Variations in the Geoelectric Properties of the Rock Masses as a Result of the Seismic Effects of Industrial Explosions

• Published in: IOP conference series. Earth and environmental science 2019-11, Vol.362 (1), p.12120
• Main Authors: Grib, Nicolay N., Uzbekov, A.N., Imaev, V.S., Grib, G.V., Abetov, A.E.
• Format: Article
• Language: English
• Subjects: Careers; Disturbance; Electrical properties; Electrical resistance; Electrical resistivity; Explosions; Fractures; Geoelectricity; Geological faults; Geological structures; Geology; Massifs; Moisture resistance; Rock masses; Rock properties; Rocks; Seismic effects; Tectonics; Wave fronts; Weights & measures
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/362/1/012120

In order to obtain some clarity in the matter of assessing the seismic effects from industrial explosions of the state rock massif. Variations of the electrical properties of rock mass before and after explosions were studied by electro tomography. The monitoring studies on the experimental profile selected across the strike one of the regional faults that cut across the career field of the Neryungri was conducted. Observations were made before the explosion, immediately after the explosion, and subsequent observations at intervals of one hour. The electrical resistance increases in the rock mass of tectonic disturbance on the geological structure, which located on the side of the explosion. The electrical resistance decreases in the fault zone, some changes in the electrical resistance of the hanging geological structure. It has been found that the spatial orientation of the fracturing of the rock mass affects the pattern of change in the geoelectric properties of the rock mass. The electrical properties changes in the rock mass from the location of the explosion block in concern to the direction of fracture of the rock mass. In the case when the front of the blast wave propagates along the strike of fractures, the fractures open and the intensity of moisture migration increases significantly, which involve a significant decrease in electrical resistance not only in the zone of tectonic disturbance but also in the underlying geological structure. When the wave front propagates perpendicularly to the stretch of rock mass fractures, cracks also close and moisture migration along the cracks caused by changes in the stress-strain state of the rock mass, is not significant, which is reflected in a slight change in the geoelectric properties of the rock mass in the section of the profile under study.