Využití popílku a popílkových suspenzí při uzavírání dolů a při výstavbě hrazových objektů

Abstract

The submitted thesis discusses the use of fly ash as a waste material suitable for disposal of the main mine workings. Especialy in liquidation of hole reinforsced shaft braced by attle and contruction of perineal objects. The work is mainly aimed at assesing the existing methods of smoothing the effects of mining activities, focusting on the destructions main mine workings and requirements from it. The purpouses of this work is to recipes of packs mixtures for liquidation holes, with the intention that the proposed additive positively influence mainly sealing effects, which would favourably affect the waterthightness and gasthightness of liquidated work. At the same time the work deals with evaluation of mixtures used in mines and in contruction of underground construction, as a suitable alternativ for the contruction perineal objects. The results of this work is a comprehensive summary of existing technologies and materials use in the liquidation of major mining works and the construction of perineal objects in Ostrava - Karvina basin. AIso adresses the results and evaluation of newly proposed sealing mixtures based on concret~ with addition ofbentonite and fly ash-based ,binders with bentonite aditives and evaluace the results of laboratory measurements and measurements "in situ", selected mixtures suitable for contruction of blow-up resistive containment dikes.