Institute of Mechanics and Seismic Stability of Buildings named after Academician M. T. Urazbaev (Academy of Sciences of Republic of Uzbekistan) (Tashkent, Republic of Uzbekistan):

Sultanov K. S., Chief Researcher, Professor, Doctor of Physical and Mathematic Sciences, phone: +998 (71) 262-71-32

Loginov P. V., Junior Researcher

State Enterprise «Navoi Mining and Metallurgical Combine» (Navoi, Republic of Uzbekistan):

Khalikulov E. Kh., Head of Central Mining Department

There are considered the aspects of stability of Muruntau open pit edges and complex of high-angle conveyor KNK-270 during the interconnection of possible seismic loads and dynamic loads, which appear in the conditions of mining operations in open pit. The basic characteristics of dynamic loads were defined on the basis of obtained records of detectors of seismic signals of autonomous seismic monitoring complex, functioning in Muruntau open pit. Both dynamic loads appear because of large scale blasts in open pit, and because of functioning of the conveyor KNK-270. There were defined the amplitudes and frequencies of oscillations of blast and technological loads, which make an influence on open pit's eastern edge, where the conveyor KNK-270 is situated. Parameters of possible seismic loads were also defined on the basis of microseismic zoning methods. There is substantiated that seismic loads are the most significant dynamic loads. Amplitude technological loads are insignificant and constant. However they can cause the oscillations of high-angle conveyor in dangerous directions. That's why, all possible types of dynamic loads should be taken into account during the calculations of eastern edge stability.

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