Stress-Strain State of a Flat Tractive-Bearing Element of a Lifting and Transporting Machine at Operational Changes of its Parameters

Kolosov, Dmytro; Bilous, Olena; Tantsura, Hanna; Onyshchenko, Serhii

doi:10.4028/www.scientific.net/ssp.277.188

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…RS3 Rocscince software embodying the well-known finite element method (FEM) is used to simulate three-dimensional rock stress-strain state (Kolosov, Bilous, Tantsura, & Onyshchenko, 2018) near the cross-heading face and RS2 (PHASE2) is applied to study the twodimensional stress-strain state in plane cross-sections.…”

Section: Numerical (Fem) Simulation Of the Cross-heading Advancementioning

confidence: 99%

Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones

Babets¹,

Sdvyzhkova²,

Shashenko³

et al. 2019

Min. miner. depos.

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Purpose. The paper addresses the rock mass state estimation while excavating a cross-heading through the area of regional fault "Bohdanivskyi" based on probabilistic approach to assessing the rock strength.Methods. The boundaries and fault zone extension are specified based on geological service database. This hazardous fault area has been confirmed, and the expected water inflow and methane emission have been identified based on the probe holes drilled ahead of the advancing face. To assess the strength of rocks, the statistical strength theory is used. Numerical simulation is performed using finite element method that is well-tested in geomechanical problems. Findings.The technique of rock mass strength estimation using structural factor based on statistical strength theory has been implemented to improve the adequacy of mathematical modeling. Numerical simulation of geomechanical processes based on finite element method and Hoek-Brown failure criterion is carried out. The changes of rock stress-strain state while excavating the cross-heading through various sites of the fault zone are determined depending on the level of rock disintegration.Originality. New regularities of rock mass behavior within the fault area are determined based on developed technique of rock strength assessment considering the rock mass disintegration and watering.Practical implications. Estimation of rock failure has resulted in designing the combination of support systems comprising metal sets, rockbolts and shotcrete.

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Section: Numerical (Fem) Simulation Of the Cross-heading Advancementioning

confidence: 99%

Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones

Babets¹,

Sdvyzhkova²,

Shashenko³

et al. 2019

Min. miner. depos.

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“…Thus, the experience of applying a goaf stowing to the mined-out space indicates that prerequisites can be created for solving a whole complex of engineering and technical problems [39] in addition to reducing the number of rocks emitted from mines and improving due to this the ecological situation in coal-mining regions, the successful implementation of the protection of surface objects and the maintenance-free support of preparatory workings.…”

Section: Substantiation Of Ways To Reduce the Negative Consequences Omentioning

confidence: 99%

Ecological aspects of managing the stressed-deformed state of the mountain massif during the development of multiple coal layers

et al. 2018

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The ecological consequences of long-term development of coal deposits for the components of the environment, buildings, communications and infrastructure facilities have been analysed. The stress-deformed state of the rock massif around the preparatory working in the development of multiple coal layers is determined. The parameters of the development of the contiguous layers in the conditions of the mines of the Lviv-Volyn Coal Basin are substantiated. The complex of nature protection measures allowing to reduce the negative consequences of disturbance of the earth’s surface in the development of multiple coal layers is substantiated.

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“…In [8], it has been revealed that after cryogenic treatment, the static strength of synthetic diamonds increases, caused by an irreversible change in the initial stress-strain state of the crystals, due to the ordering of the crystal lattice defective structure. In [9][10][11] a fl at model of the interaction of elements (cables) in a composite product is presented through a material binding them, which has excellent mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Stress state of the grinding tool loaded with tangential force

Zabolotnyi¹,

Belmas²,

Bilous³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. Determining the interaction mechanism of discrete grains through material that binds them in a tool for abrasive material processing in the case of its loading with a tangentially directed cutting force. Methodology. Development and analytical solution to a mathematical model formulated on the basis of static equilibrium of an abrasive grain as a system element of tool grains bound with a material with excellent mechanical characteristics. Findings. A mathematical model has been developed and an algorithm has been formulated to analytically determine the stress-strain state parameters of a tool for abrasive processing of materials, which is loaded with a discrete cutting force, tangential to its working surface. The nature of the dependence of stresses and deformations on mechanical parameters, the quantity of grains and the material binding them in an abrasive tool, loaded with a unit tangential force, has been determined. Originality. The loading of the extreme grains leads to greater displacements, tangents of the shear angles of the material binding the grains. They decrease with increasing quantity of grain rows in the tool or with increasing quantity of grains to the nearest tool edge. Practical value. The distribution of interaction forces of grains and stresses in the material binding them has been determined. The found distribution allows one in the process of developing the tool and technology, in which it is involved, to comprehensively assess the influence of tangential load value of the tool working grain on its stress state and the material containing the grains. The determined stress state makes it possible to predict the number of loading cycles until the simultaneous rational wear of the grain and the destruction of that part of the material that contains it. The linear formulation of the problem makes it possible to take into account the mutual influence of the tangential loads of several grains on the stress-strain state of the tool as a whole.

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Stress-Strain State of a Flat Tractive-Bearing Element of a Lifting and Transporting Machine at Operational Changes of its Parameters

Cited by 10 publications

References 10 publications

Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones

Implementation of probabilistic approach to rock mass strength estimation while excavating through fault zones

Ecological aspects of managing the stressed-deformed state of the mountain massif during the development of multiple coal layers

Stress state of the grinding tool loaded with tangential force

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