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中文摘要：
简述模糊综合评判的表达原理，首先，研究岩体分级评定隶属函数的两种形式，对于那些在数学上是连续的指标，指出隶属函数可以采用正态、三角模糊数及正弦函数等连续函数：对于难于采用连续函数刻画的指标，可以采用隶属度取值表；然后，分析影响岩体稳定的因素，选取其中5个指标作为分类依据，建立各个指标的隶属函数，引入二元相对比较法确定各因素的相对优先权重，并说明在岩体稳定性分级中的应用办法；最后，介绍一地下岩体工程的工程地质情况，利用所研究的分类方法对该工程实例进行分析，并给出主要的过程利结果，分析结果在工程施工中得到验证，从而说明研究结论的可靠性和适用性。
英文摘要：
Duality element relative fuzzy evaluation method was briefly introduced. The two forms of membership function that express membership degree of basic element of rock mass were researched at first. For some indices, which are continuous in math, their membership functions can be expressed through continuous functions, such as normal function, triangle fuzzy number and sine-wave function and so on. Degree of membership of discrete indices can be got through table of membership degree. Elements that effect rock-mass stability are analyzed. Five indices of these elements were picked out as the foundations of rock mass stability classification, and membership function of each index of the five above-mentioned indices was established. Duality element relative comparison method was adopted to assure relative weight between two elements. It was introduced how to use duality element relative comparison method when it was adopted in rock mass stability classification. The engineering geology of an underground rock mass engineering was introduced at last. Stability grade of surrounding rock of the underground engineering was analyzed by using the classification method. The primary analysis progress and results were introduced and the analytical results were validated during construction of engineering. The analytical results show the classification approach of the rock-mass stability researched by the authors is reliable and practical.
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