АР08857087 — Implementation of innovative mining transport systems and increasing the intensity of ore mining in deep pits in the conditions of the limit state of steep layers

The purpose of the project is to establish the influence of changing the shape of the mating cavities of the open worked-out space during the formation of a stationary transport lift before the approach of mining operations to the limiting surface contour of the open pit and their conduct in steeply sloping layers on the stability of its sides and ensuring highly rhythmic mining operations during the modernization of the mining transport system in open pit fields round shape.   

Relevance: The problem of the influence of the technology of mining ledges with transverse panels in steep layers (before and after the transition of the limiting surface contour of an open pit) to the stress state of the rock mass and the intensity of ore mining remains unresolved. The intensity of ore mining in deep and ultra-deep open pits is significantly reduced due to the rigid relationship between mining and overburden. Ensuring the safety of production in steeply sloping layers of mining from top to bottom and reducing the dependence of ore mining and overburden excavation are topical problems of open geotechnology and geomechanics.

Scientific adviser:  Doctor of technical sciences, Professor, Moldabayev Serik

Results obtained: Within the framework of the research project, comprehensive geomechanical modeling of slope stability at the Kacharsky open pit was performed using 3D stress–strain analysis in the RS3 software package. The stability of pit slopes was assessed at different mining stages by determining safety factors using the shear strength reduction method. Zones of maximum deformation were identified and potential slip surfaces were determined considering changing geological and mining conditions. The influence of rock fracturing, water saturation, and seismic loading on slope stability was simulated. New technological solutions for mining steeply inclined layers using transverse panel extraction were developed and justified. A mathematical model for optimizing the mining schedule and a corresponding software tool were created. The results confirm the feasibility of safe and efficient modernization of the mine transport system.

List of publications with links to them

1. Shcherbakov P.N., Timchenko S.E., Bitimbaev M.Zh., Sarybaev N.O., Moldabayev S.K. Mathematical model of optimization of drilling and blasting operations in opencast mining of rocky mineral deposits // Mining of Mineral Deposits. – 2021. – Vol. 15(1). – P. 25–34. – DOI: https://doi.org/10.33271/mining15.02.025. (CiteScore 2.8, percentile 63).
2. Moldabayev S.K., Sdvizhkova O.O., Babets D.V., Kovrov O.S., Adil T.K. Numerical simulation of the open pit stability based on probabilistic approach // Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. – 2021. – № 6. – P. 29–34. – DOI: https://doi.org/10.33271/nvngu/2021-6/029. (CiteScore 1.7, percentile 50).
3. Sarybayev N.O., Moldabayev S.K., Sodaba Hurmat, Bagdatov T.E. Development perspectives of cyclic and continuous method // Горный журнал Казахстана. – 2021. – № 5. – С. 26–29.
4. Sarybayev N.O., Moldabayev S.K., Sadat Hosay. Cyclic and continuous method in coal mining // Горный журнал Казахстана. – 2021. – № 6. – С. 20–23.
5. Moldabayev S.K., Adil T.K., Sultanbekova Zh.Zh., Akhmetkanov D.K., Kozhantov A.U. Reliability of stress–strain state modeling of excavations in deep open pits // Trudy universiteta. – Karaganda: KarTU, 2022. – P. 129–136. (KOKSON).
6. Moldabayev S.K., Toktarov A., Basketin A. Optimization of boundaries of application of automobile–conveyor–rail transport in deep iron ore open pits // Marksheideriya i nedropolzovanie. – 2022. – № 2(118). – P. 37–40.
7. Moldabayev S.K., Adil T.K., Isakov B.B., Oraltaev N.N. Reserves for increasing productivity of steeply inclined conveyor during transfer of rock mass to in-pit railway transport // Proceedings of the XXI Baikonurov Readings. – Zhezkazgan, 2021. – P. 164–169. – ISBN 978-601-7971-70-0.
8. Moldabayev S.K. Basic provisions for determining the feasibility of using a transfer device in the deep zone of ore pits // Proceedings of the International Scientific and Practical Conference dedicated to the 115th anniversary of A.Zh. Mashanov and 100th anniversary of Zh.S. Erzhanov. – Almaty: Satbayev University, 2022. – P. 171–178. – ISBN 978-601-323-277-5.
9. Moldabayev S.K., Adamchuk A.A., Isakov B.B., Sarybayev N.O. Transfer device for operation in the deep zone of ore pits // Same conference proceedings. – 2022. – P. 178–185. – ISBN 978-601-323-277-5.
10. Patent RK No. 34721 (application No. 2019/0144.1 dated 21.02.2019). Transport installation for reworking near-contour reserves under railway pillars / Moldabayev S.K., Kuzmenko S.V., Kalyuzhny E.V., Adamchuk A.A., Shustov A.A. – Bulletin No. 46, 20.11.2020.
11. Patent RK No. 35001 (application No. 2019/0245.1 dated 08.04.2019). Device for transferring rock from conveyor to railway transport / Moldabayev S.K., Kuzmenko S.V., Kalyuzhny E.V., Shustov A.A., Aben E. – Bulletin No. 15, 16.04.2021.
12. Application No. 2021/0600.1 (dated 06.10.2021). Device for through passage of dump trucks during unloading / Moldabayev S.K., Adamchuk A.A., Askarov E.S., Kuzmenko S.V., Kalyuzhny E.S., Bogash M.I.
13. PCT application RST/KZ2019/00012 (02.07.2021). Device for transferring rock from road transport to conveyor hoist / Moldabayev S.K., Kuzmenko S.V., Kalyuzhny E.V., Drizhenko A.Yu., Adamchuk A.A. – Available in European Patent Office database (EPO), No. 24659-PCT-EP.
14. Patent RK No. 35754 (application No. 2021/0275.1 dated 30.04.2021). Transport installation for deep open pits / Moldabayev S.K., Adamchuk A.A., Aben E., Kuzmenko S.V., Kalyuzhny E.S., Bogash M.I. – Bulletin No. 28, 15.07.2022.
15. Notification of intention to grant Eurasian patent (application No. 202192683 dated 16.09.2022). Transport installation for deep open pits / Moldabayev S.K., Adamchuk A.A., Aben E., Kuzmenko S.V., Kalyuzhny E.S., Bogash M.I. – 20.09.2022.