Geomechanical aspects of formation of natural stresses in a concrete mount of a shaft shaft

Authors: Sentyabov S.V.

In the presented studies, the laws of the formation of natural stresses in the rock mass are confirmed, which are the sum of gravitational, static tectonic and variable components that have a variable value as a result of uniform periodic volume expansion and contraction of the Earth. The problem of trunk stability is due to the need to solve problems to determine the level of stress-strain state and strength properties in concrete supports. The stress parameters in the lining of the shafts and the monitoring of their changes are determined using a new method for measuring unloading strains. When comparing the stresses obtained experimentally by analytical methods in the concrete support of mine shafts from 2013 to 2019 at experimental test sites in the support having the lengths of bases of 1600 and 70 mm, provided that the number of geoblock ranks at this base is two, a connection with the results of measurements in an array of rocks based on 50 m with an average size of structural blocks of 0.5 m and an investment coefficient of  = 5, which corresponds to three ranks of geoblocks. In practice, it is proposed to use the main identified provisions, namely: the stress state of the mine shaft lining, which is formed as a function of their structural parameters, the full tensor of gravitational tectonic stresses acting in the rock mass at the time of the start of research and time variables, which are determined by natural and analytical methods.

Keywords: concrete support of trunks; stress-strain state; dislocation; stability; slot unloading; unloading deformations; physical and mechanical properties.
For citation:

Sentyabov S.V. Geomechanical aspects of formation of natural stresses in a concrete mount of a shaft shaft. MIAB. Mining Inf. Anal. Bull. 2020;(3-1):199-207. [In Russ]. DOI: 10.25018/0236-1493-2020-31-0-199-207.


Research was carried out according to the state task № 075-00581-19-00 on the topic № 0405-2019-0007.

Issue number: 3
Year: 2020
Page number:
Article receipt date: 21.11.2019
Date of review receipt: 21.02.2020
Date of the editorial board′s decision on the article′s publishing: 20.03.2020
About authors:

Sentyabov S.V., Cand. Sci. (Eng.), Senior Researcher, The Institute of Mining of the Ural branch of the Russian Academy of Sciences, 620075, Ekaterinburg, Russia.

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