Prediction procedure for sinkholes in terms of the Upper Kama potassium–magnesium salt deposit

Underground mineral mining under conditions of the industrial (or urban) development often induces hazards which can result in deformation of ground surface and in alteration of near surface geological and geotechnical conditions during operation of buildings. This article discusses a methodological framework for assessment of geological and geotechnical conditions, and the prediction procedure of sinkholes during underground mining of potassium–magnesium salts. The research methods include electrical profiling, vertical electric sounding and high-precision monitoring of electrical resistance. The research results are based on the constructed geo-model, its in-situ testing and the revealed objective laws. From the objective laws, the criteria are determined for zoning based on risk of change in the geotechnical conditions and sinkhole hazard. These criteria are waterproof strata quality calculated from digital models, change in the specific electrical resistance from high-precision monitoring and the ground surface subsidence velocity from plane surveying. As a result of the implemented research, the sinkhole prediction procedure has proved its applicability in the tests on forecasting sinkholes at production objects within the Upper Kama potassium–magnesium deposit.

Tatarkin A. V. Prediction procedure for sinkholes in terms of the Upper Kama potassium–magnesium salt deposit. MIAB. Mining Inf. Anal. Bull. 2020;(1):121-132. [In Russ]. DOI: 10.25018/0236-1493-2020-1-0-121-132.

A. V. Tatarkin, Cand. Sci. (Eng.), Head of Department of Geophysical Research,
LLC NIPPPD Nedra, 614064, Perm, Russia, e-mail vsto08@mail.ru.

A. V. Tatarkin, e-mail vsto08@mail.ru

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