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论述了裂隙岩体中的结构面的产状、分布、密度和结构面的内摩擦角的统计模型，提出了多组结构面同时存在的分组结构面间距统计法则，阐述了结构面的产状、边线长度等几何参数和内摩擦角的模拟模型，引用块体理论和Ｂａｙｅｓ推测公式建立了巷道围岩中的“危石”预测模型。
The statistical model of the occurrence, distribution, density and internal friction angle of the structural plane in the fractured rock mass is discussed. The statistic rules of the inter-plane spacing of the grouped structural planes are proposed, and the occurrence of the structural plane , Edge length and other geometrical parameters and internal friction angle of the simulation model, the block theory and Bayes inference formula is used to establish the “dangerous rock” prediction model in the surrounding rock of the roadway.