Validation of safe underground ore mining with regard to large tectonic faults

The stress–strain modeling and analysis results are presented as a case-study of underground mining in Oleny Ruchei apatite–nepheline deposit in the southeast of the Khibiny Massif. The modeling took into account the mountainous terrain, parameters of ore bodies and large faults, as well as the in-situ data on stresses and strains. The Massif is composed of strong and brittle rocks, and is subjected to high tectonic stresses, which conditions the rockburst hazard of the deposit. The authoring model enables forecasting geomechanical situations at different stoping configurations for a few years ahead. The multivariate stress–strain analysis in step-by-step mining is implemented in application Sigma GT using 3D finite element method. As a result of the stress pattern examination, alternatives of access cutting and mining advance at low geomechanical risk are proposed for the conditions of the test deposit. The safest mining sequence chosen can eliminate work stoppage because of confining pressure-induced dynamic events, as well as can cut down expenses connected with destressing activities and support installation in underground openings.

Keywords: tectonic stresses, strong rock mass, rockburst-hazardous deposit, stress–strain behavior, underground mining, numerical modeling, faults.
For citation:

Semenova I. E., Avetisian I. M. Validation of safe underground ore mining with regard to large tectonic faults. MIAB. Mining Inf. Anal. Bull. 2021;(10):90-99. [In Russ]. DOI: 10.25018/0236_1493_2021_10_0_90.

Acknowledgements:
Issue number: 10
Year: 2021
Page number: 90-99
ISBN: 0236-1493
UDK: 622.831.232
DOI: 10.25018/0236_1493_2021_10_0_90
Article receipt date: 24.02.2021
Date of review receipt: 13.05.2021
Date of the editorial board′s decision on the article′s publishing: 10.09.2021
About authors:

I.E. Semenova1, Cand. Sci. (Eng.), Head of Department, e-mail: i.semenova@ksc.ru,
I.M. Avetisian1, Cand. Sci. (Eng.), Senior Researcher,
1 Mining Institute, Kola Scientific Centre of Russian Academy of Sciences, 184209, Apatity, Russia.

 

For contacts:

I.E. Semenova, e-mail: i.semenova@ksc.ru.

Bibliography:

1. Sashurin A. D. Generation of stresses and strains in structural hierarchies of blocks in rock masses. Problemy nedropol'zovaniya. 2015, no. 1 (4), pp. 38—44. [In Russ].

2. Brun J.-P., Sokoutis D. Core complex segmentation in North Aegean, a dynamic view. Tectonics. 2018, vol. 37, no. 6, pp. 1797—1830. DOI: 10.1029/2017TC004939.

3. Seminskiy K. Zh., Kozhevnikov N. O., Cheremnykh A. V., Pospeeva E. V., Bobrov A. A., Olenchenko V. V., Tugarina M. A., Potapov V. V., Burzunova Yu. P. Interblock zones in the crust: Internal structure and geophysical fields. Triggernye effekty v geosistemakh. Materialy Vserossiyskogo seminar-soveshchaniya [Trigger Effects in Geosystems: Russian Conference Proceedings], Moscow, GEOS, 2010, pp. 300—309. [In Russ].

4. Wenli Yao, Mostafa Sharifzadeh, Zhen Yang Assessment of block size distribution in fractured rock mass and its influence on rock mass mechanical behavior. AIP Advances. 2020, vol. 10, no. 3, article 035124.

5. Stavropoulou M. Discontinuity frequency and block volume distribution in rock masses. International Journal of Rock Mechanics ond Minings Sciences. 2014, vol. 65, pp. 62—74. [In Russ]. DOI: 10.1016/j.ijrmms.2013.11.003.

6. Singgih Saptono, M. Rahman Yulianto, Vega Vergiagara, Herry Sofyan Rock mass classification for sedimentary rock masses in Indonesia coal mining areas. AIP Conference Proceedings. 2020, vol. 2245, no. 1, article 090012. DOI: 10.1063/5.0007049.

7. Khachay O. A., Khachay O. Yu. New monitoring systems for mine seismicity validation with regard to hierarchical heterogeneity of rock masses. Problemy nedropol'zovaniya. 2017, no. 4 (15), pp. 89—95. [In Russ].

8. Pozhilenko V. I., Gavrilenko B. V., Zhirov D. V., Zhabin S. V. Geologiya rudnykh rayonov Murmanskoy oblasti [Geology of ore fields in the Murmansk Region], Apatity, Izd-vo KNTS RAN, 2002. 359 p.

9. Upravlenie gornym davleniem v tektonicheski napryazhennykh massivakh. Ch. 1 [Ground control in rock masses under tectonic stresses], Apatity, Izd-vo KNTS RAN, 1996. [In Russ].

10. Kaspar'yan E. V., Savchenko S. N. Stress–strain behavior assessment in rock mass based on the concept of structural hierarchy of blocks in the crust. Theory and Practice of Geomechanics for Effectiveness the Mining Production and the Construction. Proceedings of the IV-th International Geomechanics Conference. Varna, 2010, pp. 183—191.

11. Ukazaniya po bezopasnomu vedeniyu gornykh rabot na mestorozhdeniyakh, sklonnykh i opasnykh po gornym udaram (mestorozhdenie «Oleniy ruchey») [Guideline on safe mining in rockburst-hazardous conditions (Oleny Ruchei deposit)], Apatity, Gornyy institut KNTS RAN, AO «SZFK», 2015. 101 p. [In Russ].

12. Kozyrev A. A., Semenova I. E., Zemtsovskiy A. V. Geomechanical validation of safe parameters and sequence for underground mining in promising field of Oleny Ruchei. MIAB. Mining Inf. Anal. Bull. 2010, no. 9, pp. 289—296. [In Russ].

13. Semenova I. E., Zemtsovskiy A. V., Pavlov D. A. Integrated geomechanical survey of rockburst-hazardous deposit Oleny Ruchei subjected to underground mining. MIAB. Mining Inf. Anal. Bull. 2014, no. 4, pp. 46—55. [In Russ].

14. Zhirov D. V. Khibiny foidolite zone tectonics and discovery potential of new apatite deposits. Fundamental'nye problemy tektoniki i geodinamiki. Materialy LII Tektonicheskogo soveshchaniya [Basic Problems of Tectonics and Geodynamics: LII Tectonic Conference Proceedings], Moscow, GEOS, 2020, pp. 223—228. [In Russ].

15. Kozyrev A. A., Enyutin A. H., Mal'tsev V. A., Semenova I. E. Regional rockburst hazard and rock mass condition forecast procedure and selection of engineering solutions for safe and efficient mining. Innovatsionnyy potentsial Kol'skoy nauki [Innovative Potential of Kola Science], Apatity, KNTS RAN, 2005, pp. 52–56. [In Russ].

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