Self-regulating roof-bolting with the rock pressure energy use

Oleh Khomenko,Ihor Kovalenko,Maksym Kononenko,Denys Astafiev

doi:10.1051/e3sconf/20186000009

Abstract

The perspective of discovery of zonal disintegration phenomenon of rocks around underground mine workings is analyzed. The methodological stages for research of this phenomenon are shown. The physics of zonal disintegration of rocks around underground mine workings is disclosed. There are described the possibilities of advanced entropy method and developed energy method that allow to investigate a phenomenon of zonal capsulation of underground mine workings. The sequence of research of this phenomenon parameters is presented. The order of choice of stable shape and resource-saving support in underground mine workings is substantiated, for the deep horizons of the Kryvorizkyi Iron-Ore Basin mines. The method of parameters calculation of self-regulating roof-bolting in underground mine workings is substantiated, which allows to use the rock pressure energy. The design of a self-regulating roof-bolting is developed, which allows applying metal, polymer and rope bolts. The economic efficiency of rock pressure energy usage is substantiated in case of support setting at great depths in underground mine workings.

Highlights

The problem of physics disclosure of phenomenon of zonal disintegration of rocks around mine workings, which first was discovered in 1972 in the South African mine and in the USSR, Russia, Ukraine, Kazakhstan, the USA, Japan and other countries of the world, for a long time could not find a solution [1 – 3]
The first hypotheses rejected the physical reality of the discovery, but since the 1990s, the new methods which did not describe the mechanisms for the energy zones formation, have been actively used in mining science [4]
Due to the convergence and divergence, the massif resists to mining operations in it and restores the continuity, forming the protective capsule, which consists of the energy zones system [10]

Summary

Introduction

The problem of physics disclosure of phenomenon of zonal disintegration of rocks around mine workings, which first was discovered in 1972 in the South African mine and in the USSR, Russia, Ukraine, Kazakhstan, the USA, Japan and other countries of the world, for a long time could not find a solution [1 – 3]. The first hypotheses rejected the physical reality of the discovery, but since the 1990s, the new methods which did not describe the mechanisms for the energy zones formation, have been actively used in mining science [4]. This phenomenon has been recognized as one of the most difficult problems in mining science, and cannot be described on the basis of the classical laws of physics and geomechanics. It is established that the energy of the safety capsule, formed around the mine working, can be used according to parabolic-and-hyperbolic dependence, the values on which correspond to the reasonable principles: resistance, equilibration, facilitating, elimination and transmission of concentrated energy of the massif on which the proposed technology solutions are based [12]

Methods

Results

Conclusion