Ore dressing for the balance, mined and merchantable ores at the Jamgyr gold deposi

DOI: https://doi.org/10.30686/1609-9192-2023-1-101-108
Читать на русскоя языкеN.N. Ermoshkin1, D.N. Ermoshkin2, K.Z. Kurmanaliev3, V.A. Mansurov4
1 Global Jamgir Mining, Bishkek, Kyrgyz Republic
2 Global Asia Management, Bishkek, Kyrgyz Republic
3 Geolekspertproekt LLC, Bishkek, Kyrgyz Republic
4 Vertex Gold Co, Bishkek, Kyrgyz Republic

Russian Mining Industry №1 / 2023 р. 101-108

Abstract: Ores of the Jamgyr deposit (Kyrgyz Republic) are subject to dilution of over 54% during mining due to the structural and morphological features of the deposit. The mined ore is restored to 96-99% of the reserve (balance) grade as the result of ore dressing. The low cost of the merchantable ore dressing makes it possible to use larger stoping zones increased up to 2.5-3 m and introduce high-performance and low-cost mining methods with the output above 500-600 thousand tonnes of mined ore per year. The paper presents the results of introducing the sensor-based ore separation, which ensures removal of up to 40% of the gangue rock present in the country rock layers within the explored zones. As a consequence, the average gold content of the ore is predicted to be higher than the balance estimate obtained during the exploration phase. Future studies may change the methodology for estimating this parameter when calculating the reserves.

Keywords: ore dressing, screening, sensor-based separation, balance separation, operational separation, merchantable ore

For citation: Ermoshkin N.N., Ermoshkin D.N., Kurmanaliev K.Z., Mansurov V.A. Ore dressing for the balance, mined and merchantable ores at the Jamgyr gold deposit. Russian Mining Industry. 2023;(1):101–108. https://doi.org/10.30686/1609-9192-2023-1-101-108

Article info

Received: 28.12.2022

Revised: 19.01.2023

Accepted: 20.01.2023

Information about the author

Nikolay N. Ermoshkin – Director General, “Global Jamgir Mining”, Bishkek, Kyrgyz Republic

Denis N. Ermoshkin – Director General, “Global Asia Management”, Bishkek, Kyrgyz Republic

Kapar Z. Kurmanaliev – mining engineer-geologist, “Geolekspertproekt LLC”, Bishkek, Kyrgyz Republic; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Vladimir A. Mansurov – Doctor of Sciences (Physics and Mathematics), Professor, Geotechnical Advisor, “Vertex Gold Co”, Bishkek, Kyrgyz Republic


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