Measures of Stability for Roofs over Cavities in Rock
Measures of Stability for Roofs over Cavities in Rock
复制标题
岩石空洞顶板的稳定性措施
DOI：
10.1061/9780784484029.062
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Park, Dowon
中科院分区：
文献类型：
--
作者：
Michalowski, Radoslaw L.;Park, Dowon
岩层中的工程空腔通常是地下交通基础设施的一部分。讨论了此类空腔顶板稳定性的三种测量方法：稳定数、安全系数以及防止软弱岩石中空腔顶板破坏所需的支撑压力。稳定性数是当顶板即将破裂时岩石特性和空腔尺寸的无量纲组合。虽然在将稳定性数和安全系数应用于土结构方面存在丰富的经验，但将它们用于定义岩石结构的安全性是复杂的。这是因为岩石的强度包络线是平均应力的非线性函数。分析中使用的具体函数是 Hoek-Brown 失效准则。使用极限分析的运动学方法，结果以图表形式呈现。所有稳定性指标都强烈依赖于地质强度指数，并且在较小程度上依赖于 Hoek-Brown 失效准则中的其他参数。
Engineered cavities in rock formations are often part of an underground transportation infrastructure. Three measures of roof stability in such cavities are discussed: the stability number, the factor of safety, and the support pressure needed to prevent cavity roof failure in weak rock. The stability number is a dimensionless combination of the rock properties and the size of the cavity when roof failure becomes imminent. While there exists substantial experience in application of the stability number and the factor of safety to soil structures, their use to define the safety of rock structures is intricate. This is because the strength envelope for rocks is a non-linear function of the mean stress. The specific function used in the analysis is the Hoek-Brown failure criterion. The kinematic approach of limit analysis is used, and the results are presented in charts. All measures of stability are strongly dependent on the Geological Strength Index, and, to a lesser degree, on other parameters in the Hoek-Brown failure criterion.
DOI：
10.1016/j.ijrmms.2020.104275
发表时间：
2020-04-01
影响因子：
7.2
作者：
Park, Dowon;Michalowski, Radoslaw L.
通讯作者：
Michalowski, Radoslaw L.
DOI：
10.1016/j.ijrmms.2020.104522
发表时间：
2021-01-18
影响因子：
7.2
作者：
Park, Dowon;Michalowski, Radoslaw L.
通讯作者：
Michalowski, Radoslaw L.
DOI：
10.1016/j.ijrmms.2019.104139
发表时间：
2019-12-01
影响因子：
7.2
作者：
Park, Dowon;Michalowski, Radoslaw L.
通讯作者：
Michalowski, Radoslaw L.