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Substantiating the optimal type of mine working fastening based on mathematical modeling of the stress condition of underground structures

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Category: Content №3 2021

Last Updated on 23 June 2021

Published on 30 November -0001

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Authors:

A.K.Matayev, orcid.org/0000-0001-9033-8002, Karaganda Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

V.H.Lozynskyi, orcid.org/0000-0002-9657-0635, Geological Concern Geobit, Chrzanow, the Republic of Poland

A.Musin, orcid.org/0000-0001-6318-9056, Karaganda Technical University, Karaganda, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

R.M.Abdrashev, orcid.org/0000-0002-2651-5964, Aktobe Regional University named after K.Zhubanov, Aktobe, the Republic of Kazakhstan

A.S.Kuantay, orcid.org/0000-0001-5703-8227, Aktobe Regional University named after K.Zhubanov, Aktobe, the Republic of Kazakhstan

A.N.Kuandykova, orcid.org/0000-0001-7810-7500, Aktobe Regional University named after K.Zhubanov, Aktobe, the Republic of Kazakhstan

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2021, (3): 057 - 063

https://doi.org/10.33271/nvngu/2021-3/057

Abstract:

Purpose. Predicting the formation of a stress-strain state (SSS) in the rock mass within the boundaries of influence of stope operations on the horizon -480 m in axes 2028 at the 10^th Anniversary of Kazakhstans Independence (DNK) Mine.

Methodology. An engineering-geological data on the host rocks properties are analyzed based on the international ISRM standard. Numerical modelling of the rock mass stress-strain state and the calculation of the load-bearing capacity of the compound support (roof-bolt+shotcrete+mesh) and arch support used at the mine are performed with the help of the RS2 software. This program, based on the Finite Element Method in a two-dimensional formulation, makes it possible to take into account a significant number of factors influencing the rock mass state.

Findings. The calculations performed indicate that the support resistance is incommensurably low in comparison with the values of the initial stress field components in the rock mass. In such conditions, it may be more effective to strengthen the mass in the vicinity of mine working than setting more frames or using more massive support profiles.

Originality. The paper presents the results of mathematical modeling and calculation of the stress-strain state of the underground supporting aquifer rock mass structures developed for complex mining-and-geological and geomechanical conditions of driving, supporting and operating mine workings on deep horizons of the mines at Donskoy Ore Mining and Processing Plant. Based on the performed research, the preliminary (advanced) strengthening of the border rock mass in the zone of inelastic (destructive) deformations has been substantiated, as a priority method to control the stability of mine workings.

Practical value. The research results can be used when creating a geomechanical model of the field and designing stable parameters of mine working support.

Keywords: mine, mine working fastening, stress-strain state, zone of inelastic deformations, frame support

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