E3S Web Conf.
Volume 109, 2019International Conference Essays of Mining Science and Practice
|Number of page(s)||7|
|Published online||09 July 2019|
Regularities of stress state of unsupported working occurring in a layered massif
Dnipro National University of Railway Transport named after Academician V. Lazaryan, 49010, Dnipro, Lazaryan Str., 2, Ukraine
2 Al-Balqa` Applied University, Department of civil engineering, 19117, Al-Salt, Jordan
* Corresponding author: firstname.lastname@example.org
The paper defines the regularities of stress state of unsupported working occurring in a layered massif. The relevance of the performed research is substantiated by the importance of determining the stresses of the contour of unsupported working when the elastic modulus of the matrix and the layer is varied. Since the application of analytic methods for this case is complex, we used a numerical finite element method, implemented in the SCAD. We developed a finite-element model of the above working, where the elastic moduli of the matrix and the layer varied greatly, while its position was unchanged (the layer laying in the middle of the working). The results of the numerical analysis allowed us to build the regularities of three stress components. In order to normalize cases of elastic modulus variation, a dimensionless χ -parameter is introduced which characterizes the relation between the elastic modulus of the matrix and the layer. The obtained regularities of the stress state of the χ-parameter have a functional character and allow to determine the stresses on the contour of the unsupportedworking, depending on the relation between the elastic moduli of the matrix and the layer for all possible spectrum of these parameters.
© The Authors, published by EDP Sciences, 2019
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