"Explosion technology"— scientific and technical journal

Journal was founded in 1922 by a group of engineers. In Russia and the CIS "Explosion technology" is the only one peer-reviewed specialized periodical in the field of blasting.

Issue 127/84 (2020)

Theory and practice of blasting work

Brief view
 Article title
Title and imprint
Opening remarks by the chief editor K.N. Trubetskoy

Section 1. State and improvement of explosives, devices and blasting agents
UDC 622.235.5
S.A. Kondratyev, Chief Executive Officer
(JSC «NMZ «Iskra», Novosibirsk, Russia)
А.A. Sysoev, Professor, Doctor of Technical Sciences
I.B. Katanov, Doctor of Technical Sciences
(KuzSTU named after T.F. Gorbachev, Kemerovo, Russia)

Effect of charge dispersion on the intensity of seismic impact when using non-electric detonators in quarries

Keywords:mass explosion, means of initiation, seismic impact, downhole charge, displacement rate

The possibility of using the probabilistic method to predict the distribution of the total mass of the explosive at the full time of the explosion was shown by comparing seismograms of the displacement rates in experimental explosions with the calculated histogram of the distribution of the explosive total mass in the initiation intervals. The maximum number of charges in the group falling within the 20 MS interval was used as comparison criteria. In developing the issue of controlling the seismic effect of the explosion, the article, based on the probabilistic model, presents a comparison of the distribution density of the total explosive mass over the entire interval of the explosion when using solid and dispersed borehole charges initiated by non-electric detonators.

Bibliographic list:
  1. Rubtsov S.K. Comparative analysis of non-electric detonators use at mining enterprises / S. K. Rubtsov [et al.] / / Mining Bulletin ofUzbekistan. – 2005. – No. 2. – Pp. 61–65.
  2. Sysoev A.A. Analysis of systems for initiating downhole charges in open pits// Bulletin of higher educational institutions. Mining Journal.– 2016. No. 4. P. 60-67.
  3. Sysoev A.A. Experimental-industrial verification of probabilistic model of short-delayed initiation of the system of borehole charges A.A. Sysoev, I.B. Katanov, S.A. Kondratyev. // Blasting. – 2019. No. 125/82. – Р. 5-16.
  4. Sysoev A.A. Comparative evaluation of pyrotechnic and electronic blasting caps based on probabilistic models of the initiation system of the downhole charge / A.A. Sysoev, S.A. Kondratyev, I.B. Katanov // Blasting. – 2020. No. 126/83 – Р. 85-99.
  5. Kondratyev S.A. Analysis of the results of factory tests of the device «Iskra» for initiation of borehole charges / S.A. Kondratуev, A.A. Sysoev , I.B. Katanov // Bulletin of the Kuzbass state technical University. – 2019. No. 6, P. 72-78.
  6. Leshchinsky A.V. Dispersion of borehole charges / A.V. Leshchinsky, E.B. Shevkun. – Khabarovsk : publishing house of the Pacific. state University.– 2009.–154 p.
  7. Gemba V.I. Seismic effect of explosion of a charge dispersedby air gap // Proc. scientific. works. Magnitogorsk mining Institute named after T. N. Nosov. – 1975. Vol. 151. – P. 77-83.
  8. Federal norms and rules of industrial safety. Rules of safety during the explosive works: collection of documents. Series 13.Release 14. – M.: Joint stock company «Scientific and technological research center of for industrial problems safety». 2014. – 332 p. (with amendments dated November 30, 2017 No. 518).
  9. Peters K.I. Experience in reducing seismic impacts on the environment and population in the production of mass explosions in the branches of JSC «Kuzbassrazrezugol» / Bulletin of the national research center For industrial and environmental safety. – No. 3. – 2018. – P. 81-87.
  10. Kokin S.V. Control of mass explosion parameters / Kokin, S. V., Parkhomenko, D. M., Berwin, A.V. / / Blasting. – 2019. No. 125/82. – Р. 39-52.
  11. Grib N.N. Analysis of seismic effects from mass explosions of open pit «Neryungrinskiy» / N. N. Grib, A. Y. Pazynich. // Modern problems of science and education. – 2010. – No. 1. – P. 71-76.
  12. Onika S.G. Modern state of methods for prediction of seismic explosions in open-pit mines V.S. Voitenko, F.G. Khalyavkin/ / Mining mechanics and mechanical engineering – Minsk. – No. 1, – 2012. – P. 28-33.
  13. Goncharov A.I. Seismic impact of explosions in mines and quarries / A.I. Goncharov, V.I. Kulikov, A.A. Eremenko / / ISSN 0135-3500. Notes of the Mining Institute. – Vol. 171, – 2007. –P. 175-180.
  14. Kondratyev S.A. Modern means of initiation of JSC «NMZ «Iskra».S.A. Kondratyev, S.A. Pozdnyakov, A.S. Ivanov, K.A. Vandakurov // Blasting. – 2019. – No. 123/80. – P. 136-144.
  15. Katanov I.B. Blasting in quarries: tutorial / I. B. Katanov, A. A. Sysoev //KuzGTU. – Kemerovo, 2019. – 200 p.
UDC 622.235.5
S.A. Gorinov, doctor of technical sciences, scientific consultant
I.Yu. Maslov, candidate of technical sciences, chief engineer
(LLC «Global Mining Explosion-Russia»)

