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DOI 10.21440/2307-2091-2016-4-50-53

THEORY OF CALCULATION OF THE STABILITY OF SLOPES AND BASES. Slope stability in the field of tectonic, seismic and hydrostatic stresses pdf

A. V. Zhabko

Existing methods and means of evaluating the stability of slopes only apply to the so called unstrained mountain masses. In other words this means that in the borders of the region, that includes the mined-out pit, stresses are equal to zero. However this only occurs in massive sedimentary sheaths. At the same time, most of the pits for which the recording of tectonic stress fields is necessary, quite deeply embed into crystalline basement of Earth’s crust. Overwhelming majority of researches point at the presence of natural (tectonic) stress fields in the mountain massif, recording of which is not implemented in a single regimented strength calculation method of pit sides in the capacity of boundary conditions. There are also no uniform justified methods of recording hydrogeological factors and seismicity. All of this justifies the relevance of this type of research. In the first part of the article power loads, which occur under the influence of tectonic, seismic and hydrostatic stresses are provided. In the second part of the work general conditions of slope stability are given (displacement prisms) that is subject to the influence of tectonic stresses, seismicity and hydrogeological impact. Tectonic stress fields impact level on the stability of pit sides slopes in comparison with the gravitational field is analyzed. A conclusion is made on a pretty significant negative contribution of tectonic stresses in the stability of open-pit sides.

Keywords: slope; pit side; tectonic stresses; coefficient of stress concentration; seismic stress; hydrostatic pressure; evaluation of slope stability; sliding surface.

 

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