№57-7

Conduction and analysis of results of computational experiments to determine the effectiveness functioning structures section powered supports

V. Fomychov¹, V. Sotskov¹

¹Dnipro University of Technology, Dnipro, Ukraine

Coll. res. pap. nat. min. univ. 2019, 57:75-86

https://doi.org/10.33271/crpnmu/57.075

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ABSTRACT

Purpose.The purpose of the system analysis of the state of the roof of the clearing generation and load distribution in the structural elements of mechanized lining is to determine the system of choosing the optimal configuration of the lining section of the working face based on the prediction of quality indicators of deformation of near-ground rock layers.

Materials and methods.The computational experiment was carried out on the basis of a three-dimensional modeling of the geomechanical system of the clearing generation of the rock mass with a layered array using the finite element method using nonlinear regularities of the change in the stress-strain state of the object under study.

Results.The developed computational models of the geomechanical system made it possible to determine the deformation pattern of the immediate roof of the clearing generation under various schemes for controlling the process of its lowering. Predictions of deformation and destruction of rock layers, obtained from the study of possible patterns of change in the state of the rock mass, were used to organize calculations of the geomechanical system with various designs of mechanized support struts.

Scientific novelty.Using to determine the effectiveness of the selected mounting scheme integrated multi-criteria approach based on measurements of the contour generation and internal efforts of the mounting elements allows you to assess the adequacy of the selected computational scheme when predicting changes in the state of the geomechanical system, which is definitely a new technique that evaluates the effectiveness of technological solutions adopted at the underground facilities design stage.

Practical significance. The developed method of determining the optimal design parameters of the section of mechanized lining of the clearing generation allows to comprehensively reduce the cost of carrying out repair and restoration measures and reduce the energy consumption associated with ensuring the efficiency of the stope in difficult mining and geological conditions.

Keywords.rock mass, cleaning development, stress-strain state, lining section, power support, experiment, bookmark.

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