›› 2010, Vol. 31 ›› Issue (12): 3934-3938.
• Geotechnical Engineering • Previous Articles Next Articles
GUI Le-le, ZHOU Hong-wei, XIA Chang-jing, DU Sheng-hao, LIU Yan
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Abstract:
Based on the Jinping second stage hydropower station, a distribution diagram of faults, is obtained from the geological diagram at Maomaotan lock site. A power-law relation between fault number and fault size is proposed, i.e. - . Two power exponents are estimated by using linear fitting in two segments. It is found that the power exponent D has a value of 0.48 if fault lengths r are shorter than 0.1 km; while the power exponent is equal to 1.49 if fault lengths r are longer than 0.1 km. Combining with Monte Carlo method, the spatial distribution of a further small scale of joints can be obtained. Finally, the discontinuous deformation analysis (DDA) is employed to numerically simulate and analyze the excavation of the Dashuigou underground powerhouse; and the stress and displacement plots resulted from excavation in highly jointed rock mass are obtained.
Key words: fault size, fault number, power-law relation, discontinuous deformation analysis (DDA)
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GUI Le-le, ZHOU Hong-wei, XIA Chang-jing, DU Sheng-hao, LIU Yan. Generation of fracture net based on scale law and its effect on underground powerhouse stability[J]., 2010, 31(12): 3934-3938.
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