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由于岩体赋存条件的复杂性以及地质勘探工作量和实验工作量的限制，地质勘探取样存在随机性．实验工作中也不可避免的会产生误差，从而产生随机误差．岩石工程中对岩石的分类、岩体的分类以及对样本的分组也是人为划分，从而岩石样本也存在模糊性．传统的统计方法不适应处理模糊性，因此，建立一种既考虑岩石力学参数和岩体力学参数的随机性又考虑它们的模糊性的随机—模糊统计分析模型．
Due to the complexity of rock mass exposition and the limitation of geological exploration workload and experimental workload, there is randomness in geological exploration sampling. Experimental work will inevitably produce errors, resulting in random errors. Rock engineering classification of rocks, rock mass classification and the grouping of samples is also artificially divided, so rock samples also have ambiguities. Traditional statistical methods are not suitable for dealing with fuzziness. Therefore, a stochastic-fuzzy statistical analysis model considering both the randomness of rock mechanics parameters and rock mechanics parameters and their fuzziness is established.