Energy consumption of iron ore milling is analyzed. It is emphasized that ore milling aimed to dissociate mineral grains is the most energy-consuming and expensive process in the production chain of concentrate. It is found that stretching of the dynamic impulse improves specific output of milling of explosive rupture products. For the conditions of the Far East ferruginous quartzite deposit with magnetite grains 42–44 μm in size, this trend of extension of rock mass exposure time under explosion wave is highly suitable. Wave pre-failure facilitates rock crushing down to standard quality size. Rocks subjected to explosive pre-rupture consume less energy in milling. Under multiple cyclic effect produced on rocks and ore body by stress waves of subsequent blasting with longer delays for better fracturing, it is possible to achieve selective dissociation of magnetite grains at the same explosive consumption. From the results of five years-long experience of rock shattering by blasting at increased delay intervals to 150–200 ms, it is found that the increased delay intervals in successive blasting of holes enable a 5–7 time increase in exposure time of rock mass under multiple alternative loads, first of all, under tensile stresses. For the conditions of alternations of iron ore and overburden areas, it is suggested to carry out blasting with pre-failure zone generation with modeling large scale blast propagation in space and time for the specific blast pattern.

For citation: Leschinsky A. V., Shevkun E. B., Lysak Yu. A. Control of iron ore fragmentation by blasting—way of improvement of processing efficiencyGornyy informatsionno-analiticheskiy byulleten'. 2019;4:41-52. [In Russ]. DOI: 10.25018/0236-1493-2019-04-0-41-52.


Еxplosive shattering of iron ore, delay interval, milling, concentrate, advance rock fracture, extended delay intervals, single blast holes, joint system formation, compression and tension forces in rocks.

Issue number: 4
Year: 2019
ISBN: 0236-1493
UDK: 622.235: 622.73
DOI: 10.25018/0236-1493-2019-04-0-41-52
Authors: Leschinsky A. V., Shevkun E. B., Lysak Yu. A.

About authors: A.V. Leschinsky (1), Doctor of Technical Sciences, Professor, Assistant Professor, e-mail:, E.B. Shevkun (1), Doctor of Technical Sciences, Professor, Assistant Professor, e-mail:, Yu.A. Lysak, General Director, Open Company «AVT-Amur», e-mail:, 675000, Blagoveshchensk, Russia, 1) Pacific National University, 680035, Khabarovsk, Russia. Corresponding author: A.V. Leschinsky, e-mail:


1. Khopunov E. A. Selektivnoe razrushenie mineral'nogo i tekhnogennogo syr'ya (v obogashchenii i metallurgii) [Selective destruction of mineral and technogenic raw materials (en-richment and metallurgy)]. Ekaterinburg, OOO «UIPTS», 2013, 429 p.

2. Revnivtsev V. I., Gaponov G. V., Zarogatskiy L. P. Selektivnoe razrushenie mineralov. Pod red. V. I. Revnivtseva [Selective destruction of minerals. Revnivtsev V. I. (Ed.)], Moscow, Nedra, 1988, 286 p.

3. Goncharov S. A. Optimization of crushing of ore in the mine — a reserve for increasing the efficiency of the enrichment processing. Gornyy zhurnal. 1988, no 10, pp. 55—57. [In Russ].

4. Gzogyan T. N. Intensifikatsiya protsessov rudopodgotovki i obogashcheniya zhelezistykh kvartsitov na osnove energeticheskikh vozdeystviy [The intensification of the processes of ore preparation and enrichment galesigrained quartzite on the basis of energy impacts], Candidate’s thesis, Moscow, IPKON RAN, 1991, 18 p.

5. Revnivtsev V. I. On the rational organization of the process of disclosure of minerals in accordance with modern concepts of solid state physics. Sovershenstvovanie i razvitie protsessa podgotovki rud k obogashcheniyu. Trudy Mekhanobra. Issue 140. Leningrad, 1975, pp. 153—168. [In Russ].

6. Chanturia V. A. Modern problems of mineral raw material enrichment in Russia. Obogashchenie rud. 2000, no 6, pp. 3—8. [In Russ].

7. Odintsev V. N. Evaluation of the influence of pressure in the explosion cavity on pre-drasudenie rocks. Vzryvnoe delo. 2016, no 115/72, pp. 5—17. [In Russ].

8. Kochanov, A. N., Odintsev, V. N. Theoretical estimation of the radius of the area of rock pre-destruction in a camouflage explosion. Vzryvnoe delo. 2015, no 113/70, pp. 41—54.

9. Khalkechev R. K., Khalkechev K. V. Control of selectivity of damage during the crushing and grinding of rocks on the basis of methods of similarity and dimensionality in the dynamics of cracks. Gornyy zhurnal. 2016, no 6, pp. 64—66. [In Russ].

10. Momeni A., Karakus M., Khanlari G. R., Heidari M. Effects of cyclic loading on the mechanical properties of a granite. International Journal of Rock Mechanics and Mining Sciences. Vol. 77, July 2015, Pp. 89—96.

11. Xiaodong Fu, Qian Sheng, Yonghui Zhang, Jian Chen. Application of the discontinuous deformation analysis method to stress wave propagation through a one-dimensional rock mass. International Journal of Rock Mechanics and Mining Sciences. Vol. 80. December 2015, Pp. 155—170.

12. Аkаndе J. М., Lawal А. I. Optimization of Blasting Parameters Using Regression Models in Ratcon and NSCE Granite Quarries. Ibadan, Оуо State, Nigeria. Geomaterials. 2013. Vol. 3. No 1. Рp. 28—37.

13. Haeri H., Shahriar K., Fatehi Marji M., Moarefvand P. Experimental and numerical study of crack propagation and coalescence in precracked rock-like discs. International Journal of Rock Mechanics and Mining Sciences. 2014. Vol. 67. Pp. 20—28.

14. Liu T., Cao P., Lin H. Damage and fracture evolution of hydraulic in compressionshear rock cracks. Theoretical and Applied Fracture Mechanics. 2014. Vol. 74. Pp. 55—63.

15. Shevkun E. B., Leshchinskiy A. V., Lysak Yu. A., Plotnikov A. Yu. Features explosive loosening with extended intervals of delay. Gornyy informatsionno-analiticheskiy byulleten’. 2017, no 4, pp. 272—282. [In Russ].

16. Mityushkin Yu. A., Lysak Yu. A., Plotnikov A. Yu., Ruzhitskiy A. V., Shevkun E. B., Leshchinskiy A. V. Optimization of blasting parameters with increase in intervals of delay. Gornyy informatsionno-analiticheskiy byulleten’. 2015, no 4, pp. 341—348. [In Russ].

17. Yurovskikh A. V. Razrabotka modeli razrusheniya gornykh porod na kvazistaticheskoy stadii deystviya vzryva [Development of a model of fracture of rocks on quasistatic-tion stage of explosion], Candidate’s thesisSaint-Petersburg, 2003, 119 p.

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