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Browsing by Subject "fracture system"

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    Item type:Article, Access status: Open Access ,
    Badania zasięgu i intensywności strefy spękań wokół chodnikowych wyrobisk korytarzowych
    (Wydawnictwa AGH, 2009) Kabiesz, Józef; Patyńska, Renata
    In the Carboniferous stratified rock mass there occur discontinuity systems coupled to its lithologic structure and the structural features of rocks. The formation of an opening causes the cracks to part, which frequently leads to the essential degradation of the rock mass strength parameters around the opening. Changes in the rock mass properties around the excavation can be of the highest importance to the selection of its proper support, as well to the assessment of maintenance requirements, hazards occurring in its vicinity, rock mass imperviousness, etc. The problem of the fracture distribution around excavations has been confined to the characteristic of natural fractures. The rock fracture distribution has been investigated and assessed based on the in situ performed studies of endoscopic bore-holes and on the aerometric measurements. From the obtained results of the analysis and the existing rock mass classifications, the fracture characteristics of the surroundings of the excavations under study are presented and, for example, the rock mass imperviousness classification needed for their use in the formation of underground storage facilities to store gases and liquids is given.