2019-6-1

DOI: 10.21440/0536-1028-2019-6-5-13

Sokolov I. V., Rozhkov A. A. Investigating the parameters of dispersion in the plane system of charges at granular quartz deep mining. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal Gornyi zhurnal = Mining Journal. 2019; 6: 5–13. DOI: 10.21440/0536-1028-2019-6-5-13

Introduction. There is much concern about raw material overgrinding as a result of blasting when mining granular quartz. The main blasting method of deep mining is borehole blasting with rings of continuous charges. The main drawbacks of the method include nonuniform distribution of explosives along the plane of the broken layer and the fact that the significant energy of continuous charges is spent on the shattering effect which automatically overgrinds the material in the area nearest the blast. Research aim is to develop the technology of blasting and optimize its parameters ensuring the reduced output of overgrinded quartz fraction.
Methodology includes the development and application of a mathematical model of drilling and blasting parameters forecast in granular quartz deep mining.
Research concept. A technology of breaking has been proposed by way of solution to the given problem. The technology lies in the concept that the uniformity of explosive energy concentration distribution in the broken layer is ensured by charges dispersion by air gaps and the particular order of their arrangement in the plane of the ring. To implement the technology, a method of forming dispersed charges in deep upholes has been developed; the method does not require additional efforts and equipment.
Results. A special technique has been created, which makes it possible to determine the parameters of dispersion ensuring the relevant specific consumption of explosives along the whole plane of the broken layer. The dependence between the output of the overgrinded quartz fraction and the parameters of dispersion in the plane system of charges has been determined. Engineering and economic evaluation of breaking technology options has been carried out as compared to the conventional one. Potential economic benefit has been estimated from the developed technology application for 1t of produced ore.

Key words: granular quartz; blasting; dispersed charge; borehole ring; air gap; specific consumption of explosives.

1. Brodskaia R. L., Gettse I., Kotova E. L., Khaide G. Evolution of individuals and aggregates of the
vein quartz in deposits of Kyshtym region (the Urals). Zapiski Rossiiskogo mineralogicheskogo obshchestva =
Geology of Ore Deposits. 2015; 144 (1): 93–100. (In Russ.)
2. Götze J., Pan Y., Müller A., Kotova E. L., Cerin D. Trace element compositions and defect structures
of high-purity quartz from the Southern Ural Region, Russia. Minerals. 2017; 7: 189.
3. Baranovskii K. V., Kharisova O. D. Assessment of actual ore losses and dilution based on laser
scanning data at underground mining. Izvestiia Tulskogo gosudarstvennogo universiteta. Nauki o Zemle =
Proceedings of the Tula State University. Earth Sciences. 2018; 4: 135–147. (In Russ.)
4. Mitiushkin Iu. A., Lysak Iu. A., Plotnikov A. Iu., Ruzhitskii A. V., Shevkun E. B., Leshchinskii A. V.
Optimization of parameters of explosive works increase in intervals of delay. Gornyi informatsionnoanaliticheskii
biulleten (nauchno-tekhnicheskii zhurnal) = Mining Informational and Analytical Bulletin
(scientific and technical journal). 2015; 4: 341–348. (In Russ.)
5. Kazakov N. N. Parameters of process of camouflage action of explosion of a hole charge of final
length. Gornyi informatsionno-analiticheskii biulleten (nauchno-tekhnicheskii zhurnal) = Mining
Informational and Analytical Bulletin (scientific and technical journal). 2013; S1: 109–119. (In Russ.)
6. Onederra I. A., Furtney J. K., Sellers E., Iverson S. Modelling blast induced damage from a fully
coupled explosive charge. International Journal of Rock Mechanics and Mining Sciences. 2013; 58: 73–84.
7. Sokolov I. V., Smirnov A. A., Rozhkov A. A. Efficiency improvement of quartz production by mean
of using two-dimensional system of distributed charges. Izvestiya vysshikh uchebnykh zavedenii. Gornyi
zhurnal = News of the Higher Institutions. Mining Journal. 2018; 1: 56–65. (In Russ.)
8. Gorinov S. A., Smirnov A. A. Blasting effect from the plane system of explosive charges when
breaking rock massif. Gornyi informatsionno-analiticheskii biulleten (nauchno-tekhnicheskii zhurnal) =
Mining Informational and Analytical Bulletin (scientific and technical journal). 2001; 4: 42–50. (In Russ.)
9. Yue Z. W., Yang R. S., Chen G., Pan C. C., Meitan X. Dynamic test on siltcharge blasting of air-deck
charge. Journal of the China Coal Society. 2011; 36(3): 398–402.
10. Leshchinskii A. V., Shevkun E. B. Dispersion of borehole charges. Khabarovsk: PNU Publishing;
2009. (In Russ.)
11. Yue Z. W., Yang R. S., Chen G., Pan C. C., Meitan X. Dynamic test on siltcharge blasting of airdeck
charge. Journal of the China Coal Society. 2011; 36(3): 398–402.
12. Bondarenko I. F. et al. Drilling and blasting at kimberlite pipes of Yakutia. Ekaterinburg: IM UB
RAS Publishing; 2017. (In Russ.)
13. Yang G. L., Yang R. S., Jiang L. L. Pressure distribution along borehole with axial air-deck charge
blasting. Explosion and Shock Waves. 2012; 32: 653–657.
14. Smirnov A. A., Rozhkov A. A. Investigation of the action of the explosion of the ring borehole
pattern. Vzryvnoe delo = Explosion Technology. 2018; 119-76: 118–128. (In Russ.)
15. Latyshev O. G., Petrushin A. G., Azanov M. A. Commercial explosives. Ekaterinburg: UrSMU
Publishing; 2009. (In Russ.)

 

Language

E-mail

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

 

 

счетчик посещений