TO ASSESS THE DANGER OF KARST-SUFFUSION PROCESSES

Abstract

The relevance of the research is caused by the search for predictive parameters and criteria for changes in the electrical properties of rocks associated with the dissolution and removal of rock particles in areas with the spread of deposits of carbonate-sulfate composition. In addition, the use of geophysical methods with a one-sided approach to restoring the physical properties of a geological section does not always give an unambiguous assessment of the results obtained. The above facts indicate the need to search for and evaluate the possibilities of integrated solutions to increase the unambiguity of the interpretation of geophysical data and the reliability of forecast calculations. The purpose of the work consists in the development of scientific and methodological foundations of a method for assessing the danger of karst-suffusion processes. The object is represented by an array of rocks in the area of karst-suffusion processes. The methods used to achieve this goal are based on numerical modeling of electric fields, field observations by vertical electric sounding in various azimuthal directions, combined analysis of geological and geophysical data and laboratory studies. The AMS-1 hardware complex and the ZondRes3D, «Zond» software systems were used as tools. The study of electrical resistivity on rock samples was carried out using an original technique without disturbing the structure and humidity of monoliths. The research results reflect a comprehensive analysis of geological and geophysical data, including theoretical calculations in three-dimensional inhomogeneous media, field experiment and verification of the forecast model. Based on a priori information and laboratory data on the properties of the medium, a physico-geological model with weakened areas associated with the removal and dissolution of rocks was compiled. The revealed patterns are the basis for zoning on geometrization of potential areas of development of dangerous karst-suffusion processes and further selection of protective measures to strengthen the rock mass or design solutions.

Keywords

• hazardous processes
• modeling
• karst
• suffusion
• physical properties
• electrical exploration