摘要
围岩稳定性评价是确保工程安全的一个关键性环节,由于受到岩体内部结构和外部环境等多种因素的综合作用,围岩稳定性不仅具有随机性,而且具有模糊性的特点。以工程模糊集理论为基础,建立以相对差异函数为基础的模糊可变集合工程方法,并考虑模型参数指标权向量的可变性,对围岩稳定性进行评价,以体现该方法的特点与优点,增加评价结果的可靠性。通过实例,详细列出该方法的计算步骤,并将结果与其他方法进行比较,验证该方法的合理性与优越性。
Assessment of surrounding rock stability is a key link to ensure the safety of engineering. Because of multifactor synthetic effect of rock mass internal structure and external environment, surrounding rock stability has not only randomicity but also fuzzy characteristic. Based on engineering fuzzy set theory（this theory has been founded by author--Chen Shouyu in 1990s）, engineering method of variable fuzzy set is proposed. The base of the theory of variable fuzzy set is the relative different function： and variable characteristic of model parameter（index weight vector） is considered to assess the surrounding rock stability. It shows particularity and excellence of variable fuzzy set. The evaluation results are more reliable. The detailed calculational process of this method is proposed too. Offering a application and comparing the result with other methods, rationality and advantage of engineering method of variable fuzzy set has been verified. This method can well reflect every evaluating factor＇s influence on surrounding rock stability too. It can be used not only in assessment of surrounding rock stability but also in other engineering fields. This method is simple, so it is convenient for engineers and technicians to use in microcomputer.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第9期1857-1861,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
围岩稳定性
模糊可变集合
相对差异函数
级别特征值
rock mechanics
surrounding rock stability
variable fuzzy set
relative different function
rank feature value
