Determining the efficiency and parameters of rubble strip reinforcement

Authors

DOI:

https://doi.org/10.15587/1729-4061.2021.235416

Keywords:

rubble strip, bounding surface, metal mesh, physical modeling, strength condition, reinforcement parameters

Abstract

The necessity of development and improvement of methods and means for the protection of preparatory roadways, in particular, protective structures, was proved on the basis of ordinary rock with binding surfaces. Analysis of the results of the study on the use of protective structures of ordinary rock and bounding surfaces was performed. It has shown the feasibility of reinforcing rock structures to ensure operational conditions for the protected roadways. Such structures include rubble strips reinforced with partitions made of metal mesh. To determine their efficiency and reinforcement parameters, studies were performed using provisions of structural mechanics, soil mechanics, and bulk media, as well as physical modeling using natural materials.

According to the results obtained in the performed studies, the efficiency of reinforcement of rubble strips with a metal grid was proved and a procedure for calculation of reinforcement parameters that need to be considered in designing the above structures was developed. Such parameters include width and height of the strip, class of reinforcement, its diameter and tensile strength, size of the grid cells, angle of internal friction of rocks, and diameter of maximum rock pieces in the strip.

It was established that reinforcement of the rubble strip by partitions made of metal meshes can reduce the width of the strip and volume of the rock fill by 1.33…2.66 times without losing the structure rigidity. To do this, the condition of reinforcement strength in grids must be met. It consists of comparing its tensile strength with maximum stresses in the partition. These stresses are determined by the magnitude of the load on the rubble strip from the roof rocks, the diameter of the reinforcement, and the maximum rock pieces, as well as relative extensional strain in reinforcement.

Author Biographies

Serhii Nehrii, Donetsk National Technical University

PhD, Associate Professor

Department of Mining of Mineral Deposits

Andrii Surzhenko, Donetsk National Technical University

PhD, Associate Professor, Dean

Faculty of Mechanical Engineering, Ecology and Chemical Technologies

Тetiana Nehrii, Donetsk National Technical University

PhD, Associate Professor

Department of Mining of Mineral Deposits

Andrii Toporov, Donetsk National Technical University

PhD, Head of Department

Department of Extractive and Processing Complexes Equipment

Eduard Fesenko, LLC Technical University Metinvest Polytechnic

PhD, Associate Professor

Department of Organization and Production Automation

Yevhen Pavlov, LLC Technical University Metinvest Polytechnic

PhD, Associate Professor

Department of Organization and Production Automation

Mykola Domnichev, Kryvyi Rih National University

PhD, Associate Professor

Department of Labor Protection and Civil Security

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Published

2021-06-30

How to Cite

Nehrii, S., Surzhenko, A., Nehrii Т. ., Toporov, A., Fesenko, E., Pavlov, Y. ., & Domnichev, M. (2021). Determining the efficiency and parameters of rubble strip reinforcement. Eastern-European Journal of Enterprise Technologies, 3(7 (111), 74–83. https://doi.org/10.15587/1729-4061.2021.235416

Issue

Vol. 3 No. 7 (111) (2021): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2021 Serhii Nehrii, Andrii Surzhenko, Тetiana Nehrii, Andrii Toporov, Eduard Fesenko, Yevhen Pavlov, Mykola Domnichev

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