基于改进可拓方法的地下工程围岩稳定性风险分析

为解决地下工程围岩稳定性分析中指标权值存在的风险难题,提出了一种地下工程围岩稳定性风险分析的改进可拓方法。通过提取地下工程围岩风险期望与风险指标极值变化特征,建立了围岩稳定性风险分析工作模式,构建地下工程围岩稳定性风险事件物元、风险域,确定风险特征隶属度,建立了地下工程围岩稳定性风险分析的形式化物元描述,以数据包络分析改进可拓方法,建立支持地下工程围岩稳定性相对风险评价模型。模型应用于地震作用下围岩稳定性风险案例,结果正确可靠,表明方法合理、可行,具有一定的普遍应用性。

Risk Analysis on Surrounding Rock Stability of Underground Engineering with Improved Extension Method

To resolve the risk problem of index weight in stability analysis,an improved extension method was put forward into the risk analysis on surrounding rock structure in underground engineering.Through Abstracting the risk expectation and the changing characteristics in the risk index extremum,a workflow mode was set up for the risk analysis of surrounding rock stability in underground engineering,and then,the risk matter-element,risk domain,and membership degree function was set down,which formally described ...