Improvement of Technological Approaches to the Use of a Combined Method for Eliminating Sinkholes over Mining Workings

Abstract

Analysis of projects for the elimination of open-pit mine workings in Russia has shown that most accidents associated with damage to the earth's surface are caused by critical values of rock pressure in empty spaces, a decrease in the bearing capacity of supports or their absence, as well as loss of stability of support structures. Rapid removal of the generated sinkholes does not always provide positive results, since often the material for filling them is burnt rock, and it was used without studying the properties of the earth's surface, where it is laid. This circumstance leads to the fact that the dips are re-activated. In this regard, the justification of the parameters of the method of eliminating sinkholes is an urgent scientific and practical task. The problem of stability of the abandoned mine workings, as well as geomechanical and environmental safety in the places where they are located, can only be solved using a systematic approach, which involves solving a set of issues to minimize the impact of each factor in the formation of sinkholes both in space and in time. The article describes the approaches to determining the technological parameters of the combined method of eliminating the sinkholes of mine workings, applied taking into account the geological characteristics of rocks and the mining and technical conditions of their location, the use of which will provide a reasonable calculation of the complex of engineering indicators for guaranteed removal.