Photomechanical investigation of the stress—Strain state of a precast-block support in a mine working

1980 ◽  
Vol 16 (1) ◽  
pp. 6-10
Author(s):  
V. F. Trumbachev ◽  
O. K. Slavin ◽  
G. K. Kuchuashvili
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

The Influence of the Central Prop Stays of the Strengthening Support on the Fastening System Stress-Strain State of Mine Working

2020 ◽  
pp. 90-105
Author(s):  
V. Bondarenko ◽  
I. Kovalevska ◽  
H. Symanovych ◽  
M. Barabash ◽  
V. Chervatiuk ◽  
...  
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals Assessment of the mutual influence of deformation-strength characteristics of the fastening system elements

2019 ◽  
Vol 123 ◽  
pp. 01006 ◽  
Author(s):  
Iryna Kovalevska ◽  
Zenon Pilecki ◽  
Oleksandr Husiev ◽  
Vasyl Snihur
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Mutual Influence ◽  
Strength Characteristics ◽  
Stress Strain ◽  
Load Bearing ◽  
Stress Strain State ◽  
Operation Modes ◽  
Mine Workings ◽  
Rigid Element

The degree of influence has been determined of diversified deformation-strength characteristics of load-bearing elements in the fastening system of the preparatory mine workings, while maintaining them in a laminal massif of soft rocks. The analysis has been performed of multivariate computational experiments of the stress-strain state of the load-bearing elements of the fastening system in the preparatory mine workings from the position of the mutual influence of their deformation-strength characteristics and the support loading as a whole. An analysis is represented of the mutual influence of the operation modes of the mine working support elements between themselves and the fastening system as a whole; it has been studied the stress-strain state of the mine working fastening system with a central hydraulic prop stay, as well as a significant increase in reliability of the support performance has been analysed and determined. The tendency has been substantiated of minimizing the load on the mine working fastening system – increasing the coherence of the diversified operation modes of fastening elements by enhancing preferentially the yielding property of the rigid element. The application has been substantiated of the central yielding prop stays of the strengthening support of a frame in case of intensive rock pressure manifestation in the zone of the stope works active influence.

scholarly journals Research of stress-strain-state and mine working support on ultradeep horizons

2013 ◽  
Vol 7 (1) ◽  
pp. 35-39
Author(s):  
I Kovalevskaya ◽  
◽  
V Snigur ◽  
R Svistun ◽  
◽  
...  
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

scholarly journals STUDYING STRESS-STRAIN STATE OF BORDER CARBON MASSIF AROUND MINE WORKING WITH ROOF BOLTING

Ugol ◽  
2019 ◽  
pp. 72-77
Author(s):  
V.F. Demin ◽  
◽  
V.S. Portnov ◽  
T.V. Demina ◽  
A.Ye. Zhumabekova ◽  
...  
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Roof Bolting ◽  
Stress Strain State

Stress-strain state in the corner region of a bed with a mine working

1995 ◽  
Vol 31 (1) ◽  
pp. 29-34
Author(s):  
A. A. Baryakh ◽  
N. A. Eremina ◽  
A. N. Mashkin
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Corner Region ◽  
Stress Strain State

scholarly journals Prediction of the stress state of the shotcreting support under repeated seismic load

2021 ◽  
Vol 251 ◽  
pp. 626-638
Author(s):  
Maksim Karasev ◽  
Roman Sotnikov
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Seismic Waves ◽  
Seismic Load ◽  
Deformation Model ◽  
Stress Strain ◽  
Elastic Plastic ◽  
Stress Strain State ◽  
Waves Propagation ◽  
The Impact

The article assesses the impact of repeated blasts on the stress-strain state of the shotcreting support, which negatively affects the bearing capacity of the support and can lead to the formation of local rock falls in places of significant degradation of the shotcreting strength. Despite the fact that a single seismic load usually does not have a significant impact on the technical condition of the shotcreting support, repeated dynamic loading can lead to the development of negative processes and affect the safety. The article considers unreinforced and dispersed-reinforced shotcreting concrete as a shotcreting support. Models of deformation of rock and shotcreting support have been studied. To describe the deformation model of a rock mass, an elastic–plastic model based on the Hook-Brown plasticity condition has been accepted, which accurately describes the elastic-plastic behavior of a fractured medium. When performing the prediction of the stress-strain state of the shotcreting support, a model of plastic deformation of concrete with the accumulation of Concrete Damage Plasticity (CDP) was adopted, which allows to comprehensively consider the process of concrete deformation both under conditions of uniaxial compression and stress, and with minor edging draft. At the first calculation stage, a forecast of the seismic waves propagation in the immediate vicinity of the explosive initiation site was made. At the second stage, forecasts of the seismic waves propagation to the mine working and the stress-strain state of the support were made. On the basis of the performed studies, a methodology for assessing the impact of repeated blasts on the stress-strain state of the shotcreting support of the mine working is proposed.

scholarly journals Research into stress-strain state of reinforced marginal massif of extraction mine working by combined anchoring system

2016 ◽  
Vol 10 (1) ◽  
pp. 31-36 ◽  
Author(s):  
I Kovalevska ◽  
◽  
M Barabash ◽  
O Gusiev ◽  
◽  
...  
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
Anchoring System

scholarly journals Numerical modeling of the stress-strain state of peripheral massif in the vicinity of mine workings

2021 ◽  
Vol 330 ◽  
pp. 01009
Author(s):  
Anastasiya Nikitina ◽  
Dmitriy Borzykh ◽  
Sergey Rib ◽  
Aleksandra Lesnykh ◽  
Tonglin Zhao
Keyword(s):  
Numerical Modeling ◽  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Roof Bolting ◽  
Stress Strain State ◽  
Numerical Studies ◽  
Preparatory Working ◽  
Mine Workings ◽  
Maximum Exposure

In the process of numerical studies, the stress-strain state of the rock massif around the mine working driven at a depth of 600 m was determined. The article presents the analysis of the distribution of total vertical and horizontal stresses isolines in the working roof, as well as the ratio of the residual strength of rocks to the initial. The influence of the roof bolting on the displacement of working contour was established. Dangerous zones in the near-contour rocks of preparatory working were identified. The maximum exposure area of unsecured part of the roof during driving the workings in seam 3-3a was established.

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.

Change in stress-strain state of the edge of a coal bed with increase in depth of a mine working

1992 ◽  
Vol 27 (6) ◽  
pp. 507-510 ◽  
Author(s):  
G. A. Katkov ◽  
R. I. Khaimova-Mal'kova
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Coal Bed ◽  
Stress Strain ◽  
Stress Strain State
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