Research and Stress-Strain State Analysis of the Rock Massif Enclosing the 861 Belt Entry at the Basic and Recommended Schemes of Maintaining

2020 ◽  
pp. 114-135
Author(s):  
V. Bondarenko ◽  
I. Kovalevska ◽  
H. Symanovych ◽  
M. Barabash ◽  
V. Chervatiuk ◽  
...  
Keyword(s):  
Strain State ◽  
Rock Massif ◽  
Stress Strain ◽  
Stress Strain State ◽  
State Analysis

scholarly journals Predicting the Stress-Strain State of the Fractured Rock Massif on the Example of Interchamber Pillars

2019 ◽  
Vol 9 (2) ◽  
pp. 4228-4233
Keyword(s):  
Strain State ◽  
Numerical Models ◽  
Fractured Rock ◽  
Strength Properties ◽  
Rock Massif ◽  
Qualitative Description ◽  
Stress Strain ◽  
Stress Strain State ◽  
Geological Surveys ◽  
Spatial Geometry

The article describes the finding of the qualitative differences in the formation of the stress-strain state of a disturbed rock massif on the example of interchamber pillars with various methods of accounting for the structural disturbance and different spatial geometry of the cracks. Three numerical models are created with different methods of accounting for the disturbances in the massif continuity: in the first model, the strength of the massif is described by the Hoek and Brown criterion; the second and the third models are rock massifs for which violations in the continuity are formed explicitly, using ready-made templates of the systems of cracks presented in the Phase2 software product. The results obtained for the different models illustrate the inaccuracies occurring in assessing the disturbance of rock massif using score criteria. Models with underrated strength properties of the rock inaccurately describe the real mechanisms of the fractured massif: the qualitative description is not consistent with the results of field observations and geological surveys of rocks in general.

scholarly journals Laws of gas draining in the massif disturbed by mining operations

2019 ◽  
Vol 109 ◽  
pp. 00047
Author(s):  
Serhii Kurnosov ◽  
Volodymyr Zerkal
Keyword(s):  
Strain State ◽  
Abutment Pressure ◽  
Gas Permeability ◽  
Experimental Studies ◽  
Rock Massif ◽  
Gas Release ◽  
Mining Operations ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Impact

A method for calculating gas permeability of the rock massif depending on its stress-strain state is presented. By using methods of the mine experimental studies, influence of mining operations in the adjacent long walls on intensity of gas release from the previously worked-out long-pillar was determined, as well as impact of the massif stress-strain state on efficiency of the drainage boreholes. Formulas were obtained for calculating coefficients of the impact of zones with static and dynamic abutment pressure on intensity of gas draining in the previously worked-out long-pillar.

scholarly journals General Conditions for Estimation of Stress-Strain State of the Rock Massif for Objects of Civilian Potection

2020 ◽  
Vol 2020 (1) ◽  
pp. 224-228
Author(s):  
Petr KUBEČEK ◽  
Nikolaj MOROZOV ◽  
Ondřej FRANEK ◽  
Frantisek PAULUS ◽  
Małgorzata GAWLIK-KOBYLIŃSKA ◽  
...  
Keyword(s):  
Strain State ◽  
Rock Massif ◽  
Stress Strain ◽  
Stress Strain State ◽  
General Conditions

scholarly journals Deformability parameters for forming the stress-strain state models of rock massif

2013 ◽  
pp. 1-12 ◽  
Author(s):  
Ratomir Popovic ◽  
Milenko Ljubojev ◽  
Lidija Djurdjevac-Ignjatovic
Keyword(s):  
Strain State ◽  
Rock Massif ◽  
Stress Strain ◽  
Stress Strain State ◽  
State Models

scholarly journals Algorithm of rock massif stress-strain state calculation when mining a suite of flat coal seams

2015 ◽  
Vol 9 (1) ◽  
pp. 43-53
Author(s):  
Ya.M Nalyvaiko ◽  
◽  
O.A Akimov ◽  
A.P Diachenko ◽  
A.V Pavlychenko ◽  
...  
Keyword(s):  
Strain State ◽  
Rock Massif ◽  
Coal Seams ◽  
Stress Strain ◽  
Stress Strain State ◽  
State Calculation

scholarly journals Computer modeling of volumetric damageability in the mine roadway neighbourhood

Doklady BGUIR ◽  
2020 ◽  
Vol 18 (7) ◽  
pp. 47-54
Author(s):  
S. S. Sherbakov ◽  
L. A. Shemet ◽  
A. A. Nasan
Keyword(s):  
Finite Element ◽  
Computer Modeling ◽  
Solid Body ◽  
Strain State ◽  
Rock Massif ◽  
Limited Area ◽  
Stress Strain ◽  
Cross Sectional ◽  
Stress Strain State ◽  
Mine Roadway

The object of research is a rock massif with various cross-sectional shapes of roadway. The purpose of work: computer modeling of stress-strain state and volumetric damageability in the neighbourhood of a mine roadway. The undisturbed rock massif has an initial stress-strain state (under its own weight) before a mine roadway is formed. Therefore, to determine the stress-strain state of the rock massif with the mine roadway, we must first calculate the stress state of the rock massif without the roadway and then take it into account as a pre-stressed state for the rock massif therewith. Damageability assessment of the rock massif with a mine roadway was carried out based on the obtained distributions of stresses and strains. We calculated volumetric damageability through the model of a deformed solid body with dangerous volume. Dangerous volume is a limited area where stresses or strains exceed the predetermined threshold. Calculation of dangerous volumes and integral damageability was carried out in the finite element package ANSYS. The program was written in APDL. The ratios between the existing and limiting stresses was calculated for each finite element. The elements for which this ratio exceeds unity will form a dangerous volume for the whole model. As a result, we have an array of finite elements constituting the dangerous volume and its value. The developed method for assessing damageability in the mine roadway neighbourhood takes into account various cross-sectional shapes of the mine roadway and its depth. The relevance of studying possible destruction regions using the model of a deformed solid body with dangerous volume was substantiated.

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