Authors: M.A. Vlasov, O.V. Gerasimov, N.Y. Nikulin, S.M. Prostov

Title of the article: Assessment of the karst hazard of the base of the section of the north-western bypass of Kemerovo

Year: 2023, Issue: 4, Pages: 4-14

Branch of knowledge: 1.6.9. Geophysics, geophysical methods of prospecting for minerals

Index UDK: 551.448

DOI: 10.26730/1999-4125-2023-4-4-14

Abstract: The method of conducting a complex of geophysical studies, including seismic exploration, cavernometry, gamma-ray logging, electrocarotage, resistimetry, is described. Seismic surveys were carried out by the method of refracted waves on two profiles with the construction of velocity sections of longitudinal waves. The change in the diameter of the borehole in depth was established by the method of ca-vernometry.Logging by the method of natural gamma activity (GC) was used to isolate intervals of relatively pure and dense, as well as clay differences of these rocks: the most fractured and watered limestones are marked on GC diagrams with low intensity values, on the contrary, clay differences are fixed with maximum values. The resistivimetry method is a good search method for detecting zones of active water exchange characteristic of deep-karst waters. The totality of data on the places of groundwater inflows obtained by the resistivimetric method at a number of wells used to isolate and trace along the profile the boundaries of the zone of active groundwater circulation characteristic of highly fractured rocks. Based on the research results, engineering-geological sections along the axis of the bridge crossing were constructed. The estimation of the karstiess according to the data of geophysical studies for each bridge support is given, while no zones of intensive developed karst formation have been identified.

Key words: seismic exploration cavernometry gamma-gamma logging electrocarotage resistivimetry velocity waves borehole logging engineering and geological sections

Receiving date: 17.05.2023

Approval date: 20.09.2023

Publication date: 27.09.2023

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