Title: Research on the impact of control discontinuities on underground caverns
Abstract: The arrangement and structural form of underground caverns are determined by the distribution and engineering characteristics of control discontinuities.Taking the underground caverns of the Nuozhadu hydroelectric station in Yunnan as an example,this paper studies the impact of control discontinuities on underground caverns.Based on the analysis of geological conditions and rock mass structures.The paper also studies the control of Grade I discontinuities over caverns layout and the impact of Grade I-2 discontinuities on the stress and deformation of wall rocks by 3D-FLAC.The study result indicates that when the distance between Grade I fault and the nearest side wall is less than 80 m,the stress in wall rocks increases rapidly,and the deformation quantity also increases when the distance is less than 60 m and that the stress in wall rocks is affected by low-angle faults whose strike lines intersect with cavern axial line by a small angle,and the deformation of wall rocks is affected by the medium dip angle discontinuities.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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