations, rock dead weight and poorly conditioned problems]. Izvestiya vysshikh
uchebnykh zavedenii. Gornyi zhurnal – News of the Higher Institutions. Mining Journal, 2016, no. 6, pp. 55–62. (In
Russ.)
8. Gritsko G. I., Posokhov G. E. and others. Gornoe davlenie na moshchnykh krutykh plastakh [Mining pressure at
powerful steep beds]. Novosibirsk, Nauka Publ., 1967. 215 p.
Biriuchev I. V., Zubkov A. V. – The Institute of Mining of the Ural Branch of RAS, Ekaterinburg, the Russian
Federation. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The present work suggests some activities which allow reducing the level of stressed-strained state within constructive
elements of a development system when recovering reserves of a deposit under interstage pillar by means of creating
protective zone with the help of the two panels in footwall and side wall. The actions are based on the principle of stresses
distribution within constructive elements of development by means of generating sharp angles in panels roof and bottom,
which concentrate maximum compressive stresses, therefore unloading bottom and future chambers roof mine working.
The given activities significantly simplify chamber reserves recovering inside the protective zone and allow stoping
practically any chamber development system with any number of fronts, and also give the possibility of controlling the
values of mining and carry out selective mining. The suggested solutions are examined by the example of Gayskoye
deposit.
Key words: protective zone; chamber development system; rock pressure control; stressed-strained state; stresses
concentration.
REFERENCES
1. Zubkov A. V. Geomekhanika i geotekhnologiia [Geomechanics and geotechnology]. Ekaterinburg, IM UB RAS
Publ., 2001. 333 p.
2. Vlokh N. P. Upravlenie gornym davleniem na podzemnykh rudnikakh [Rock pressure control at underground mines].
Moscow, Nedra Publ., 1994. 208 p.