Marking of water-containing explosives with rare earth element

Keywords:marking, rare earth elements (REE), mass spectrometer, REE concentration

The paper considers the basics of using rare earth elements (REE) for marking water-containing EXPLOSIVES. it is Shown that the number of combinations for marking can be provided by varying the type of metal and its concentration. The total number of combinations when using the available 10 REE and applying three levels of concentration is 59049, which is quite enough for the needs of the Customs Union.
Estimates of economic costs have shown that the total cost of the proposed method of marking emulsion explosives (EE) will be a maximum of 0.025$ / kg, which economically allows it to be implemented in practice. A method for measuring the mass fraction of REE in emulsion explosives is proposed and its applicability for reliable measurement of the mass fraction of REE at concentrations of 0.1 mg/kg. The proposed marking method and measurement method can be recommended for industrial testing.

Bibliographic list:
  1. Technical regulations of the customs Union TR CU 028/2012 «On the safety of explosives and products based on them» /Adopted by the Council of the Eurasian Economic Commission from 20.07.2012, No. 57 (changes from 13.03.2017, No. 11).
  2. Krainov S.R. Geochemistry of rare elements in underground waters (in connection with geochemical search for deposits). – M.: Nedra, 1973. – 296 P.
  3. Kharitonova N.A. Rare Earth elements in surface waters of the Amur region. Features of accumulation and fractionation / Kharitonova N.A., Vakh E.A. // Bulletin of Tomsk state University. – 2015. – No. 396. – Pp. 232-244.
  4. Chudaeva V.A. Behavior of rare earth elements in conditions of mixing of waters of different types (Kunashir island, Kuril Islands) / Chudaeva V.A., Chudaev O.V. // Pacific Geology. – 2010. – V. 29. – No. 2. – Pp. 97-111.
  5. Chudaeva V.A. Features of the chemical composition and suspensions of Primorye rivers / chudaeva V.A., Chudaev O.V. // Pacific Geology. – 2011. – V. 30. – No. 2. – Pp. 104-122.
  6. Chudaeva V.A. Features of accumulation and fractionation of rare earth elements in the surface waters of the Far East under conditions of natural and anthropogenic anomalies /Chudaeva V.A., Chudaev O.V. // Geochemistry. – 2011. – No. 5. – Pp. 523-549.
  7. Guseva N.V. The Prevalence of rare earth elements in the natural waters of Khakassia / Guseva N.V., Kopylova Yu.G., Leushina S.K. // Izvestiya Tomsk Polytechnic University. – 2013. – V. 322. – No. 1. – Pp. 141-146.
  8. Popov V.K. Rare-Earth elements in the underground waters of the Tomsk water intake / Popov V.K., Pasechnik E.Yu., Protsenko P.I., Goncharov O.Yu. // Izvestiya Tomsk Polytechnic University. Geo-resource engineering. – 2018. – V. 329. – No. 6. – Pp. 97-105.
  9. Borzenko S.V. Distribution of rare earth elements in the waters and bottom sediments of mineral lakes in Eastern Transbaikalia (Russia) / Borzenko S.V., Zamana L.V., Zarubina O.V. // lithology and minerals. – 2017. – No. 4. – Pp. 306-321.
  10. Kramchaninov N.N., Petin A. N., Pogoreltsev I.A. Analysis of the state of underground waters of the mining district of the KMA on the territory of the Belgorod region // Scientific Vedomosti of the Belgorod state University. Series: Natural Sciences. – 2011. – V. 15. – No. 9. – Pp. 166-172.
  11. Vakh.E.A. The Content of rare earth elements in the waters of the zone of hypergenesis of sulfide ores of the Berezite Deposit / Vakh E.A., Vakh A.S., Kharitonova N.A. // Pacific Geology. – 2013. – V. 32. – No. 1. – Pp. 105-115.
  12. Abdrakhmanov R.F. Features of Geochemistry of rare elements in natural and technogenic formations of the southern Urals / Abdrakhmanov R.F., Akhmetov R.M. // Geological collection. – 2015. – No. 12. – Yeah. 215-222.
  13. Tinsel.A. Influence of natural and technogenic factors on the formation of hydrotechnical formations on the territory of GOK /Mishurina O. A. // International journal of applied and fundamental research. – 2016. – No. 12. – Pp. 82-85.
  14. Kharitonova N.A. Rare earth elements in underground waters of high pressure CO2 from Volcanic-sedimentary rocks of the Sikhote-Alin ridge. Russia / Kharitonova N.A., Chelnokov G.A., Vakh E.A. // Global groundwater resources and management / REL. ed. – Jodhpur: Scientific Publishers (India). – 2010. – Pp. 311-329.
  15. Martin D.M. Rare elements of nutrition to the ocean / Martin D.M., Högdahl O.T., Filippo Y.S. // Journ Ingoda. Rez. – 1976. – V. 81. – Pp. 3119-3124.
  16. Viers J. Chemical composition of suspended sediments in rivers of the world: new data from a new database / Viers J., Dupre B., Gaillardet J. // Science of the Total Environment. – 2009. – V. 407. – Pp. 853-868.
  17. Hannigan R.E. Development of enrichment of medium-earth rare-earth elements in freshwater weathering of phosphate minerals / Hannigan R.E., Sholkovich E.R. // Chemistry. Geology. 2001. – V. 175. – Pp. 495-508.
  18. Johannesson K. Rare earth elements as geochemical indicators of regional mixing of ground water / Johannesson K., Stechenbach K., Hodge V. // Geochim. I. Cosmochim. Act's. – 1997. – V. 61. – Pp. 3605-3618.
  19. Meller P. Rare earth elements and yttrium in mineral and geothermal waters / Meller P., Dulsky P. // Proc. in proc. «Geochemistry of the earth's surface». Balkema. – 1999. – Pp. 527-530.
  20. Meller P. Distribution of rare earth elements and yttrium in the interaction of water and rocks: field observations and experiments // Interaction of water and rocks / ed. Stober I., Bucher K.-Rotterdam: Kluwer Acad. Click. – 2002. – Pp. 97-123.
UDC 622.235.5
L.B. Mashkinov, research associate
(FGBUN Institute of structural Macrokinetics and problems of materials science RAS, Chernogolovka, Russia)

