钻孔岩体裂隙几何参数确定方法研究及其应用

doi:10.13722/j.cnki.jrme.2014.1618

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摘要裂隙岩体渗透性是高放废物处置库场址选择和评价的重要考虑因素。钻孔岩体渗透性特征主要依靠钻孔电视获得的裂隙几何参数来确定。针对传统统计法确定裂隙几何参数存在的不足和误差，提出了新的统计方法和计算公式。研究认为：(1) 由于岩体裂隙空间分布多变性，提出了以裂隙密度和产状为基础的岩体均质区划分方法；(2) 钻孔岩体裂隙发育优势产状采用聚类分析方法来统计；(3) 裂隙间距的确定考虑了测量误差的影响并提出了修正公式；(4) 裂隙有效水力隙宽提出按照力学成因来确定。将获得的裂隙几何参数代入渗透张量计算程序中，得到钻孔岩体的渗透张量以及渗透主值和主渗透方向，从而为钻孔岩体渗透性分析提供依据。

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关键词 ：裂隙, 几何参数, 统计方法, 渗透张量

Abstract：Aperture rock mass permeability plays an important role in site selection and evaluation of high-level radioactive waste repository. The characteristics and magnitude of the drilling borehole rock mass permeability are characterized by the aperture geometry parameters which are obtained by Borehole Television. With regard to the defects and error of the traditional statistical method to determine aperture geometry parameters，this paper proposes a new statistical method. According to spatial variability of the rock aperture，a homogeneous area partition is proposed based on the aperture density and occurrence. The preponderant group of the aperture development is determined by clustering analysis method. In consideration of the influence of measurement error in determination of the aperture interval，a correction formula is proposed in this paper. The effective hydraulic opening of aperture is determined by the mechanics causes. When the aperture geometry parameters are put into the permeability tensor calculation program，the drilling rock mass permeability tensor，permeability principal value，and the main seepage direction could be obtained. The results can provide a basis for drilling rock mass permeability analysis.

Key words： aperture geometry parameter statistical approach permeability tensor

引用本文:

魏翔1，杨春和1，2. 钻孔岩体裂隙几何参数确定方法研究及其应用[J]. 岩石力学与工程学报, 2015, 34(09): 15-15.
WEI Xiang1，YANG Chunhe1，2. RESEARCH AND APPLICATION OF A GEOMETRIC PARAMETER DETERMINATION METHOD FOR DRILLING ROCK APERTURE. , 2015, 34(09): 15-15.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.1618 或 http://www.rockmech.org/CN/Y2015/V34/I09/15

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