Composite granular backfill in stoping by stripes

In stoping by stripes, an extraction panel is conditionally divided into stripes up to 8 m wide. Extraction of such stripes is carried out in stable ore bodies, by bottom-up slicing with backfill. In this case, cemented backfill mixtures are used as it is impossible to retain hydraulic fills inside the indicated boundaries when the neighbor stripes are cut. The cost of cemented backfill can be saved using a composite granular mixture with tailings which are the source of hazardous environmental pollution. In this method, first a cemented granular mixture is used to erect a retaining wall 0.5–2.9 m thick subject to the dip angle on the side of the next strip to be cut, the rest mined-out void is filled with hydraulic granular mix. Backfill operations are carried out immediately after slicing. Stoping operations are moved to the neighbor extraction panel and are returned as backfill is accomplished. The composite granular backfill method protected by a patent is explained graphically. The basic diagram of granular backfill preparation and haulage is proposed. A simplified example of interaction between side rocks and composite backfill is given.

Pirogov G. G., Voronov E. T. Composite granular backfill in stoping by stripes. MIAB. Mining Inf. Anal. Bull. 2021;(3-2):125-132. [In Russ]. DOI: 10.25018/0236_ 1493_2021_32_0_125.

Pirogov G. G.¹, Dr. Sci. (Eng.), Professor;
Voronov E. T.¹, Dr. Sci. (Eng.), Professor;
¹ Transbaikal State University, Chita, Russia.

1. Kuz’min E. V., Svyateckij V. S., Markovec V. V. Thickening of waste from processing of uranium ores to obtain paste for underground placement. Gornyj zhurnal. 2018. no. 7. pp. 73—77. [In Russ]

2. Sheshpari M. A. Review of Underground Mine Backfil Methods with Emphasis on Cemented Paste Backfil. Electronic Journal of Geotechnical Engineering. 2015 Vol. 20, no. 13. pp. 183—208.

3. Pimentel B. S., Gonzalez E. S., Barbosa G. N.O. Decision-support models for sustainable mining networks: fundamentals and challenges. Journal of Cleaner Production. 2016. Vol. 112. pp. 145—157.

4. Matani A. G., Doifode S. K. Effective industrial waste utilization technologies towards cleaner environment. International Journal of Chemical and Physical Sciences. 2015. Vol. 4. no. 1. pp. 536—540.

5. Sheshpari M. A. Review of underground mine backfilling methods with emphasis on cemented paste backfill. Electronic Journal of Geotechnical Engineering. 2015. Vol. 20. no. 13. pp. 183—208.

6. Belousov A. S. Optimization of laying operations at the uranium mine of PJSC “ppgho”. MIAB. Mining Inf. Anal. Bull. 2015. no. 8. pp. 17—20. [In Russ]

7. Krupnik L. A., Shaposhnik Yu. N., Shaposhnik S. N. Development of the technology of filling operations at the projected Novo-Leninogorsk mine. MIAB. Mining Inf. Anal. Bull. 2015. no. 8. S. 25—33. [In Russ]

8. Dik Yu. A., Kotenkov A. V., Tankov M. S. Praktika opytno-promyshlennyh ispytanij tekhnologii razrabotki rudnyh mestorozhdenij [Practice of experimental-industrial testing of technology for the development of ore deposits]. Ekaterinburg: Izd-vo Ural. un-ta, 2014. 480 p. [In Russ]

9. Pirogov G. G., Medvedev V. V., Podoprigora V. E., Popov S. V. Rational technology of underground mining of uranium ores of medium stability. Gornyj zhurnal. 2018. no. 7. pp. 35—39. [In Russ]

10. Shvarc Yu. D., Semigin R. I., Zicer I. S. etc. Waste-free mining and processing production on the basis of underground complexes. Gornyj zhurnal. 1992. no. 5. pp. 42—45. [In Russ]

11. Ajnbinder I. I., Ovcharenko O. V. Vybor parametrov elementov sploshnoj sloevoj sistemy razrabotki s zakladkoj. Teoriya i praktika razrabotki rudnyh i nerudnyh mestorozhdenij [Selection of parameters of elements of continuous layer development system with backfill. Theory and practice of development of ore and non-metallic deposits]. Moscow: IPKON AN SSSR. 1986. pp. 146—155. [In Russ]

12. Patent RF no. 2327038. Sposob razrabotki slozhnostrukturnyh krutopadayushchih moshchnyh i srednej moshchnosti rudnyh mestorozhdenij. Pirogov G. G. Opubl. 20.06. 2008 Byul. no. 17. [In Russ]

13. Patent RF no. 2393355. Sposob zakladki vyrabotannogo prostranstva. Pirogov G. G., Laevskij D. N. Opubl.27.06.2010 Byul. no. 18. [In Russ]

14. Pirogov G. G. Improvement of stowing works in the development of steeply dipping thick ore deposits by layer excavation of inclined cuts. MIAB. Mining Inf. Anal. Bull. 2008. no. 7. pp. 300—303. [In Russ]