Initiator of detonation of gas-free mixtures

Keywords:initiator of detonation of gas-free mixtures, circuit, capacitor, resistance, wire

A device for initiating the detonation of gas-free mixtures based on the «explosion» (evaporation) of the fuse wire is considered. The proposed schematic diagram of the initiation device is carried out.

Bibliographic list:
  1. Gordopolov Yu. A., Denisova N. A., Poletaev A.V., Trofimov V. S. On the detonation of a stoichiometric mixture Zn-S. SB. Explosive case no. 106/63, 2011, P. 3-16
UDC 625.235
V.A. Belin, professor, PhD, President of Autonomous Non-Commercial Organization The National Organization of Engineers Blasters in support of Professional Development, member of Public Council
(NITA Mining institute MISIS, Moscow)

Studies of the quality of blasting operations with the use of emulsion explosives

Keywords:well, charge of emulsion explosives, detonation speed, charge initiation, intermediate detonator, cap detonator, mass explosion, mountain weight, ecological influence

In this article questions of tool measurement of detonation processes in borehole charges of emulsion explosives for an assessment quality of explosive works are considered. As a result of the conducted researches numerous cases of break of a detonation borehole a charge of industrial emulsion explosives were found. Thus depth of wells changed from 16 to 22 meters. In the diameters of explosive wells from 140 to 295 mm. Researches were conducted in the dry and partially flooded wells. Speeds of a detonation of VV on length of wells, concentration of harmful gases in air on an explosion place were investigated, video filming of conducted explosions and photographing of disorders of the blown-up breed was conducted. Thus, in many wells, breaks of a detonation of charges at which the normal detonation excited by the fighter, having taken place some part of a charge were observed, stopped, and the rest of a charge burned out or jumped out of a well. Breaks of a detonation were observed in 69% of wells, is thus lost 30,5% of the lump of the used charges (did not detonate). In 34% of cases break of a detonation was observed in middle part of a charge, in 22% in ground part and in 13% in priustyevy part. In the course of researches it was defined that the local (concentrated) intermediate detonators do not provide creation of conditions for a stable detonation emulsion Centuries. Application in charges of EVV of the extended intermediate detonators like ZKV-B in most cases provides completeness of a detonation of a charge with a speed above, than when using the regular concentrated intermediate detonators.

