论文部分内容阅读
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。
In order to solve the risk problem of index weights in the stability analysis of underground engineering surrounding rock, an improved extension method of stability analysis of surrounding rock stability is proposed. By extracting the expectation of the surrounding rock of underground engineering and the characteristics of extreme value of the risk index, a risk analysis mode of surrounding rock stability is established, and the physical and risk regions of the surrounding rock stability of underground engineering are established to determine the membership of risk characteristics. Formally describe the stability analysis of the surrounding rock of underground engineering by using the physical element description of data, and improve the extension method by data envelopment analysis to establish the relative risk evaluation model for supporting the stability of surrounding rock in underground engineering. The model is applied to the case of stability of surrounding rock under earthquake. The result is correct and reliable, which shows that the method is reasonable and feasible and has certain universal applicability.