Authors: S.M. Prostov, N.Yu. Nikulin

Title of the article: GPR monitoring while building soil bases mining works In kuzbass

Year: 2015, Issue: 5, Pages: 11-18

Branch of knowledge: Earth sciences

Index UDK: 550.857 : 624.130

DOI: -

Abstract: Existing methods of GPR do not fully provide the RA-tional modes and the desired information content in the interpretation of GPR data, not adapted to the solution of problems of the location of the weakened zones in natural and techno-genetic arrays and evaluate the quality of their strengthening physico-chemical methods. Objective: rationale and development of the methodical providing of georadiolocation innovative monitoring strengthening of the bases of mining works, ensure to give effect to the increase of informativity locations weakened zones and control processes of strengthening of the array to reduce the costs of conducting mining operations. Research methods: classical methods of electrodynamics and electrorate key laboratory study of physico-mechanical properties of rocks, productive geological survey and geophysical studies, including GPR monitoring, data processing, statistical analysis of databases. Because the depth and resolution sensing, nonlinear dependent electrical resistivity ρ and the relative dielectric constant ε, decrease with increasing frequency, as the criterion of the efficiency of the mode of GPR, it is advisable to use a function F that takes into account both these factors. The probing frequency corresponding to the extremum of the function F, the nonlinear depends on the ratio ρ/ε. The selection of the center frequency of the antenna unit of geolocator in the range of 80-240 MHz using the cyclic algorithm provides a more informative monitoring up to 30 %. Improving the accuracy of GPR monitoring strengthen the foundations of structures is achieved by building an integrated GPR data, similar to the geoelectric sections, using an algorithm that includes the partitioning field on the elements of a predetermined size and the summation of the measured signals within these elements, as well as a complex algorithm that includes zonal frequency filtering, determination of true depth sensing, formation pogrebennih sections, vertical and horizontal geoelectric sections and three-dimensional models of the weakened zones on the basis of geological andgeophysical monitoring. Examples of monitoring of technogenic grounds aboveground structures, railroad tracks, galleries enrichment plant, tunnel deep under the surface it is established that the main causes of the formation of the weakened zones are unzip on bulk soils and their local blagoveshenie. These zones are diagnosed on the GPR data using the following techniques: fixation of additional zones of penetration of the injection solution as electrically contrasting environments; the structure of slices and slice geoelectric sections by combining with outcomes inversion of VES and static data; constructing a three-dimensional mo-delay across multiple slices. The information obtained is the effective addition of traditional geological and geophysical monitoring, the necessary volume of drilling can be reduced by 10-15 %. At a substantiation of optimum modes of strengthening we

Key words: GPR consolidation of soils electromagnetic properties pressure injection electrochemical fixation

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