Studying of influence of temperature of rocks with varying humidity on GPR data

Abstract

Laboratory research was conducted on rock samples of varying humidity in a refrigerating chamber, with subsequent defrosting at a temperature of +22°C. The data presented was acquired with an OKO-2 GPR with a center frequency of 1200 MHz on river sand and rock sand of varying humidity (from 3 to 20 %) and with a change in temperature. The results of the research showed a significant difference between the velocity of GPR signals at negative and positive temperatures when combined with a humidity content of more than 7%. The results obtained will serve as a basis for the creation of an automated system for determining variation of humidity in rocks with data displayed through a geographic information system, which will greatly facilitate the control of humidity in rocks in the mining industry. The application of the system developed is promising for the monitoring of rock properties in pit walls and roofs of mine openings, and soil foundations of engineering structures.