CHANGING STRUCTURE OF DEFORMATION AREA OF UNDERMINED ROCK LAYER UPON ONE-LAYER MULTICHAMBER MINING OF SALT DEPOSIT

Yu. A. Mamaev *1, A.N. Vlasov **2,
M.G. Mnushkin ¹, P.V. Stol'nikova ¹

¹ Sergeev Institute of Environmental Geoscience RAS, Moscow
² Institute of Applied Mechanics RAS, Moscow
*E-mail: mamaev47ya@mail.ru
**E-mail: iam@iam.ras.ru

The paper presents the results of mathematical simulation of variation in the stress-strain state and the deformation area structure in the undermined rock layer upon the successive multi-chamber mining of the salt layer at the Verkhnekamskoe potassium deposit (VKMKS) within the territory of Solikamsk-Berezniki urban industrial agglomeration (SBGPA). The methodical specifics in the development of geomechanical model and compilation of finite-element calculation scheme are provided with choosing calculation parameters of rock properties and boundary conditions of the calculation area. The peculiar features and parameters of deformation zone structure variation in the undermined rock massif of the above-salt layer are described for the construction of a single chamber and a number of neighbor chambers at the same depth. The research results are important for prediction of hazardous processes and adoption of protective measures at the affected areas.

Key words: potassium salt deposit, engineering geological conditions, stress-strain state, rock massif deformation, undermined massif, mathematical simulation

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