Bibliographic list:
  1. Overchenko M.N. Influence of mining-geological and technogenic factors on the stability of blast wells in the development of Apatite-nepheline ores /Overchenko M. N., Tolstunov S. A., Moser S. P. / / Saint Petersburg state mining Institute, Saint Petersburg, 2018. Notes of the mining Institute. Volume 231.
  2. Trubetskoy K.N., Zakharov V.N., Viktorov S.D., Zharikov I.F., Zakalinsky V.M. Explosive destruction of rocks during mining // Network periodical scientific publication «problems of subsurface use». – 2014. – № 3. – Pp. 80-95.
  3. Vorobyov V.V., Peev A.M., Slavko G.V. Change in the degree of development of the ledge sole during the interaction of charges with a different shape of the bottom part // Naukovi Herald hricova University: Naukovo-tenny magazine. 2005. no. 3. Pp. 31-33.
  4. Annikov V.E., Akinin N.I., Mikheev D.I., Soboleva L.I., Derzhavets A.S., Brigadin I.V., Doroshenko S.I. On the features of detonation and explosive impact on rocks of powder explosives on a gel basis. / / Gorny information and analytical Bulletin, Moscow, 2015, vol. 12, pp. 318-324.
  5. Viktorov S., Zakalinsky V., Shipovskii I., Mingazov R. About Interaction of Blasting and Geomechanical Processes in Mining. In: Kocharyan G., Lyakhov A. (eds) Trigger Effects in Geosystems. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham, 2019, pp. 417-425.
  6. Zhang ZX Rock fracture and blasting: theory and applications. Elsevier, Oxford, pp 140–141, 2016
  7. Ouchterlony F, Sanchidrián JA, Moser P Percentile fragment size predictions for blasted rock and the fragmentation-energy fan. Rock Mech Rock Eng 50(4):751–779, 2017.
  8. Sanchidrián JA, Ouchterlony F A distribution-free description of fragmentation by blasting based on dimensional analysis. Rock Mech Rock Eng 50(4):781–806, 2017.
  9. Noy MJ Evaluation of a new system algorithm for automated fragmentation measurement from a shovel. In: Spathis AT et al (eds) Proceedings of 11th international symposium on rock fragmentation by blasting (Fragblast 11). The Australasian Institute of Mining and Metallurgy, Carlton, pp 721–726, 2015.
  10. Haibao Yi, Haitao Yang, Li Ming, Han Bin, Zheng Lujing. Study on Open-Pit Precision Control Blasting of Easily Weathered Rock and its Application / 8th International Conference on Physical Problems of Rock Destruction. China, 2014, pp. 157-160.
  11. Technology and safety of blasting operations. V.A. Belin, B.N. Kutuzov, M.I. Ganopolsky et al. – Moscow: Mining; cimmeriyskiy center, 2016. – 424 p.
  12. Method of measuring the speed of detonation of explosives by the reflectometric method using the speed VOD detonation speed meter STO 01.01.004-2011 (company «TLCEngineering-solutionsltd.») / IGD Uro RAS. – Yekaterinburg: Uro RAS, 2011. – 25 p.
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  14. Shchukin Yu.G., Kolominov I.A., Astakhov E.O. Special charges in the technology of zaotkoski ledges in the quarry of JSC "Karelian Okatysh" M.: Mining journal, 2013, no. 10, pp. 86-87
  15. Efremovtsev A.N., Shchukin YU.G., Kolominov I.A., Belin V.A., Togunov M.B., Sapronov E.M. Mezhdunarodnoesotrudnichestvovovzryvnom dele [International cooperation in the explosive case]. Materialy nauchno-prakticheskoj konferentsii «Sovershenstvovanie tekhnologii burovzryvnykh rabot na gorno-rudnykh predpriyatiyakh Kazakhstan», Almaty, 2011, pp. 28-37.

Section 2. Technology of blasting in the mining of solid minerals
UDC 622.236.4:622.271
S.N. Zharikov, Leading researcher, head of the laboratoryDestruction of rocks, Candidate of Engineering Sciences
V.A. Kutuev, Researcher at the laboratory of rock destruction
(Institute of Mining of the Ural branch of the Russian Academy of Sciences IM UB RAS, Ekaterinburg, Russia)

Оn the energy characteristics of the processes of explosive destruction and excavation in open field development

Keywords:destruction of rocks, energy intensity of excavation, drilling and blasting, the relationship between the processes of mining, open mining

The article deals with the relationship between the processes of mineral extraction. The most universal characteristic of the process is its energy intensity. Production technological cycles are considered in the relationship between their energy characteristics, taking into account the recess in the face in time. This approach was largely determined by earlier research in the direction of studying the energy intensity of technological processes. However, the relationship between the energy of explosive destruction and excavation has not been established, although the connection between explosive preparation and the performance of excavating equipment is indicated more than once in the technical literature. This article analyzes previously published materials on establishing relationships between drilling processes and explosive destruction of rock mass. The energy characteristics of dredging operations and explosive destruction are considered. A promising direction for studying technological connections is proposed. Attention is drawn to the fact that the approach to determining the relationships between processes cannot always be monotonous, because in a flat system it is sometimes difficult to express the physical meaning.

