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中文摘要：
为了更全面的评价岩体质量，克服传统的岩体质量等级分级方法如RQD，RMR和BQ等未考虑岩体中的节理、裂隙的不足，根据岩体结构面的自相似特征，应用分形理论来对其进行研究．运用盒计维数法对某地下工程岩体结构面分布的分形维数进行计算，验证了岩体结构面分布的分形特征．对计算结果数值分布的规律分析发现，分形维数越大，岩体质量越差，表明岩体结构面分布的分形维可以作为评价岩体质量的指标．并通过分维数D与RQD，RMR和BQ的拟合，给出岩体质量分级指标D值，从而提出一个以岩体结构面分形维数为分级指标的岩体质量评价方案．
英文摘要：
In order to evaluate the quality of rock mass more comprehensively, and overcome the deficiency of the traditional rock mass quality rating classification methods such as RQD, RMR, and BQ which have not considered rock joints, fracture, owing to the property of self- similarity of rock mass discontinuity, it can be addressed with fractal theory. The current study has testified the fractal characteristics of rock mass gliscontinuity distributions based on the calculation of the fractal dimensions of discontinuity distributions in the roadway surrounding rock masses at an underground project with the application of the box - dimension method. By analyzing the fractal dimension values, the investigation shows that the higher the value is, the lower the rock mass quality, and it is shown that taking the fractal dimension of rock mass discontinuity distribution as the index of rock mass quality rating is feasible. With fitting of the fractal dimension D and RQD, RMR and BQ, rock mass quality classification D value is given, a scheme of rock mass quality classification, which the fractal dimension D is taken as the classifying target value, is proposed.
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