On the informativeness of the shock pulse method for controlling the geocomposite constructions strength

Liliia Prokhorets,A Bulat,O Voloshyn,Y Kryzhanivskyi,B Liu,V Heyets

doi:10.1051/e3sconf/201910900072

Abstract

This article shows the possibility of using the shock impulse method widely used in the building industry for the control of above-ground concrete structures in relation to elements of underground geocomposite protective constructions. As a result of experimental studies performed in the laboratory on various mortar mixtures that harden, it was established that there is a close correlation relationship between two data arrays: the values of the shock pulse duration and the uniaxial compression strength. The reliability of the obtained regression equations is in the range of 0.82 - 0.9. This shows the possibility of using the shock pulse method in the new version, with the previously unused informative parameter - the shock pulse duration for assessing the strength of mortar mixes that harden, which are widely used to create geocomposite constructions.

Highlights

One of the promising ways to improve the sustainability of the workings located in a blockstructured environment is the directional change in the properties of the rock massif by creating geocomposite protective constructions
The widespread use on underground uranium-mining enterprises of bookmarks that harden, the introduction of new high-adhesive binders, reinforced concrete and steelpolymer supports, the combination of which creates a geocomposite constructions with unique properties in the rock massif, with a simultaneous intensification of mining operations, put forward new, more stringent requirements for monitoring and diagnostics the state of the geomechanical system "massif - support and protective constructions." When reinforcing the rock massif with the use of geocomposite constructions, the need arises for the operational control of their condition
As a result of experimental studies performed in the laboratory on various mortar mixtures that harden, it was established that there is a close correlation relationship between two data arrays: the values of the shock pulse duration and the uniaxial compression strength

Summary

Introduction

One of the promising ways to improve the sustainability of the workings located in a blockstructured environment is the directional change in the properties of the rock massif by creating geocomposite protective constructions. The creation of a geocomposite is achieved in various ways, for example, by injecting a solution that harden into the massif or by tamponage a mounting space, by cementation and concrete spraying, using bookmarks that harden, etc. Cementation of fractured rock massif is a traditional technical solution to increase its carrying capacity In this case, the matrix and the reinforcing element are similar in their physical and mechanical properties. Poljakov of National Academy of Sciences of Ukraine [4]

Methods

Results

Conclusion