Bibliographic list:
  1. Yakovlev V.L. Issledovanie perekhodnyh processov – novoe napravlenie v razvitii metodologii kompleksnogo osvoeniya georesursov (Research of transition processes – a new direction in the development of the methodology of integrated development of geo-resources).Ekaterinburg: UB RAS, 2019. 284 p.
  2. Sadovskij M.A. Izbrannye trudy: Geofizika i fizika vzryva; otv. red. V. V. Adushkin (Selected works: Geophysics and physics of explosion). Moscow: Nauka, 2004, 440 p.
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  13. Kornilkov M.V. Razrushenie gornyh porod vzryvom: konspekt lekcij (Destruction of rocks by explosion: lecture notes). Ekaterinburg: Ural State Mining University, 2008. 202 p.
  14. Zharikov S.N. Energoyomkost' vyemochnyh rabot i ih svyazi s drugimi processami (Energy intensity of dredging operations and their relation to other processes). Izvestiya vysshih uchebnyh zavedenij. Gornyj zhurnal = News of higher educational institutions. Mining journal. 2017. No. 7. pp. 78-86.
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UDC 622.26.016.34
V.I. Lyashenko, PhD. tech. sciences', senior researcher,
A.X. Dudtchenko, Senior Researcher
(Ukrnipipromtehnologii, Zheltye-vody,Ukraine)
O.E. Khomenko, PhD, Professor
(National Technical University «Dnipro Polytechnic», Dnepr, Ukraine)
R.A. Rakhmanov, research fellow, Ph.D. in Engineering
Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences – IPKON RAS, Moscow, Russia)

Improvement of technologies and technical means for drilling and blasting horizontal mine workings in rock massifs

Keywords:rock massifs, technologies and technical means, mine workings, drilling and blasting, safety, efficiency

The article presents the scientific and practical results of the research on improving technologies and technical means for drilling and blasting horizontal workings in rock massifs, based on the results of studying the changing geomechanical, mining and hydro-geological conditions of the field. Methods of generalization, analysis and evaluation of practical experience and scientific achievements in the field of drilling and explosive destruction of solid media, continuum mechanics, mathematical statistics, as well as research methods of wave processes using standard and new methods of leading specialists of developed mining countries of the world with the participation of the authors are described. The conditions for increasing the efficiency of using self-propelled machines and increasing the productivity of the bottom-hole group during drilling and blasting of horizontal mine workings are determined. Testing and introduction in industrial conditions of a prismatic loghouse with a Central «cleaning» spur charge during drilling and blasting of horizontal mine workings was performed. When implementing structures of straight log cabins with three compensation holes with a diameter of 57 and 65 mm, the dependence of the TEMPERATURE change on the volume of compensation space in the log cabin is established. The amount of compensation required for the successful operation of the log cabin is also determined, which ensures that the log cabin is NOT less than 0.9, which led to an increase in labor productivity and, as a result, the rate of sinking up to 120-130m per month.

Bibliographic list:
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  26. Rakishev B. R., Rakisheva Z. B., Auezova A.M. Velocity and time of expansion of a cylindrical explosive cavity in a rock mass // Explosive business. – 2014. – № 111/68. – P. 3-17.
  27. Ilyakhin S.V., Norov A.Yu., Yakshibaev T.M. Determination of the radius of zones of rock mass fracturing in a camouflage explosion // Explosive business. – 2016. – no. 116/73. – P. 29-36.
  28. Lyashenko V.I., Golik V.I. Scientific and design and technological support for the development of uranium production. Achievements and challenges//Mountain information and analytical Bulletin. -2017. – no. 7. – P. 137-152.
  29. Lyashenko V.I., Khomenko O.E., Kisly P.A. Improving the seismic safety of underground mining of rock deposits based on the use of new explosive charges / / Ferrous metallurgy. Bulletin of scientific, technical and economic information. 2019. Vol. 75. No. 8. P. 912-922. DOI: 10.32339 / 0135-5910-2019-8-912-922.
  30. Lyashenko V.I., Khomenko O.E. Improving the efficiency of drilling and blasting of ore in a clamped environment / / Mining information and analytical Bulletin. – 2019. – № 11. – P. 59-72. DOI: 10.25018 / 0236-1493-2019-11-0-59-72.
UDC 622.831:550.543
V.I. Lyashenko, PhD. tech. sciences, senior researcher
A.X. Dudtchenko, Senior Researcher
(Ukrnipipromtehnologii, Ukraine)
R.A. Rakhmanov, research fellow, Ph.D. in Engineering,
(Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences – IPKON RAS, Moscow, Russia)

