Consideration is given to the method of the geometric addition of forces over the most stressed slip surface in estimation of open-pit slope stability. The limits of its application are defined.
The results of modeling and estimation based on the finite element method, of propagation boundaries of horizontal deformations with due account of structural features of rock mass, and also strength and deformational properties of various lithological differences composing the open-pit slope are represented.
With permanent increasing of depth of open pit exploitation stress strain behavior of side array changes, so the choice of the necessary and corresponding to reality geomechanical scheme is an important issue. Currently,there is large number of software to estimation the stability slopes. This article provides a comparison of different programs based on numerical method and the method of limiting equilibrium.
The analysis of graphs shows seismic events repeatability and seismic events distribution during the day, by days of the week and by months was made. It is shown, that seismic activity in Kuzbass region has a mixed natural and manmade character and figures of repeatability have interim character, the majority of seismic events occur in the time of blasting operations in open pit mining, but the distribution by month of the year corresponds to planetary pattern – the larg est number of events takes place in March, August and December. It was suggested that the spring increase in seismic activity lead to reduced stability of mine slopes during the snowmelt of landslides formation.
Estimation of earthquakes seismic effect for slope stability of coal strip mine «Chernigovets» in Kemerovo region by means of pseudo-static analysis and physical modeling is conducted. Relevancy to take into account not only maximum accelerations but also continuance of oscillations is showed.
The review of factors influencing rock mass strength is given. Methods of definition for sample strength changeover to rock mass are considered in the article.