Priargunsky Mining and Chemical Works, Krasnokamensk, Russia:

A. S. Belousov, Head of Mine Planning, Control and Support Department of the Central Research Laboratory, BelousovAS@ppgho.ru
I. A. Kiselev, Deputy Chief Executive Officer – Chief Engineer

Repair-and-Engineering Works, Krasnokamensk, Russia:
O. N. Alekseev, Director

The article gives a brief geographical and geological characteristic of the Streltsovskoe ore field where Priargunsky Mining and Chemical Works extracts uranium from mostly thin and medium-thick ore bodies. The mining system is stoping in horizontal layers with cemented backfill. The authors describe two new technologies of preparing and developing thin and medium-thick ore bodes using local declines and extracting uranium ore by increased height layers within a single process. The cost of mining and haulage is reduced due to decreased volumes of face-entry drivage, backfilling and selective breakage. In stoping, Priargunsky MCW uses load–haul–dumpers PD-2E manufactured by the Repair-and-Engineering Works of Priargunsky MCW, L130 Aramine, MPDE and other. Intending to improve mining technology and efficiency in complex-structure uranium ore bodies, Priargunsky MCW successfully develops production in modern economic environment. Economic efficiency of new technologies reaches 60 MRub at complete extraction of ore blocks. The technology with the increased height layers, local access declines to lower-lying layers and development of three layers from a single cross-cut has allowed considerable reduction in the volume of backfilling –to 10000 thou m³ per a stoping block. The volume of face-entry drivage is decreased by 700 m. As a result, efficiency of mining in thin uranium ore bodies using the system of stoping in horizontal layers with cemented backfill has been essentially improved, which enables development of both stable and unstable ore bodies by means of making an artificial backfill roof in stopes.

1. Lu Liming. Iron Ore: Mineralogy, Processing and Environmental Sustainability. Cambridge : Woodhead Publishing, 2015. 641 p.
2. Pishbin M., Fathianpour N., Mokhtari A. R. Uniaxial Compressive Strength spatial estimation using different interpolation techniques. International Journal of Rock Mechanics and Mining Sciences. 2016. Vol. 89. pp. 136–150.
3. Local Standard STO 07621060-056-2012. Mining System: Stoping in Horizontal Layers with Cemented Backfill. Krasnokamensk : PPGKHO, 2012. 89 p.
4. Production Procedures TR 07621060-09-2012. Stoping. Krasnokamensk : PPGKHO. 2012. 88 p.
5. Local Standard STP 187-89. Classification of Rocks of C Ore Bodies in Underground Mining in Rockburst-Nonhazardous Sites. Krasnokamensk : PPGKHO, 1989. 8 p.
6. Dadiev M. N. Mining of joint vertical vein- and sheet-like uranium ore bodies using high-duty selfpropelling load–haul–dumpers. Vestnik Zabaikalskogo gosudarstvennogo universiteta. 2014. No. 10(113). pp. 27–33.
7. Ivanov V. G., Kultyshev V. I., Kolesaev V. B., Litvinenko V. G., Sheludchenko V. G., Tirsky A. V. Optimization of Complex-Structure Uranium Deposit Mining. Moscow : Gornaya Kniga, 2007. 265 p.
8. Efremov V. S., Nesterenko V. V., Myzhin S. D., Lysenko Yu. I. Block Preparation in Ore Body Mining. Moscow : Nedra, 1974. 208 p.
9. Shurygin S. V., Belousov A. S., Alekseev O. N. Improvement of mining system for thin ore bodies at Priargunsky Mining and Chemical Works. Gornyi Zhurnal. 2013. No. 8-2. pp. 19–20.
10. Azadi M. R., Taghichian A., Taheri A. Optimization of cement-based grouts using chemical additives. Journal of Rock Mechanics and Geotechnical Engineering. 2017. Vol. 9, Iss. 4. pp. 623–637.
11. Zhang Z.-X. Rock Fracture and Blasting: Theory and Applications. Oxford : Butterworth-Heinemann, 2016. 528 p.
12. Solomennikov V. A., Cheskidov V. I. Selection of Load-haul–dump machines for hard mineral mining in difficult mining and geological conditions. Journal of Mining Science. 2015. Vol. 51, No. 6. pp. 1213–1219.
13. Guseva A. I., Koptelov M. V., Svyatov A. S. Enhancing sustainability of investment projects in atomic engineering. Tsvetnye metally. 2015. No. 2. pp. 8–13.
14. Andreeva A. A., Mansurov S. Yu., Miklushevskii D. V., Mansurov Yu. N. Model of innovative process for large industrial undertakings. Tsvetnye metally. 2015. No. 3. pp. 74–77. DOI: 10.17580/tsm.2015.03.15