Scientific and methodological support and technical support of drilling and blasting preparation of rock ores for underground block leaching

Keywords:rock ores, drilling and blasting preparation, metal leaching,« clamped » environment, seismic safety, efficiency

The main scientific and practical results of scientific-methodological maintenance and technical support of drilling and blasting preparation of rock ore to underground block leaching (WSP) subject to the average linear size of a piece of blasted rock mass between the environment and justify its seismic safety parameters to ensure the rational use, conservation of natural resources and the environment, combined with geotechnical methods. Methods of generalization, analysis and evaluation of practical experience and scientific achievements in the field of drilling and explosive destruction of solid media, continuum mechanics, mathematical statistics, as well as research methods of wave processes using standard and new methods of leading specialists of developed mining countries of the world with the participation of the authors are described. The parameters of seismic vibrations and the quality of crushing of the ore mass and the index of compaction of the clamping material during breaking in PBB blocks with an increase in the «clamping» of the rock mass in the chamber are established. The conditions of explosion on the «clamped» medium were determined, and the speed of displacement of soils on the daytime surface was measured. Geotechnologies were proposed and scientific and methodological support and technical support for drilling and blasting preparation of rock ores and development of PBB of pilot blocks at the Michurinsky field of the state enterprise «VostGOK», Ukraine.

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  27. Trubetskoy K.N. Development of resource-saving and resource-reproducing geotechnologies for complex development of mineral deposits. Moscow: IPKON RAS, 2014, 196 p.
  28. Jonson D. Controlled shock waves and vibrations during large and intensive blasting operations under Stockholm city / Workshop on Tunneling by Drilling and Blasting hosted by the 10th Int. Symp. On Fragmentation due to Blasting (Fragblast 10), New Delhi, India, 24—25 November, 2012. Pp. 49—58.
  29. Monalas F.I., Arusu T. Blasting works in urban area A Singapore case study / Workshop on Tunneling by Drilling and Blasting hosted by the 10th Int. Symp. On Fragmentation due to Blasting (Fragblast 10), New Delhi, India, 24—25 November, 2012, Pp. 23—30.
  30. Gupta I.D., Trapathy G.R. Comparison of construction and mining blast with specific reference to structural safety // Indian Mining and Engineering Journal. 2013. Vol. 54. No. 4. Pp. 13—17.
  31. Lyashenko V., Vorob’ev A., Nebohin V., Vorob’ev K. Published by the National Mining University on behalf of Mining of Mineral Deposits. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (2018) // Mining of Mineral Deposits, 12(1), 95—102 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
  32. Rakishev B.R., Rakisheva Z.B., Auezova A.M. Velocity and time of expansion of a cylindrical explosive cavity in a rock mass // Explosive business. – 2014. – № 111/68. – P. 3-17.
  33. Ilyakhin S.V., Norov A.Yu., Yakshibaev T.M. Determination of the radius of zones of rock mass fracturing in a camouflage explosion // Explosive business. – 2016. – no. 116/73. – P. 29-36.
  34. Komashchenko V.I. Development of explosive technology that reduces the harmful impact on the environment//Izvestiya of the Tula state University. earth science. 2016. no. 1. Pp. 34-43.
  35. Lyashenko V.I., Golik V.I. Scientific and design and technological support for the development of uranium production. Achievements and challenges//Mountain information and analytical Bulletin. -2017. – no. 7. – P. 137-152.
  36. Lyashenko V.I., Andreev B.N., Kucha P.M. Development of mining technologies for underground block leaching of metals from rock ores / / Mining information and analytical Bulletin. – 2018. – no. 3. – Pp. 46-60. DOI: 10.25018/0236-1493-2018-3-0-46-60.
  37. Golik V.I., Razorenov Yu.I., Lyashenko V.I. Conditions for leaching non-ferrous metals from off-balance sheet raw materials//Proceedings of Tomsk Polytechnic University. Engineering of georesources, 2018, Vol. 329, No. 6, Pp. 6-16.
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UDC 622.235.535.2
B.V. Ekvist, Professor, Doctor of Engineering Sciences
(Mining Institute National University of Science and Technology – MISIS, Moscow, Russia)

Estimation of seismic influence of massexplosions with uneven location of charges

Keywords:explosive charge, the location on the block, seismic explosion, collapse

