E3S Web Conf.
Volume 192, 2020VIII International Scientific Conference “Problems of Complex Development of Georesources” (PCDG 2020)
|Number of page(s)||6|
|Section||Geotechnical and Geomechanical Problems of Development of Mineral Resources|
|Published online||30 September 2020|
Investigation of stress field parameters at deep horizons of the Gayskoye field**
Federal State Budgetary Institution of Science, Institute of Mining of the Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia
* Corresponding authors: email@example.com
** The research was carried out within the framework of the state assignment No. 075-00581-19-00 on the topic No. 0405-2019-0007
The extraction of solid minerals is associated with the penetration of man into the subsoil by creating either relatively simple or extremely complex structures. All mining operations can be safely and efficiently carried out only on the basis of calculating the stability of these structures, which is based on knowledge of the physical and mechanical properties, the stress state of the rock mass and the patterns of their redistribution and formation in mountain structures. The presented studies confirmed the regularities of the formation of natural stresses in the rock mass, which is the sum of gravitational, static tectonic and variable components, which are formed as a result of uniform periodic volumetric expansion and contraction of the Earth. The problem of shaft stability is due to the need to solve problems to determine the level of stress-strain state and strength properties in concrete lining. The parameters of stresses in the shaft lining and monitoring of their changes were determined using the method of measuring unloading deformations. When analyzing the stresses obtained experimentally by analytical means in the concrete lining of mine shafts, a connection was established with the results of measurements in the rock mass on the basis of 50 meters. Based on the experiment, it was confirmed that theoretical and experimental studies prove that a hierarchically blocky massif of magmatic and metamorphic rocks behaves as an elastic and isotropic medium and changes in natural stresses in the massif Δ on the basis of 5-7 ranks of geoblocks, on the contour of the trunk based on 2 –3 ranks of geoblocks and in the concrete lining of mine shafts Δσb obey this law.
Key words: concrete lining of shafts / stress-strain state / drooping / sustainability / crevice unloading / unloading deformation / physical and mechanical properties
© The Authors, published by EDP Sciences, 2020
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