Abstract
The process of dumping on the surface mining is one of the most problematic in terms of industrial safety. The problem is compounded by the fact that the external dumps are often pilled on unprepared base, composed of clay. Therefore, such a situation occurs when a set of external factors leads to considerable deformations of the dumps. In particular, a few years ago on one of Kuzbass open pits there was a major landslide. According to the studies made, the reasons for the landslide were irregularities in the process of stacking, intensive snow melting and continuous heavy rains. All this together led to the deformation of the slope of the lower tiers of the outer dump and to the landslides. This article describes the measures of eliminating the danger zone, designed to prevent further landslides and to ensure safe mining works on external dump. The parameters of grounded prism are discussed and the technology of its piling is offered.
Highlights
From the foregoing we concluded that the main causes of deformation processes are the following: 1) The reduction of structural characteristics and loss of load bearing capacity by the dump’s base as a consequence
At lower value of the safety factor the landslides may occur when the dump is standing without updating more than 1 year
The main reason for the deformation processes are the following: - the structural characteristics reduction and, as a consequence, the loss of bearing capacity by the rocks of the bump’s base which consist of 80% of Quaternary sediments due to increase in their water content under the influence of groundwater unloading of the ravine’s thalweg
Summary
The formation of dump was carried out in two stages along the ravine’s slope with the dip angle of 4-6o. The lower tier of the dump is mostly formed with Quaternary sediments – the loam.
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