Vliv svorníkové výztuže na deformační chování okolního horninového masivu

Abstract

Doctoral Dissertation Thesis deals with the bolt reinforcement and its optimal application in coal mines in the eastern part of the Karvina subbasin (Upper Silesian Basin). This work follows with its focus on project of the Institute clean technology of mining and use of energy resources reg. No. ED2.1.00/03.0082 (CZ.1.05/2.1.00/03.0082) supported by the Operational Programme Research and Development for Innovation, funded by EU Structural Funds and the czech republic state budget, with its support was created. This work is divided into three main units. For introduction into problems is in the first chapter briefly described genesis of the use bolt reinforcement, approach to its design and not least monitoring mining works (gateroads), in order to monitor and control of project provided data under geological conditions in the Czech part of Upper Silesian Coal Basin. With regard to the location of the analyzed area in the eastern part of of the Karvina subbasin are described in more detail geological and structural-tectonic conditions in the Karviná subbasin. The key chapters contains the second part. It is dedicated mainly utilization of mathematical modeling of the stress and strain state in the vicinity of the mine workings (gateroads) by FEM and inverse analysis carried out on processed geomechanical models, on sites in the eastern part of the Karvina subbasin. It describes the methodology of geomechanical and mathematical models for the subsequent inverse analysis by using of the measured data. Consideration was given to work with inverse models, which were partially modified by deformation and strength properties of massif parts so that the final model behavior was in accordance with the results of measurements and observations. They are discussed here possibilities of expression the effects of bolt reinforcement by using modified strength and deformation parameters as well as the possibility to quantify the impact of bolt reinforcement on the rock mass on the one hand and refinement of subsequent solving of long gateroads stability both in terms of design reinforcement, as well as the expected signs of deformation, on the other. This discussion is not only supported by a number of thematic maps processed, geomechanical sections, assembled primary documentation of executed deformation measurements, as well as confrontation with the results of mathematical and inverse models. The concluding chapter summarizes the results of inverse analysis, based on a representative set of models, by using data of deformation expressions, measured in gateroads reinforced with rock bolts in the Karvina subbasin, specifically on the CSM Mine. Due to the long-term extraction, when the current technical and economical conditions expected twenty-year exploitation of coal, is also in this chapter given attention to the possibilities of modeling of other cases of bolt reinforcement applications in perspective locations Karviná subbasin and also with a view to ensuring a higher degree of safety and effectiveness during future mining operation in the OKD (Ostrava-Karvina Mining District).