Describes the Geology of the rocks composing the gold mine of the enterprise "the pole", located on the North of the Krasnoyarsk territory. Blasting operations are conducted in an open way with the use of non-electric explosives, "Iskra" and with det cord. With increasing depth of the quarry is important to reduce the seismic forces on his side to prevent their collapse. Considered the seismic effects on rock mass of the explosion of the charge is located asymmetrically on the block. It is shown that nesimmetrichnye obrivaetsa unit, the more when it is the explosion of the low frequency component of seismic vibrations, which shakes the stronger rock mass and leads to the collapse of slopes of ledges. At large depths it is advisable to quarry blasting work on the blocks symmetrically and evenly spaced charges of industrial explosives. The measurements were carried out a certified domestic seismic recorder "Delta-Geon". The logger was installed at a distance of 100-300m from the blast with the goal of fixing the seismic vibrations from the explosions of charges, each blow of the group.

Bibliographic list:
  1. Kutuzov B.N. Safety of explosive works in mining and industry. – Moscow: Gornaya kniga, 2009. – 670 p.
  2. Sovmen V.K., Kutuzov B.N., Maryasov A.L., Ekvist B.V., Tokarenko A.V. Seismic safety in explosive works: textbook. – Moscow: Gornaya kniga, 2012. – 228 p.
  3. Liu van thyk, Le Kong Kyong, Le BA Phyk, Phan Ngu Hoan, Kuznetsov V.A. Justification of the rational specific consumption of EXPLOSIVES in the development of overburden of coal pits in Vietnam / / Mining industry. 2013. No. 5. P. 21-25. (in Vietnamese).
  4. Mehdi Hosseini, Mehdi Seifi Baghikhani. Analyzing the Ground Vibration Due to Blasting at AlvandQoly Limestone Mine// International Journal of Mining Engineering and Mineral Processing, 2013 2(2), pp. 17 – 23, 10.5923/ j. mining. 20130202.01.
  5. Kutuzov B.N. Methods of conducting explosive works. – M.: Gornaya kniga, 2008. CH. 2: Explosive works in mining and industry. – 511 p.
  6. Kutuzov B.N., Ekvist B.V., Bragin P.A. Comparative assessment of the seismic impact of the explosion of borehole charges when using a system of non-electric initiation and electric detonators with electronic deceleration / / Gorny Zhurnal. 2008. no. 12. Pp. 44-46.
  7. Gospodarikov A.P. On some results of numerical modeling of the impact of seismic and explosive waves on an underground oil pipeline // Modern problems of science and education: electronic scientific journal. 2015. # 1. URL: http://www.science-education.ru/121-18630 (accessed 12.09.2016).
  8. Gogodarikov A.P. Mathematical modeling of an underground oil pipeline under the influence of explosive waves / / Gorny information and analytical Bulletin. 2014. no. 4. Pp. 341-344.
  9. Braun L.G. Seismic hazard evaluation using apparent stress ratio for mining-induced seismic events: Ph. D. Thesis, Laurentian University. 2015 – – 257 p.
  10. Chan Kuang Hiyeu, Nguyen Din Ahn, Nkhy Van Fuk, Belin V.A. Pilot studies of influence of diameter of explosive wells on seismic action of explosions on Nuybeo coal mine//Explosive technologies: conference materials, Hanoi, Vietnam, on October 22, 2015. P. 252-255.
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Section 3. Review of achievements in world explosive practice
UDC 622.235.5
Gustavo Sampaio Lopes
Claudio Cesar Gajardo Arraño
Manuel Villalobos Calderon
(Enaex Mining Technical Solutions)
Adimir Fernando Rezende
(BRANDT Meio Ambiente Ltda)
Eltton de Sousa Veras
Luiz Felipe Mendonça de Amorim
(Vale S.A.)

Seed wave modeling to natural caves protection in mining operations

Keywords:explosive, wave, charge, vibration, near zone, far zone

The restrictions imposed by the Brazilian environmental legislation regarding natural caves lead to a block of substantial amount of mineral reserves. Mining activities can exploit caves surroundings, as long as the company ensures that the activities will not cause any damage to them, requiring profound and time-consuming studies. Since the use of explosives in the mine are potential sources of some damage to any structures, it leads to a deep need for controlling the rock blasting activities. In this context, the maximum charge per delay used in operations close to cave regions must follow some internal blasting assumptions that have been developed during specific tests and mining activities. By the seed wave technique, it is possible to determine the behavior of a seismic wave, which travels through a rock mass and it is generated by blasting a known explosive charge. This technique has proved to be an effective tool because it is able to accurately include the physical characteristics of the rock and different lithologies. This paper discusses about modelling blasting induced vibrations in order to improve caves protection, which surround the mining operations.

