Geocryological Analysis of Rock to Predict Adverse Freeze-and Thaw Effects
L. L. Fedorova, G. A. Kulyandin, D. V. Savvin
Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, 677980 Republic of Sakha (Yakutia), Russia
Keywords: георадиолокация, электротомография, криолитозона, геокриологические условия, криогенные процессы, обводнение, сезонно-талый слой, вскрышные породы, водозащитная дамба, угольный разрез “Кангаласский”, Ground penetrating radar, electrotomography, permafrost zone, freeze-and-thaw activities, cryogenic conditions, water invasion. Seasonal thawing layer, overburden rocks, water retaining dam, Kngalass open pit coal mine
Abstract
The geophysical investigations are carried out at the Kangalass open pit coal mine using the round penetrating radar and electrical tomography. The main frost effects in rock mass and in water retaining dam are described. The investigation procedure is developed, and the wave fields are characterized. The GPR surveys aimed to reveal water invasion zones in a rock block to be blasted and to trace dynamics of a seasonal thawing layer are presented. The integrated analysis of GPR and electrotomography data is performed tod determine adverse freeze-and-thaw processes at the dam bottom. Applicability of GPR in prediction of unfavorable freeze-and-thaw activities is demonstrated.
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