Study of Rock Mass Stability Decrease due to Underground Mining


https://doi.org/10.17073/2500-0632-2019-4-251-261

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Abstract

The optimization of underground mining processes is carried out based on rational use of energy for obtaining preset broken ore size. The effective optimization requires correct assessment of the properties of the rock mass to be broken. Energy management requires assessment of rock mass stability decrease due to impact of natural and technogenic stresses. To make adjustments to the general energy management model, information on the rock mass structure is required to be obtained by geophysical methods. To optimize broken rock/ore size (to minimize oversized or excessively crushed mineral fraction yield during breaking), blasting energy application should be regulated and smart. The study is aimed at assessing the effectiveness of using geophysical methods for the prompt and correct assessment of rock and backfill mass condition during underground mining of mineral deposits. Decreasing stability of rock masses is assessed using the method of electrometric surveys in noncore exploratory boreholes. Rock mass stability study allowed revealing correlation and dependencies between the studied parameters. Effectiveness of using geophysical methods for differentiating natural and technogenic masses by degree of decreasing their stability due to geological and technogenic stresses. To determine the coefficient of decreasing rock mass stability based on rock apparent resistivity data, electrometric logging was used. This allowed to differentiate rock mass by the degree of decreasing rock mass stability based on the revealed dependency. The features of the geophysical survey components are described in details. The methodology and findings of the underground electric sounding using a sequential gradient electrode system at specific metal deposit are presented, including using theoretical curves and determining rock conductivity and the distance to workings. Besides, correctness of the geophysical method findings was assessed differentially. The assessment was prepared for decreasing rock mass stability based on electrometric logging data, and for advance outlining heterogeneity zones in rock masses by electric sounding along working walls. Based on findings of the conducted experimental work on revealing structural boundaries within rock mass, the method of electric sounding along working walls was recommended for application in practice. As for the studied borehole electric sounding application, the convergence of the experimental and theoretical curves is insufficient to recommend the method for practical application.


About the Authors

V. I. Golik
North-Caucasian Mining and Metallurgical Institute
Russian Federation
Vladikavkaz


S. A. Maslennikov
Don State Technical University
Russian Federation
Shakhty


Alberto Martin Nunez Rodriguez
Technical University
Dominican Republic
East Sibao


V. I. Anischenko
LLC "Spetsmodulproekt"
United States
New York


References

1. Goodarzi A., Oraee-Mirzamani N. Assessment of the Dynamic Loads Effect on Underground Mines Supports. In: 30th International Conference on Ground Control in Mining. 2011. P. 74–79.

2. Woodward K., Wesseloo J. Observed spatial and temporal behaviour of seismic rock mass response to blasting. Journal of the Southern African Institute of Mining and Metallurgy. 2015;115(11):1044–1056.

3. Golik V.I., Savelkov V.I., Gashimova Z.A., Kelekhsaev V.B. Models of natural and technical systems interaction based on geotechnical sustainability in ore mining. Vector of Geosciences. 2018;(1(2)):21–28. (In Russ.).

4. Golik V., Komashchenko V., Morkun V., Irina G. Increasing effectiveness of explosive rock breakage at mines using new methods for initiating blasthole charges in open pits. Metallurgical and Mining Industry. 2015;7(7):383–387. (In Russ.).

5. Cardu M., Seccatore J., Vaudagna A., Rezende A., Galvão F., Bettencourt J. S., Tomi de G. Evidences of the influence of the detonation sequence in rock fragmentation by blasting. Part I. REM: Revista Escola de Minas. 2015;68(3):337–342.

6. Khani A., Baghbanan A., Norouzi S., Hashemolhosseini H. Effects of fracture geometry and stress on the strength of a fractured rock mass. International Journal of Rock Mechanics & Mining Sciences. 2013;(60):345–352.

7. Kidybinski A. The role of geo-mechanical modelling in solving problems of safety and effectiveness of mining production. Archives of Mining Sciences. 2010;55(2):263–278.

8. Najafi A. B., Saeedi G. R., Farsangi M. A. E. Risk analysis and prediction of out-of-seam dilution in longwall mining. International Journal of Rock Mechanics and Mining Sciences. 2014;70:115–122.

9. Oraee-Mirzamani K., Ping Y. J., Zhong C. W., Sen Y. D., Qiang Y. J. Numerical determination of strength and deformability of fractured rock mass by FEM modeling. Computers and Geotechnics. 2015;64:20–31.

10. Golik V., Komashchenko V., Morkun V., Irina G. Improving the effectiveness of explosive breaking on the bade of new methods of borehole charges initiation in quarries. Metallurgical and Mining Industry. 2015;7(7):383–387. (In Russ.).