Bibliographic list:
  1. AssociaçãoBrasileira de NormasTécnicas (2005) – ABNT NBR 9653:2005 – Guia para avaliação dos efeitosprovocadospelouso de explosivosnasmineraçõesemáreasurbanas.
  2. Blair D.P. (1999). Statistical models for ground vibration and air blast, Int. J. Blasting and Fragmentation, Vol 3, pp335-364.
  3. Dowding C.H. (1985), Blast Vibration Monitoring e Control, Prentice Hall Inc., 297 pp.
  4. Canedo G.R. (2013). Mapa de iso-velocidades: umaferramenta para o controle das vibraçõesnaspedreiras. Tese (Doutorado)- Escola Politécnica da Universidade de São Paulo. Departamento de Engenharia de Minas e de Petróleo. São Paulo, 161 p.
  5. McKenzie C.K. & Adamson W R. (2011) Exploring Optimized Delay Timing for Fragmentation. Explo Conference, Melbourne. Australia
  6. Mckenzie C.K. (2013). Limits Blast Design: Controlling Vibration, Gas Pressure & Fragmentation. Queensland, Australia
  7. ICMBio - Instituto Chico Mendes de Conservação da Biodiversidade/ CECAV – Centro Nacional de Pesquisa e Conservação de Cavernas. 2016. SismografiaAplicada à Proteção do PatrimônioEspeleológico:orientaçõesbásicas à realização de estudosambientais / Marcos Pinho. [et al.]. – Brasília, Brasil
UDC 622.235.5
Gustavo Sampaio Lopes
Jose Silvio Corsini
(Enaex Mining Technical Solutions)
Davi Bastos Martins de Oliveira
Aurelio Manço Garcia
Luana Ferreira de Carvalho
(Anglo American)

Vibration data analysis to optimize the blast design and improve shovel productivity

Keywords:explosion, model, vibration, installation scheme, well, explosive, rock

The Enaex Mining Technical Solutions (EMTS) team, in partnership with the Anglo American Iron Ore Brazil drilling and blasting team, has developed a study aiming to optimize the blast design applied at the Minas-Rio project. The study consists of modeling the dynamic behavior of one lithological domain to determine the best configuration of drilling pattern, charge configuration, timing and sequencing of the blast designs applied at the mine in this particular rock. The first stage of the study was the recognition of the rock blast process in question, assessing key parameters that characterize this whole operation: geomechanical characteristics of the rock mass, implementation quality for drilling pattern and explosives charging (collar position, hole depth, explosive charge length and stemming size) and recognition of current blast designs. The central element of this study was the creation of a vibration attenuation and seed wave model which has allowed the characterization of this particular rock mass present in a region determined by the Minas-Rio team. The model is based on a near field vibration test, constituting a powerful tool in the design of blast parameters. The blast design developed from the damage model simulations basically modified the timing and sequencing. The aim of this study was to improve the fragmentation resulted by the blasting, considering the particle size requirements demanded by the primary crusher and to increase the productivity of the loading and hauling operations. The results were analyzed considering the effective productivity of the two different fleet types of shovels, where the authors have analyzed more than 46000 values of productivity from September 2017 to August 2018, taken from the Dispatch system. A significant increase in effective productivity of these load equipment was observed, 7% to the PC4000 fleet and 2% to the PC5500 fleet, values supported by statistical parameters and hypothesis tests.

Bibliographic list:
  1. Adamsom W.R, Scherpenisse C.R. 2000. The measurement and control of blast induced damage of final pit walls in open pit mining. International Society of Explosives Engineers. Pp. 539-554
  2. Holmberg R. &Persson P., 1980. Design of tunnel perimeter blast hole patterns to prevent rock damage. Transactions of the Institute of Mining and Metallurgy, Volume 89, pp. A37-A40.
  3. Ibarr J.A. Maerz N.H and. Franklin J.A., 1996. Overbreak and underbreak in underground opening part 2: causes and implications. GeotechnicalandGelogicalEngineering
  4. Rorke A.J., 2007. An evaluation of precise short delay periods on fragmentation in blasting. ViennaConferenceProceedings, 2007, A257 – A263.

Section 4. Information, chronicle
Victory Day
Conference organizing committee interview with A.P. Filatov - head of the mining supervision department of Rostekhnador
Conference organizing committee interview with A.P. Filatov - head of the mining supervision department of Rostekhnador
Valery Nikolaevich Zakharov (to the 65th anniversary)
Derzhavets Avram Semenovich (to the 85th anniversary)
Igor Fedorovich Zharikov (to the 80th anniversary)
Vyacheslav Alexandrovich Sosnin (to the 70th anniversary)
Alexander Vasilyevich Starshinov (to the 70th anniversary)
Ivan Nikolaevich Gaivoronsky (to the 80th anniversary)

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