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BACK ANALYSIS OF COEFFICIENT TENSOR OF PERMEABILITY FOR FRACTURED ROCK MASS
裂隙岩体渗透系数张量的反演分析

Keywords: fractured rock mass,coefficient tensor of permeability,reverse problem of seepage flow,back analysis,optimization,procedure of nodal virtual flux
裂隙岩体,渗透系数张量,渗流反问题,优化,结点虚流量法

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Abstract:

The fractured rock masses are considered as non homogeneous and anisotropic permeable media. The optimal fitting for calculated and measured water level and seepage discharge of measuring points is made. The reverse problem to identify the coefficient tensors of permeability of the rock masses is transformed into an equivalent mathematical minimizing problem. To improve the convergence of iterative calculation, an effective term for penalty is added to the expression of the minimum optimization function. Hereby, the solution to three dimensional complicated reverse problems can directly be obtained on computer. Finally, the solution of a complicated practical example is presented in detail.

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