11. Molev M. D., Stradanchenko S. G., Maslennikov S. A. Theoretical and experimental substantiation for creating regional systems for technosphere safety monitoring. Journal of Engineering and Applied Sciences of Russian Academy of Technologies. 2015;10(16):6787–6792. (In Russ.).

12. Golik V., Komashchenko V., Morkun V., Zaalishvili V. Enhancement of lost ore production efficiency by usage of canopies. Metallurgical and Mining Industry. 2015;7(4):325–329. (In Russ.).

13. Molev M. D., Stradanchenko S. G., Maslennikov S. A. Theoretical and experimental substantiation of construction regional security monitoring systems technospheric. ARPN Journal of Engineering and Applied Sci-ences. 2015;10(16):6787–6792. (In Russ.).

14. Golik V. I., Savelkov V. I. Gashimova Z. A., Kelekhsaev V. B. On monitoring of rock mass conditions during subsoil use for indefinite period of time. Vector of Geosciences. 2018;(1(2)):48–60. (in Russ.).

15. Semenova I. E., Avetisyan I. M., Zemtsovsky A. V. Geotechnical substantiation of extraction of deep level reserves under complicated mining, geological and geodynamic conditions. Mining Informational and Ana-lytical Bulletin. 2018;(12):65–73. (in Russ.).

16. Kuranov A. D. Technique for predicting rock mass stress-strain state during combined mining of the Koashvinskoye deposit. Mining Journal. 2015;(1):67–71. (In Russ.).

17. Zaalishvili V. B., Burdzieva O. G., Zaks T. V., Kanukov A. S. Informational monitoring of distributed physical fields within an urbanized area. Geology and Geophysics of the South of Russia. 2013;(4):8-16. (In Russ.).

18. Pleshko M., Pankratenko A., Revyakin A., Schekina E., Kholodova S. New technologies for underground structures in restrained urban conditions. In: E3S Web of Conferences. 2018;33:02036. DOI: 10.1051/e3sconf/20183302036. (In Russ.).

19. Dmitrak Yu. V., Logacheva V. M., Podkolzin A. A. Geophysical prediction of broken condition and watering of rock mass. Mining Informational and Analytical Bulletin. 2006;(11):35–36. (In Russ.).

20. Kachurin N. M., Stas G. V., Korchagina T. V., Zmeev M. V. Geotechnical and gas dynamic conse-quences of undermining of mining lease areas for Eastern Donbass mines. Proceedings of Tula State University. Series "Earth Sciences". 2017;(1):170–182. (In Russ.).

21. Kachurin N. M., Stas G. V., Kalayeva S. Z., Korchagina T. V. Geoecological assessment of environ-mental protection effectiveness and environmental protection measures in the process of underground coal mining. Proceedings of Tula State University. Series "Earth Sciences". 2016;(3):62-79. (In Russ.).

22. Dmitrak Yu. V., Logacheva V. M., Podkolzin A.A. Geophysical prediction of broken condition and wa-tering of rock mass. Mining Informational and Analytical Bulletin. 2006;(11):35–36. (In Russ.).

23. Zaalishvili V. B., Burdzieva O. G., Zaks T. V., Kanukov A. S. Informational monitoring of distributed physical fields within an urbanized area. Geology and Geophysics of the South of Russia. 2013;(4):8–16. (In Russ.).

24. Komashchenko V.I., Vasiliev P.V., Maslennikov S.A. Reliable raw material base for KMA deposit un-derground mining. Proceedings of Tula State University, Series "Earth Sciences". 2016;(2):101-114. (in Russ.).

25. Snelling P. E., Godin L., McKinnon S. D. The role of geologic structure and stress in triggering remote seismicity in Creighton Mine, Sudbury, Canada. International Journal of Rock Mechanics & Mining Sciences. 2013;58:166–179.

26. Kaplunov D. R., Rylnikova M. V., Radchenko D. N. Expansion of resources base of mining enterprises based on multiple use of deposit mineral resources. Mining Journal. 2013;(12):29–33. (In Russ.).

27. Gryazev M. V., Kachurin N. M., Zakharov E. I. Tula State University: 85 years in the service of the motherland. Mining Journal. 2016;(2):25–29. (In Russ.).


Supplementary files

For citation: Golik V.I., Maslennikov S.A., Nunez Rodriguez A.M., Anischenko V.I. Study of Rock Mass Stability Decrease due to Underground Mining. Gornye nauki i tekhnologii = Mining Science and Technology (Russia). 2019;4(4):251-261. https://doi.org/10.17073/2500-0632-2019-4-251-261

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ISSN 2500-0632 (Online)