Mining of structurally complex lodes at Kochbulak fold deposit: Experience and prospects

A critical task of industrial advancement in mineral mining is the use of innovative and upgraded underground mining systems which maximize mineral production. The tectonic structure of the study deposit is governed by a complex multistage process of tectonics and magmatism in the region and by its adjacency to the center of the oval Kochbulak caldera with the northwestward extension with azimuth of 320 deg. The article justifies feasibility of enhanced mining efficiency in structurally complex ore bodies (ore lodes) at Kochbulak gold deposit through the use of improved alternatives of open stoping with ore extraction from sublevel drifts and cross-cuts, room-and-pillar mining and blasting with ore pass chutes. At Kochbulak deposit, ore is currently mostly produced using the conventional technology with preparation and pretreatment of extraction blocks, which negatively affects integrity of the rib and safety pillars as the mining depth increases. The mining systems in use at the deposit at the moment are reviewed, and the mining performance within some years past is described. Some arrangements to enhance ore extraction and metal production are proposed. The optimal parameters of the underground mining systems are suggested.

Keywords: ore body, enclosing rocks, tectonic faults, ore stability, gold deposit, mining systems, ore losses, dilution, block preparation, stoping.
For citation:

Akbarov T. G., Urazov J. D., Nishanov A. Sh., Nishanov D. K. Mining of structurally complex lodes at Kochbulak fold deposit: Experience and prospects. MIAB. Mining Inf. Anal. Bull. 2023;(2):97-110. [In Russ]. DOI: 10.25018/0236_1493_2023_2_0_97.

Issue number: 2
Year: 2023
Page number: 97-110
ISBN: 0236-1493
UDK: 622.27
DOI: 10.25018/0236_1493_2023_2_0_97
Article receipt date: 06.07.2022
Date of review receipt: 17.08.2022
Date of the editorial board′s decision on the article′s publishing: 10.01.2023
About authors:

T.G. Akbarov1, Cand. Sci. (Eng.), Assistant Professor, e-mail:, ORCID ID: 0000-0002-4930-4246,
J.D. Urazov2, Chief Engineer, e-mail:, ORCID ID: 0000-0002-1481-8538,
A.Sh. Nishanov2, Deputy Head Site, e-mail:, ORCID ID: 0000-0001-8331-0693,
D.K. Nishanov2, Mining Engineer for Occupational Health and Safety, e-mail:, ORCID ID: 0000-0001-6074-6937,
1 Islam Karimov Tashkent State Technical University, 100095, Tashkent, Uzbekistan,
2 Almalyk Mining and Metallurgical Combine, Kochbulak mine, 110100, Almalyk, Uzbekistan.


For contacts:

J.D. Urazov, e-mail:


1. Akbarov T. G., Nishanov A. Sh., Urazov J. D. Rational technology of underground mining of ore bodies of the Kochbulak deposit with uneven mineralization. Universum: tekhnicheskie nauki. 2021, no. 12 (93), pp. 5—8. [In Russ]. DOI: 10.32743/UniTech.2021.93.12.12828.

2. Ergashev A., Alimov A. Mineralogy and composition of ores Kochbulak deposit. Internauka. 2022, no. 2 (225), pp. 69—74. [In Russ]. DOI: 10.32743/26870142.2022.2.225.329394.

3. Umarova I. K., Makhmarezhabov D. B., Akhmedov B. M. Study of the material composition of gold–bearing ores of the Kochbulak and Kyzylalma deposits. Nauki ob obrazovanii. 2021, no. 2, pp. 749—755. [In Russ].

4. Akbarov T. G., Nishanov A. Sh., Urazov Zh. D. Ratsional'nye tekhnologii podzemnoy razrabotki zolotorudnykh mestorozhdeniy Angrenskogo regiona. Monografiya [Rational technologies of underground mining of gold deposits of the Angren region. Monograph], Tashkent, Izd-vo «Navruz», 2022, 212 p.

5. Erokhin N. A., Rybalov V. G., Goloshukov P. M., etc. Report on the results of detailed exploration of the northern part of the Kochbulak gold deposit. Geologiya mestorozhdeniya, metodika i ob"emy rabot [Geology of the deposit, methodology and scope of work], vol. 1, book 2, Tashkent, 1985, pp. 29—32.

