On Modelling the Reliability of Concrete Support for Underground Construction Considering the Impact of Chemical Erosion

Konstantin Golovin,Andrey Kopylov,Roman Kovalev,M Tyulenev,S Zhironkin,J Janocko,S Anyona,P Stefanek,A Abay,S Vöth,M Cehlár,D Nuray,A Khoreshok,Y Tan,D Marasová

doi:10.1051/e3sconf/201910501040

Abstract

Ensuring the reliability of support in mine workings has always been one of the most important scientific and technical problems in mining. To ensure the normal operation of underground structures, it is necessary to apply special measures to maintain the support, providing increased stability of rock array. To one of the most important measures is to maintain the reliability of the supports in underground workings and objects of underground construction. The main method of research in this area is the modeling of the reliability of concrete support, as applied to various exogenous and endogenous factors of disturbance. The article provides theoretical provisions of research in physico-chemical processes of corrosion in reinforced concrete for modelling the reliability of structural elements of supports for underground construction objects.

Highlights

Prediction of the durability of reinforced concrete structures on the territory of Russian Federation is carried out according to Federal Standard 2.03.11-85 “Protection of building structures against corrosion.”
In this document there is no regulatory methodology for assessing the durability of reinforced concrete structures in mines, which is associated with the complexity of the physico-chemical processes of corrosion of concrete and the unreliability of predicting the parameters of the underground operating environment
The durability of the reinforced concrete structure under the corrosive effects of the external environment can be conventionally represented as a combination of two periods (T = t1 + t2) [2], which is graphically illustrated in Fig. 1: as the durability T, it is advisable to consider only the term t1, that means neglecting the term t2, since the error in determining the term t2 can be very large

Summary

Introduction

Prediction of the durability of reinforced concrete structures on the territory of Russian Federation is carried out according to Federal Standard 2.03.11-85 “Protection of building structures against corrosion.” in this document there is no regulatory methodology for assessing the durability of reinforced concrete structures in mines, which is associated with the complexity of the physico-chemical processes of corrosion of concrete and the unreliability of predicting the parameters of the underground operating environment. Prediction of the durability of reinforced concrete structures on the territory of Russian Federation is carried out according to Federal Standard 2.03.11-85 “Protection of building structures against corrosion.”. In this document there is no regulatory methodology for assessing the durability of reinforced concrete structures in mines, which is associated with the complexity of the physico-chemical processes of corrosion of concrete and the unreliability of predicting the parameters of the underground operating environment. The most convenient design model for use in mining engineering calculations is one of the results of numerous studies in the field of predicting the durability of concrete or reinforced concrete, namely, the calculated dependence of the depth of corrosion damage on the time of operation of the structure L = f (t) [1]. It is the approach that is used by most researchers, attempts to determine the t2 term more or less reliably have already been made

Materials and Methods

Results and Discussion

Conclusion