HYDRO- AND GEOMECHANICAL CONDITIONS OF INTERNAL DUMPING IN A FLOODED OPEN PIT MINE

Feasibility of internal dumping in a mined-out flooded open pit under conditions of a recovering cone of depression of ground water is analyzed. During flooding and one-layer dumping, the working areas of loading points on the dump surface are subjected to deformation and landsliding, which makes it impossible to use the available excavation machinery: power shovel (EKG-4US) and walker (ESH-6/45). The engineering methods of estimating influence of flooding on slope stability are based on the theory of limit equilibrium applied to the specific ground conditions, including in situ observation data and modeling results. Based on the theoretical and empirical research findings, conditions of a slope slip wedge during internal dumping in a deep flooded open pit mine are determined. Using the results of the hydro- and geomechanical modeling of an impound dump on a special test bench, the researchers draw the conclusion of selecting a walker with a dumping radius not less than 100 m, capacities of which can come to an end prior to work completion. In view of expensiveness of powerful excavators, it is necessary to evaluate the technology of dumping in a deep flooded open pit mine in the controlled landslide mode. The lines of the further research and focus of the described scientific and technical problem are specified.

Keywords

Internal dump, flooded open pit mine, dumping, slope stability, hydrostatic weighing, hydrostatic pressure, slip wedge, ground water, depression surface.

Issue number: 6
Year: 2018
ISBN:
UDK: 622.271.3
DOI: 10.25018/0236-1493-2018-6-0-38-44
Authors: Nikolashin S. Yu., Nikolashin Yu. M., Kebal Ya. V.

About authors: Nikolashin S.Yu., Candidate of Technical Sciences, Assistant Professor, Saint-Petersburg University of State Fire Service of Emergency of Russia, 196105, Saint-Petersburg, Russia, e-mail: nicolashins_65@mail.ru, Nikolashin Yu.M., Doctor of Technical Sciences, Professor, Academic AMSU, Academy of Mining Sciences of Ukraine, Krivoy Rog, Ukraine, Kebal Ya.V., Graduate Student, Kryvyi Rih National University, 90865, Krivoy Rog, Ukraine.

REFERENCES:

1. Nikolashin Yu. M., Nikolashin M. Yu. Ustoychivost' odnoyarusnogo otvala, otsypaemogo v zatoplennyy kar'er [Stability of the one-tier dump which is poured out in the flooded pit]. Razrabotka rudnykh mestorozhdeniy. 2002, no 81, pp. 31—34. [In Russ].

2. Nikolashin Yu. M. Kombinirovannoe zatoplenie ostatochnykh kar'ernykh vyemok [The combined flooding of residual mining pits]. Gornyy zhurnal. 1999, no 2, pp. 38—40. [In Russ].

3. Polozhennya pro proektuvannya vnutrіshn'ogo vіdvaloutvorennya ta skladuvannya vіdkhodіv virobnitstva v zalіzorudnikh і flyusovikh kar'єrakh [Положення про проектування внутрішнього відвалоутворення та складування відходів виробництва в залізорудних і флюсових кар'єрах]. Dnіpropetrovs'k: Vidavnitstvo «Mіneral». 2004, pp. 6, 8, 14—16.

4. Drizhenko A. Yu. Kar'ernye tekhnologicheskie gornotransportnye sistemy [Career technological mining and transport systems]. Dnepropetrovsk, Derzhavnyy VNZ «NGU», 2011, pp. 458—477.

5. Drizhenko A. Yu., Anisimov O. A. Tekhnologiya vnutrennego otvaloobrazovaniya na otrabotannykh glubokikh zhelezozrudnykh kar'erakh ili ikh uchastkakh [Technology for internal dumping of waste deep iron ore quarries or sites]. Innovatsionnye tekhnologii i proekty v gorno-metallurgicheskom komplekse, ikh nauchnoe i kadrovoe soprovozhdenie: sbornik trudov mezhdunarodnoy nauchno-prakticheskoy konferentsii 18—19 marta 2014 g. Almaty, pp. 176—181. [In Russ].

6. Nіkolashin Yu. M., Vusik O. O., Kebal Ya. V., Domnіchev A. V. Patent UA 84929 U.Е21 41/26, 2013.

7. Pshenichnyy V. G. Opredelenie ratsional'nogo rezhima gornykh rabot i vnutrennego otvaloobrazovaniya dlya kar'erov, razrabatyvayushchikh krutopadayushchie mestorozhdeniya [Definition of a rational mode of mining operations and for internal dumping for mines, developing steeply dipping deposits]. Vіsnik Krivorіz'kogo natsіonal'nogo unіversitetu: zb. nauk. prats'. 2012, no 31, pp. 22—26.

8. Pshenichnyy V. G., Pyzhik N. N. Tekhnologiya vnutrennego otvaloobrazovaniya s formirovaniem vremennogo vnutrennego otvala [Technology of internal dumping with the formation of a temporary internal dump]. Vіsnik Krivorіz'kogo natsіonal'nogo unіversitetu: zb. nauk. prats'. 2014,no 37, pp. 6.

9. Chetverik M. S., Babiy E. V., Bubnova E. A., Tereshchenko V. V. Osnovnye napravleniya ratsional'nogo prirodopol'zovaniya pri otkrytoy dobyche poleznykh iskopaemykh [Main directions of rational use of natural resources in the open mining]. Gіrnichiy vіsnik. Nauk.-tekhn. zb. 2013, no 96, pp. 58—62.

10. Cowan W. R. Thepolicy framework in Canada for mine closure and management of long-term liabilities: a guidance docume. Mackasey W. O., John G. A. Robertson. 2010. http://www.abandoned-mines.org/pdfs/PolicyFrameworkCanforMinClosureand MgmtLiabilities.pdfpp.140

11. Eberhardt E. Rock slope stability analysis utilization of advanced numerical techniques. University of British Columbia, Vancouver, Canada, 2003. 41 p.

12. Severin J. Use of Ground-Based Synthetic Aperture Radar to Investigate Complex 3-D Pit Slope Kinematics. Severin J., Eberhardt E., Leoni L., Fortin S. Proceedings, Slope Stability 2011: International Symposium on Rock Slope Stability in Open Pit Mining and Civil Engineering, Vancouver, Canada (September 18—21, 2011). https://www.idscorporation.com/images/Downloads/GeoRadar/IBIS_White_Papers/slopePaper157.pdf.

13. Pells P.J.N., Sullivan T. D., Meynink W.J.C., Bertuzzi , Eggers M. J., Mostyn G. Hornsby Shire Council Former CSR quarry Hornsby & associated lands. 2007. http://www.hornsby.nsw.gov.au/media/documents/planning-and-building/quarry/psm-geo-report/PSM-Geotechnical-Report-Main-Report.pdf. 27.

Our partners

Подписка на рассылку

Раз в месяц Вы будете получать информацию о новом номере журнала, новых книгах издательства, а также о конференциях, форумах и других профессиональных мероприятиях.