Physical and Chemical Geotechnologies

Purpose

Study the possibility of developing the technical and technological justification of combined anchor systems for the maintenance of re-used mining workings in economic effective level.

Methodology

The studies were carried out through the mine experiments and analysis of the geomechanical model of the elements of the preparatory working "massif – frame –combined anchor system".

Findings

Multivariate calculations proved the efficiency of using rope anchors in the supporting system of preparatory workings, which have a multifunctionality in the work of "deep" hardening of the roof rocks, increasing the stability of the frame support and intensifying the end operations in the area of joining the long wall with the working. Recommendations are developed and calculation expressions are obtained for the selection of all the necessary parameters for the installation of a combined anchor system in preparatory workings. The evidence base for cardinal limitation of the manifestations of rock pressure is substantiated due to the formation in the roof of a powerful reinforcing plate with the help of a combined anchor system that provides protection of the frame support against excessive loads and creates conditions for the reuse of preparatory workings. Findings based on researches, which were conducted within the project GP – 493, financed by Ministry of Education and Science of Ukraine.

Keywords: mine experiments, modelling, combined anchor systems

References

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