Forecast of the position of the displacement zone when using systems with a fixed space

The characteristics of the geological structure of the Mir kimberlite pipe, which being developed by the JSC ALROSA, are presented, options for further post-emergency mining of deep horizons of the field are presented. Methods for estimating the parameters of the shear zone developing near the mined-out space filled with the hardening mixture are described. The relevance of predicting the position of the boundaries of the zone of hazardous displacements when using systems with a hardening backfill of mined out is substantiated, due to the fact that the current regulatory documents allow assessing the parameters of the displacement process only for mining systems with collapse, despite the fact that with depth (in conditions of incomplete underworking) the angles of movement become steeper. The developed methodology for calculating the parameters of displacement zones shown on the example of the development of deep reserves of the «Mir» underground mine of PJSC ALROSA. Parallel drawn between the results of field surveying measurements obtained at the «Internatsionalny» underground mine and the results of calculations of the boundary of the hazardous movement zone at the «Mir» underground mine, both deposits are located in the same kimberlite field and are developed by systems with hardening backfill of mined-out space. The presented calculation methodology significantly reduces the boundaries of the zone of hazardous displacements, which, in turn, has a positive effect in the design of underground workings in terms of their location in the near-ore space.

Bokiy I. B., Zoteev O. V., Pul V. V. Forecast of the position of the displacement zone when using systems with a fixed space. MIAB. Mining Inf. Anal. Bull. 2022;(5—2):48—57. [In Russ]. DOI: 10.25018/0236_1493_2022_52_0_48.

Bokiy I. B¹, Cand. Sci. (Phys. Mathem.), head of the laboratory of Geomekhanics, bokiyib@ alrosa.ru;
Zoteev O. V¹, Dr. Sci. (Tekh), Professor, Chief Researcher of the Laboratory of Geomechanics, zoteev.o@mail.ru;
Pul V. V.¹, Chief Specialist of the Laboratory of Geomechanics, pulvv@alrosa.ru;
¹ Yakutniproalmaz Institute of OJSC ALROSA (JSC), Mirny, the Republic of Sakha (Yakutia), Russia.

Bokiy I. B., email: bokiyib@alrosa.ru.

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