非贯通充填节理岩体单轴压缩力学特性模拟

发布时间：2018-05-02 01:02

本文选题：非贯通充填节理岩体 + 单轴压缩　；参考：《矿业研究与开发》2017年03期

【摘要】：以非贯通充填节理岩体为研究对象,采用数值方法研究了节理充填物弹性模量、节理充填物内摩擦角与粘聚力、节理长度、倾角、列间距、条数及加载速度等8个因素对岩体单轴压缩力学特性的影响。计算结果表明,试件单轴压缩弹性模量及峰值强度随着节理充填物弹性模量的增加有较大幅度提高;而随着节理充填物粘聚力及内摩擦角的增加,则变化很小;试件单轴抗压峰值强度随着节理长度增加,降低幅度较大,而随节理列间距的增加,强度降低幅度较小;节理倾角对试件单轴抗压力学特性也有较大影响;随着节理条数的增加,试件峰值强度先大幅降低,而后逐渐趋于定值。随着加载速度的提高,试件单轴压缩应力应变曲线有较大变化,峰值强度有明显提高。通过对上述因素的对比发现,就节理本身性质而言,节理几何参数对岩体力学特性的影响最大,节理变形参数的影响次之,而节理强度参数的影响最小。
[Abstract]:The elastic modulus of jointed filling, friction angle and cohesion, length of joint, inclination angle, column spacing of jointed backfill are studied by numerical method, taking jointed rock mass as research object. The influence of eight factors, such as bar number and loading speed, on the mechanical properties of rock mass under uniaxial compression. The results show that the elastic modulus and peak strength of the specimen increase greatly with the increase of the elastic modulus of the joint filling, but the change is very small with the increase of the cohesion of the joint filling and the angle of internal friction. The peak strength of uniaxial compression decreases greatly with the increase of joint length, but decreases slightly with the increase of joint spacing, and the angle of joint inclination has a great influence on the uniaxial compressive properties of the specimen. With the increase of the number of joints, the peak strength of the specimen first decreases significantly, and then tends to a constant value. With the increase of loading speed, the stress-strain curve of uniaxial compression is changed greatly, and the peak strength is obviously increased. Through the comparison of the above factors, it is found that the geometric parameters of joints have the greatest influence on the mechanical properties of rock mass, the deformation parameters of joints the second, and the strength parameters of joints the least, as far as the properties of joints themselves are concerned.
【作者单位】：黄淮学院建筑工程学院;中国地质大学(北京)工程技术学院;
【基金】：国家自然科学基金资助项目(41162009)
【分类号】：TU45

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