Rock mass stability estimation in phased mining of Zhdanov lentil reserves by stress–strain modeling data

Extraction of mineral reserves from lentils and lodes of complex geometry by the open stoping method requires optimization of room and pillar parameters and stoping sequence. Safe and complete extraction of lentils can only be ensured given stability of roof rocks in rooms and maintenance of pillar parameters. SW 2 lentil occurs at the South-West ore body of Zhdanov deposit and features a complex geometry. Dimensions of the lentil enable using the open stoping method. Determination of stability conditions for pillar and open stope in this area of Zhdanov deposit is of the current concern. To this effect, we used the 2D elastic stress–strain modeling based on the finite element method. Two models were constructed to describe the vertical cross-sections along and across the strike of the ore body. The stress–strain modeling produced distribution of maximal and minimal stresses and the stable parameters of pillar and open stope.

Keywords: Zhdanov deposit, rock mass stress–strain behavior, stress state modeling, finite elements method, lentil mining, parameters of stopes and pillars, rock mass stability, mining safety.
For citation:

Kulkova M. S., Zemtsovskii A. V. Rock mass stability estimation in phased mining of Zhdanov lentil reserves by stress–strain modeling data. MIAB. Mining Inf. Anal. Bull. 2021;(5— 2):103—110. [In Russ]. DOI: 10.25018/0236_1493_2021_52_0_103.

Acknowledgements:
Issue number: 5
Year: 2021
Page number: 103-110
ISBN: 0236-1493
UDK: 622.831
DOI: 10.25018/0236_1493_2021_52_0_103
Article receipt date: 27.01.2021
Date of review receipt: 29.03.2021
Date of the editorial board′s decision on the article′s publishing: 10.04.2021
About authors:

Kulkova M. S.1, PhD student, Junior researcher, m.kulkova@ksc.ru;
Zemtsovskii A. V.1, Cand. Sci. (Eng.), Head of the laboratory;
1 Mining Institute KSC RAS, Apatity, Russia.

 

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