Podklady pro regionální prognózu důlních otřesů v oblasti 11. kry na závodě ČSA Závodu Důl Karviná

Abstract

This bachelor thesis deals with regional prognosis of the rock burst in the area of 11th floe at the Karvina coal mine, locality ČSA. According to long-term concept of mining activities Karvina Mine, locality ČSA is considered in the 11th floe with the extraction of seams no. 29, no. 31 and no. 34. Evaluation of the aforementioned regional prognosis has been done according to guideline of regional prognosis. It is based on the results of reduced unconfined compressive strength σDred [MPa], gradient strength´s angle αp [°], the depth H [m], thickness of the coal seam ws [m], tectonic fracturing of seam and stress-strain characteristics of coal seams and lithological buildings nearby seam. The authors used descriptions of geological exploration boreholes K - 3/90 , K - 46/12 , K - 48/13 , K - 51/13 , K - 52/14 , K - 53/14 , K - and K 56/14 - 58/14 . The results of this thesis can be used as a basis for further evaluation of regional prognosis in the 11th floe of Karviná coal mine, locality ČSA.