裂隙岩体三维渗透张量及表征单元体积的确定

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Abstract Both numerical methods and single-hole packer tests are used in study of the representative elementary volume(REV) and three-dimensional(3D) permeability tensor for fractured rock masses. Based on the probability distribution functions and corresponding statistical parameters investigated in field，3D stochastic discrete fracture networks are randomly generated using the Monte Carlo method. The composite element method(CEM) is used to obtain the permeability tensor and REV of rock masses，with a large quantity of calculations concerning different sample sizes in various directions. The permeability tensor is then modified and improved by using single-hole packer test results. Finally, the proposed method is used in determining the permeability properties of dam foundation of Xiaowan hydropower station. The results show that the proposed method is feasible and reliable.

Key words： rock mechanics three-dimensional permeability tensor representative elementary volume(REV) stochastic fracture network Monte Carlo method composite element method；single-hole packer test

Received: 22 March 2013

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http://www.rockmech.org/EN/Y2014/V33/I2/309

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