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Influence of watering filled-up rock massif on geomechanical stability of the cyclic and progressive technology line

Journal: Mining of Mineral Deposits (Vol.10, No. 2)

Publication Date:

Authors : ; ; ; ;

Page : 55-63

Keywords : cyclical-and-continuous technology (CCT); open pit slope stability; stability of fill-up rock mass; landslide; rock mass water content; stability margin; Mohr-Coulomb failure criterion;

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Purpose.Comprehensive assessment of the fill slope stability for cyclical-and-continuous technology (CCT) conveyors applied to rocks of stripping at Pervomaiskiy quarry of PJSC “Severnyi GOK” to justify effective anti-landslide measures. Methods. To study geomechanical stability of fill-up rock mass and slopes of the CCT line, the following methods are used: hydrogeological analysis, visual observation of the object, numerical modeling of the fill slope stability in the finite element analysis software Phase2. Findings. Calculations of the fill slope stability for the open belt conveyor gallery, the bases of the embankment mass and pit wall slopes show that the fill-up mass stability is conditioned by the complex effect of geological, hydrogeological and anthropogenic factors. The geometrical parameters of CCT facilities and physical-mechanical properties of the embankment rocks play a key role in ensuring the stable operation of the CCT line and its sustainability. The numerical modeling of different options to strengthen the slopes of the fill-up mass is carried out, the most effective tech-niques for these purposes turned out to be surcharges, different in geometry, and retaining prisms of rocks. Originality. The stability margins (SM) for the fill-up mass and slopes on cross-section profiles considering physical and mechanical properties of the complex-structured fill-up mass, its water content and loads of mining equipment are calculated. The areas most subjected to geomechanical deformations and displacements are identified. Practical implications. Based on the simulation results, anti-landslide measures are developed to ensure the stable operation of the CCT complex and stability of the embankment slopes and the pit walls.

Last modified: 2016-07-04 05:26:46