Journals →  Gornyi Zhurnal →  2019 →  #5 →  Back

ArticleName Development of deep placers by contiguous counter dredging
DOI 10.17580/gzh.2019.05.10
ArticleAuthor Dudinsky F. V., Nechaev K. B.

Irkutsk National Resarch Technical University, Irkutsk, Russia:

F. V. Dudinsky, Professor, Doctor of Engineering Sciences
K. B. Nechaev, Associate Professor, Candidate of Engineering Sciences,


The analysis of the known methods for the development of placers by dredging has been carried out, taking into account the improvement of technology and equipment in our country and abroad. A number of features have been identified that distinguish the dredging method of developing deep placers from others. The possible options for setting the limits for extraction of pillars between the dredge passes, which determine values of sand loss and dilution, are presented. The features of deep dredging and the formation of pillar between the counter passes of dredges are considered. The process flow charts for placer dredging with overburden removal to external and internal dumps have been developed. The effect of dredge pass width on the minng efficiency is estimated in cases of loss and dilution. The permissible values of mineral loss in pillars between dredge passes and dilution of sands by overburden are determined taking into account the indicators and parameters of mining, using the net present value of the project as a rating criterion. The results of the implemented methodological approach to substantiating parameters of deep placer mining by contiguous counter dredging with regard to the time effect are described. This approach makes it possible to find rational parameters of process flow charts and to determine (normalize) the permissible level of loss or dilution of sands by overburden. The study into development of placers by contiguous counter dredging yields that selection of a deep placer mining scenario, determoination of technical and economic indicators as well as justification of process flow chart parameters should be based on the aggregate analysis of all possible variants of stripping and productive mining with the first and second passes across the whole width of an open pit. Efficiency of mining can be adjusted by variying the width of the counter dredge passes.

keywords Placer, interstitial bar, sands loss, waste dilution, dredging, counter pass, longitudinal–contiguous mining, technological scheme

1. Kashuba S. G., Leskov M. I. Gold mining in Russia: Between past and future. Gornyi Zhurnal. 2015. No. 7. pp. 90–96. DOI: 10.17580/gzh.2015.07.12.
2. Litvintsev V. S. Basic directions of the strategy of mastering of anthropogenic ore and placer deposits of noble metals. Eurasian Mining. 2014. No. 1. pp. 7–11.
3. Litvinsev V., Sas P. Current state and main directions of innovative development of placer gold mining in Far East Federal District. Problems of Complex Development of Georesources : Proceedings of the VII International Scientific Conference. 2018. E3S Web Conf. Vol. 56. 04004.
4. Ilin S. A., Kovalenko V. S., Pastikhin D. V. Russian Far East: advancing of open-cast mining. Gornyi Zhurnal. 2013. No. 5. pp. 77–84.
5. Dobretsov V. B., Sendek S. V., Opryshko D. S. Mineral resourses of Russia and development prospects of small gold placers. Izvestiya vuzov. Gornyi Zhurnal. 2005. No. 2. pp. 15–24.
6. Snetkov V. I., Talgamer B. L. Appraisal and exploitation of mining and dressing waste at dredge sites. Journal of Mining Science. 2014. Vol. 50, Iss 1. pp. 108–114.
7. Ageev O. A., Medkov M. A., Ivannikov S. I., Yudakov A. A. Prospects of gold mining from technogenic objects of Nagima deposit. Tsvetnye Metally. 201 5. No. 3. pp. 78–84. DOI: 10.17580/tsm.2015.03.16
8. Golovina E., Dykusova A., Zhizhelev M. Innovative methods of extracting the loose gold from technogenic deposits in the Irkutsk region. Investment, Construction, Real Estate: New Technologies and Special-Purpose Development Priorities : 2018 International Scientific Conference. 2018. MATEC Web Conf. Vol. 212. 01016.
9. Ermakov S. A., Burakov A. M., Batugina N. S. Continuous flow process technology for gold extraction and beneficiation at the buried placer in the Bolshoi Kuranakh River valley (Yakutia). Gornyi Zhurnal. 2016. No. 1. pp. 40–45. DOI: 10.17580/gzh.2016.01.09.
10. Korostovenko V. V., Morozova N. V., Egorova E. L., Mironkin V. A., Morozov V. N.The specific features of technology of preparation work of artificial sushentsy territory on the placer accumulation with high ice content. GIAB. 2012. No. 8. pp. 46–52.
11. Tarasenko E. A., Kislyakov V. E. Development and substantiation of efficient mining technologies for boulder placers. Krasnoyarsk : Sibirskiy federalniy universitet, 2014. 100 p.
12. Garnett R. H. T. Graphical representation of production results versus estimates in placer mining. Transactions of the Institutions of Mining and Metallurgy. Section B: Applied Earth Science. 2015. Vol. 124, No. 3. pp. 175–190.
13. Brown L., Vearncombe J. Critical analysis of successful gold exploration methods. Transactions of the Institutions of Mining and Metallurgy. Section B: Applied Earth Science. 2014. Vol. 123, No. 1. pp. 18–24.
14. Stanaway K. J. Ten placer deposit models from five sedimentary environments. Transactions of the Institutions of Mining and Metallurgy. Section B: Applied Earth Science. 2012. Vol. 121, No. 1. pp. 43–51.
15. Popov S. V. High-capacity dredge 400N No. 1 ready for operation. Zolotodobycha. 2015. No. 10(203). pp. 12–14.
16. Ershov V. A. The implementation of the idea of purposeful trans-formation of alluvial deposits to meet the requirements of the dredge exploration. GIAB. 2011. No. 7. pp. 56–60.
17. Johnson K., Mackenzie A. Gold Dredging in the Klondike and Number 4. Annual Conference of the Canadian Society for Civil Engineering. Edmonton, 2012. Vol. 1. pp. 211–220.
18. Leshkov V. G. Placer mining : Textbook. Moscow : Gornaya Kniga, 2007. 906 p.
19. Chemezov V. V. Efficient placer mining. Moscow : Nedra, 1980. 223 p.
20. Kostromin M. V., Yurgenson G. A., Pozlutko S. G. Problems of dredging at continental placers. Novosibirsk : Nauka, 2007. 180 p.
21. Chemezov V. V., Talgamer B. L. Man-made placers (formation, appraisal and development). Irkutsk : Izdatelstvo IrGTU, 2013. 239 p.
22. Kostromin M. V., Greshilov D. M. Technique, technics and technology of definition, decrease and liquidations in interstep-by-step and interrunning sights at draged to development of looses. GIAB. 2014. No. 12. pp. 68–75.

Language of full-text russian
Full content Buy