| УДК 550.8.05 | DOI: 10.21440/0536-1028-2020-7-49-55 | Download |
Introduction. Geophysical methods of rock mass research are among the most effective ways of solving various mining problems being widely used in mining, gas and oil industry, as well as in science. They allow to conduct prospecting and prospect evaluation remotely, to reveal structural heterogeneity, cavities, zones of contacts of various environments in the rock mass with rather high precision. The article contains an example of solution to the problem of finding a fallen and spread through three-tier shelf in an operated shaft.
Research methodology. Spectral seismic profile (SSP) method and GPR were used for prospecting. SSP is based on the dependence between the spectral composition of the oscillatory process occurring when rock mass exposed surface undergoes impact effect, and the structure of the rock mass. GPR method is based on the reflection of the electromagnetic wave from boundaries between media with different electrophysical properties.
Research results. Geophysical methods have made it possible to identify the following boundaries of the metal shelf filled with rock mass inside the vertical shaft: 5.5–6.0 m, 10.5–11.0 m, 15 m. Combined results of the two measurement methods and their comparative analysis show rather high convergence therefore confirming the reliability of the obtained results. Exploration drilling of downholes from the level working confirmed the obtained results.
Key words: GPR; geophysical research; rock cork; shaft; rock mass; spectral seismic profile.
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Received 29 September 2019
