Belgorod State University, Belgorod, Russia:

Khramtsov B. A., Professor of a Chair of Engineering Geology and Hydrogeology, Candidate of Engineering Sciences, e-mail: khramtsov@bsu.edu.ru

Rostotseva A. A., Associate Professor of a Chair of Engineering Geology and Hydrogeology, Candidate of Engineering Sciences

This article considers the analytical methods of the slopes` parameters determi-nation in isotropic rock massif, using three design models for overbottom, bottom and underbottom landslides. The definition formula is given for the stability coefficient at the underbottom landslide, considering the operative direction of the shearing and restraining forces. The definition of the slopes` stability coefficient is carried out by means of the computer programs, such as: OtkosKRUG, Otkos1 and Otkos.log.1. The following dependence diagrams are given for three design models:

- the dependance of a conditional slope height from the slope angle;

- the dependance of a conditional width of a possible slidging wedge from the conditional slope height;

- the dependance of a conditional rebound width from the conditional height of the slope (this diagram was constructed, using the developed program OtkosKRUG).

The presented diagrams make possible the efficient choice of the bank slopes` parame-ters of pit edges and dumps` layers without using the computer.

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2. Metodicheskie ukazaniya po opredeleniyu uglov naklona bortov, otkosov ustupov i otvalov stroyashchikhsya i ekspluatiruemykh karerov (Guidances on the determination of the slope angles of the edges, bank slopes and dumps of the built and exploitated open pits). Leningrad : VNIMI, 1972, 164 p.

3. Popov V. N., Shpakov P. S., Yunakov Yu. L. Upravlenie ustoychivostyu karernykh otkosov : uchebnik dlya vuzov (Control of the pit slopes stability : tutorial for universities). Moscow : Gornaya kniga, 2008, 683 p.

4. Gordeev V. A. Izvestiya Vuzov. Gornyy Zhurnal — Proceedings of Universities. Mining Journal, 2008, No. 2, pp. 54–64.

5. Svidetelstvo o gosudarstvennoy registratsii programmy dlya EVM No. 2008615512 Otkos1 (Certificate of the state registration of the computer program No. 2008615512 Otkos1).

6. Svidetelstvo o gosudarstvennoy registratsii programmy dlya EVM No. 2009616344 Otkos.log1 (Certificate of the state registration of the computer program No. 2009616344 Otkos.log.1).