作　　者： ; ; ;

机构地区： 中南大学资源与安全工程学院

出　　处： 《岩石力学与工程学报》 2014年第4期772-777,共6页

摘　　要： 考虑不同高径比及充填节理特征等对岩石强度变形特性等的影响,在实验室中进行相似材料的模型试验研究。分别对完整试件,"十"节理试件和"井"节理试件进行单轴压缩和剪切试验,得到如下结论:(1)在压缩和剪切试验中,3组试件都表现出X状共轭斜面和单斜面剪切破坏,其破坏迹线总趋势相似;(2)完整试件受尺寸效应影响明显,节理试件受结构弱化影响显著,并且受充填物影响,节理密度与强度之间的比例关系不突出;(3)在2种节理试件中,弹性模量E和黏聚力c无明显变化,但内摩擦角受充填节理的影响较明显。 The model tests using the rock similar materials were carried out to study the effect of height-diameter ratios and characteristics of the filled joints. The uniaxial compression and shear tests were performed with three types of specimens including ones without joints, ones with cruciform joints and ones with intersecting parallels joints. The failure modes of the three types of specimens are similar in general trends with X-shaped conjugated plane or single plane of shear failure under compression and shear tests. Under the uniaxial compression, the performance of intact specimen is clearly affected by its size, and the strength of jointed one is significantly affected by the weakening of the structure depending on the joint density and the filling materials. The elastic modulus E and the cohesion c have no significant difference for the two kinds of jointed specimens, while the internal friction angles are obviously affected by the joints and their fillings.

关 键 词： 岩石力学 试验研究 贯通节理 石膏充填物 相似材料

领　　域： [建筑科学] [建筑科学]