Uralkali, Berezniki, Russia

Yu. S. Shchegolkov, Chief Specialist, rabota.shegolkov@mail.ru
L. O. Tenison, Head of Project and Analysis Management, Candidate of Engineering Sciences

Mining Institute—Branch of the Perm Federal Research Center, Ural Branch, Russian Academy of Sciences, Perm, Russia

A. A. Baryakh, Research Manager, Academician of the Russian Academy of Sciences, Doctor of Engineering Sciences

Angular parameters are the main component of the study of a ground movement process. They are used in the methods of assessing the impact of mining operations on the earth’s surface, and are also used in calculating the required sizes of pillars left for various purposes. The set of angular parameters currently used at the Verkhnekamskoe potassium–magnesium salt deposit is characterized by a number of imperfections, for example, the approaches to the practical use of boundary angles to some extent contradict their purpose, and the angle of complete displacements under conditions of incomplete undermining is used as an intermediate stage in calculating the length of a half-trough and can be replaced by the angle of maximum subsidence. Taking into account the heterogeneity of the geomechanical system formed at the Verkhnekamskoe potassium–magnesium salt deposit in combination with a large number of small safety pillars, it is possible to note the formation of troughs with a complex shape. This circumstance, in the absence of instrumental observations of the earth’s surface displacement, significantly complicates the determination of expected deformations. The solution to the described problem is the approach of combining individual virtual displacement troughs, formed under the influence of each geomechanical zone of mining, into the resulting total form of displacement, which, in turn, creates the need to consider the feasibility of identifying auxiliary angular parameters. This article proposes a justification for a minimum sufficient list of angular parameters necessary for solving the most common engineering and scientific problems in the conditions of mining the deposit under consideration. The obtained research results can be useful for improving the regulatory framework on the topic under discussion.

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