ZONING OF THE SOLYKAMSK MINE TERROTORY (PERM KRAI, RUSSIA) BY THE GEOHAZARD DEGREE OF MINING THE POTASSIUM SALT DEPOSIT

Yu.A. Mamaev, A.A. Yastrebov

Sergeev Institute of Environmental Geoscience, Russian Academy of Sciences, Ulanskii per. 13, str. 2, Moscow, 101000 Russia.
E-mail: mamaev47ya@mail.ru

The paper is devoted to the assessment of geological conditions and the prediction of development of hazardous technonatural processes in the undermined territory of Solikamsk town and the adjacent regions located in the center of the greatest in Russia potassium salt deposit. The studied region is characterized by the complicated multi-level fault-blocky structure of bed rock massifs and complex engineering geological conditions. Hazardous geological processes are active there, i.e., seismicity ranging from 3 to 7 (MSK-64 scale), karst, suffusion, settling and collapses of the surface, waterlogging and flooding of territories, erosion, ecological processes, etc. The regarded area encompasses operating mines with huge subsurface workings, major industrial enterprises with harmful production and diversified facilities. Vast areas of surface subsidence have been formed there, and technogenic accident took place in 1995 and 2014.

On the basis of engineering geological interpretation of geological survey results and complex monitoring observations in mine workings and on the earth surface, the schematic map has been compiled of zoning the salt mine territory by the conditions subsurface development of potassium salt deposits. The natural risk-forming factors have been revealed as well as the zones of manifestation and types of geohazards that influence mining operations. The work is aimed at mitigating the hazard of negative process development and minimizing the losses from possible accidents at the mines.

Keywords: potassium salt deposit, mining, territory zoning, geohazard degree, karst-suffosion collapses, surface subsidence.

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