6. Akbarov T. G., Nishanov A. Sh., Urazov J. D., Ashirov Yu. N. Features of underground mining of the Kochbulak gold ore deposit. International Journal of Innovative Science and Research Technology. 2021, vol. 6, no. 12, pp. 904—907.

7. Kalmykov V. N., Slashchilin I. T., Suraev V. S., Strukov K. I. Experience and prospects of development of complex-structural veins of the Kochkar gold deposit. MIAB. Mining Inf. Anal. Bull. 2000, no. 1, pp. 180—182. [In Russ].

8. Kaplunov D. R., Rylnikov M. V., Radchenko D. N. Expansion of the raw material base of mining enterprises based on the integrated use of mineral resources of deposits. Gornyi Zhurnal. 2013, no. 2, pp. 86—90. [In Russ].

9. Sokolov I. V., Smirnov A. A., Antipin Yu. G., Baranovskiy K. V., Nikitin I. V., Rozhkov A. A., Solomein Yu. M., Dedov O. Yu. Features of the underground development of the Vetrensky gold deposit. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2018, no. 4, pp. 12—22. [In Russ]. DOI: 10.21440/0536-1028-2018-4-12-22.

10. Sokolov I. V., Smirnov A. A., Antipin Yu. G., Sokolov R. I. Influence of extraction indicators on the efficiency of underground mining technology of ore deposits. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal. 2012, no. 3, pp. 4—11. [In Russ].

11. Massabki R. F. Panel opening in sublevel open stope mining using modeling software. 24th World Mining Congress, Rio de Janeiro, Brazil. 2016, pp. 358—364.

12. Gao F., Zhou K. P., Deng H. W., Yang N. G., Li J. L. Design and application of an efficient mining method for gentle-dipping narrow vein at Kafang Mine. Proceedings of the International Seminar on Design Methods in Underground Mining, Australian Centre for Geomechanics. Perth. 2015, pp. 293—305.

13. Lizunkin M. V. Experience of borehole extraction of low-power uranium ores. MIAB. Mining Inf. Anal. Bull. 2015, no. 10, pp. 23—26. [In Russ].

14. Belin V. A., Gorbonos M. G., Mangush S. K., Ekvist B. V. New technologies of conducting explosive works. MIAB. Mining Inf. Anal. Bull. 2015, special edition 1, pp. 87—101. [In Russ].

15. Raimzhanov B. R., Khakimov Sh. I., Khamzayev S. A. Sublevel mining system with artificial pillars made of a hardening backfills for the development of veins in difficult geomechanical conditions. Texas Journal of Multidisciplinary Studies. 2021, vol. 3, pp. 98—104.

16. Shakarov B. Sh., Khasanov O. A., Gaibnazarov B. A., Alimov Sh. M. Experience in improving residential deposits with ore magazination. International Journal of Advanced Research in Science, Engineering and Technology. 2019, vol. 6, no. 12, pp. 11973—11977.

17. Hudeček V., Šancer J., Zubíček V., Golasowski J. Experience in the Adoption of room & pillar mining method in the Company OKD, a.s., Czech Republic. Journal of Mining Science. 2017, vol. 53, no. 1, pp. 99—108. DOI: 10.1134/s1062739117011908.

18. Kim Jong-Gwan, Ali Mahrous A. M., Yang Hyung-Sik Robust design of pillar arrangement for safe room-and-pillar mining method. Geotechnical and Geological Engineering. 2018, vol. 37, no. 3, pp. 1931—1942. DOI: 10.1007/s10706-018-0734-1.

19. Zhou Nan, Li Meng, Zhang Jixiong, Gao Rui Roadway backfill method to prevent geohazards induced by room and pillar mining: a case study in Changxing coal mine, China. Natural Hazards and Earth System Sciences. 2016, vol. 16, no. 12, pp. 2473—2484. DOI: 10.5194/ nhess-16-2473-2016.

20. Egemberdiyev R. I., Volkov Yu. A. Justification of mining technology and its parameters for thin and steeply dipping ore bodies (lodes). MIAB. Mining Inf. Anal. Bull. 2019, no. 10, pp. 22—34. [In Russ]. DOI: 10.25018/0236-1493-2019-10-0-22-34.

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