scholarly journals MATHEMATICAL MODELING OF STRESS-STRAIN STATE OF THE ROCK MASS IN THE VICINITY OF SUPPORTED CIRCULAR OPENING NEAR THE INTERFACE OF ROCKS WITH DIFFERENT DEFORMATION CHARACTERISTICS

2019 ◽  
Vol 6 (1) ◽  
Keyword(s):  
Mathematical Modeling ◽  
Rock Mass ◽  
Strain State ◽  
Deformation Characteristics ◽  
Circular Opening ◽  
Stress Strain ◽  
Stress Strain State

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

2021 ◽  
pp. 57-63
Author(s):  
A.K Matayev ◽  
V.H Lozynskyi ◽  
A Musin ◽  
R.M Abdrashev ◽  
A.S Kuantay ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Rock Mass ◽  
Mine Working ◽  
Strain State ◽  
Processing Plant ◽  
Underground Structures ◽  
Stress Strain ◽  
Initial Stress Field ◽  
Stress Strain State ◽  
Mine Workings

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 10th 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.

scholarly journals Research into stress-strain state of the rock mass condition in the process of the operation of double-unit longwalls

2020 ◽  
Vol 14 (2) ◽  
pp. 85-94
Author(s):  
Roman Dychkovskyi ◽  
Iaroslav Shavarskyi ◽  
Pavlo Saik ◽  
Vasyl Lozynskyi ◽  
Volodymyr Falshtynskyi ◽  
...  
Keyword(s):  
Rock Mass ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Rock Mass Condition

Experience of CAE Fidesys application in numerical geomechanical modelling of Zhdanovskoe deposit

2022 ◽  
pp. 94-98
Author(s):  
L.K. Miroshnikova ◽  
A.Yu. Mezentsev ◽  
G.A. Kadyralieva ◽  
M.A. Perepelkin
Keyword(s):  
Rock Mass ◽  
Large Scale ◽  
Strain State ◽  
Raw Material ◽  
Mining Method ◽  
Stress Strain ◽  
Stress Strain State ◽  
Ore Bodies ◽  
Sublevel Caving ◽  
Murmansk Region

The Zhdanovskoe copper-nickel sulfide ores deposit is located in the north-west of the Murmansk region and is a mineral raw material source for JSC «Kola MMC». The main mining method used is sublevel caving. In some areas, due to the complex shape of the ore bodies, the open stoping mining method is used which requires determining stable parameters of stopes and pillars. It is necessary to study the stress-strain state of the deposit to ensure safe mining conditions. One of the possible solutions is the modeling of the stress-strain state of rock mass using the finite element method, for example, CAE Fidesys, which is FEMbased software. The use of CAE Fidesys for solving geomechanics tasks allows creating models of individual excavation units to determine the stability of stopes and pillars, and large-scale models that include several ore bodies and areas of the host rock mass. The article considers solutions of both types of geomechanic tasks using CAE Fidesys for conditions of the Zhdanovskoe deposit.

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