Influence of heading technology on stress state of support in creepable rocks

Authors: Kirienko Y A

The article addresses calculation of loads on lining in vertical mine shafts. Depending on the adopted heading technology, type of support and other parameters, the final support loading is formed. Regarding salt rocks and salt-bearing rocks, the load on the support canchange over the whole service life of an underground opening. With a view to taking a heading technology into account, a stress relaxation factor was determined numerically and analytically in vertical shaft sinking in geological conditions of the Upper Kama potassium–magnesium salt deposit. The applicability of the stress relaxation factor relations in the normative documents is discussed. Based on the curves of elastic displacements of rocks in the time interval of shaft sinking and using the predictive estimates of the further deformation, the need to calculate the values of a* with regard to the rock mass rheology is identified. Since elastic deformations over the whole life Т = 50 years of the shaft reach not more than 10% of the total deformations, the stress relaxation factor is prohibited to exceed this value. The comparative analysis of the adjusting factors a* calculated numerically and analytically is performed, and the algorithm of finding a* for the conditions of shaft sinking in creepable rocks is determined.

Keywords: shaft lining design, heading technology, mine shaft, stress, creep, rock salt, numerical method, finite element method, deformations, stress relaxation factor.
For citation:

Kirienko Yu. A. Influence of heading technology on stress state of support in creepable rocks. MIAB. Mining Inf. Anal. Bull. 2024;(7):38-48. [In Russ]. DOI: 10.25018/ 0236_1493_2024_7_0_38.

Issue number: 7
Year: 2024
Page number: 38-48
ISBN: 0236-1493
UDK: 622.062
DOI: 10.25018/0236_1493_2024_7_0_38
Article receipt date: 27.12.2023
Date of review receipt: 12.02.2024
Date of the editorial board′s decision on the article′s publishing: 10.06.2024
About authors:

Yu.A. Kirienko, Scientific Project Engineer, University of Science and Technology MISIS, 119049, Moscow, Russia, e-mail:, ORCID ID: 0000-0002-4575-7328.


For contacts:

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