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导言在许多类型的岩层中(比如粘土质的沉积岩、岩盐以及其他较软弱的岩质等)地下洞室在开挖完成之后,其围岩的变形特性,强度特性以及整体的稳定性有明显的时间效应.因此,近年来在国内外的研究工作中已有不少人致力于时间因素对围岩稳定性影响的研究.对于单一岩洞已有不少作者用弹塑性,弹粘性等模型对园形洞室的一维及二维问题提供了一些理论解答〔1〕〔2〕〔3〕〔4〕〔5〕〔7〕〔10〕〔11〕〔12〕〔13〕〔14〕〔16〕.当然这些用解析法给出的结果,一般都必须先假定岩层为均一,各向同性的介质.近十年
Introduction In many types of rock formations (eg, clayey sedimentary rocks, rock salt, and other weaker rocks, etc.), the excavation of underground caverns has obvious deformation properties, strength characteristics, and overall stability of the surrounding rock. Time effect. Therefore, in recent years, many people in domestic and foreign research work have devoted themselves to the study of the influence of time factors on the stability of surrounding rock. For a single cavern, many authors have used elasto-plastic and elastic viscous models for the The one-dimensional and two-dimensional problems of the caverns provide some theoretical solutions [1][2][3][4][5][7][10][11][12][13][14][16 Of course, these results given by the analytical method must generally assume that the rock formation is a homogeneous, isotropic medium.