/

 

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

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.)

Language

E-mail

This email address is being protected from spambots. You need JavaScript enabled to view it.

Мы индексируемся в: