煤矿安全2019，Vol.50Issue(11)：54-57,4.DOI:10.13347/j.cnki.mkaq.2019.11.012
不同裂隙角度岩石相似试样力学特性及声发射特性研究
Study on Mechanical Properties and Acoustic Emission Characteristics of Similar Specimens of Rocks with Different Fracture Angles
摘要
Abstract
In order to study the variation of mechanical properties of rock-like materials under the influence of prefabricated cracks with different dip angles, rock-like samples were made from river sand, cement, gypsum and other materials, and cracks of different angles were made for the similar rock samples. Uniaxial compression experiments were carried out on samples with differ-ent inclination angles to study the variation of mechanical properties. The peak intensity of the specimen with pre-formed cracks increases logarithmically with the the increase dip angle of the fracture. At the same time, the peak strain increases exponentially with the increase dip angle of the fracture. The cumulative count of AE event and the energy intensity of the pre-formed fracture specimens are similar. It is divided into three stages: the compaction initiation stage, the elastic stablity growth stage, and the de-struction of the sharp growth stage. And the cumulative count of AE event increases with the increase of the inclination angle, and the energy intensity also increases with the increase of the inclination angle.关键词
预制裂隙/单轴压缩/峰值强度/峰值应变/物理相似模拟Key words
prefabricated crack/ uniaxial compression/ peak strength/ peak strain/ physical similarity simulation分类
矿业与冶金引用本文复制引用
索永录,屈慧升..不同裂隙角度岩石相似试样力学特性及声发射特性研究[J].煤矿安全,2019,50(11):54-57,4.基金项目
国家自然科学基金资助项目(51474173,51774229) （51474173,51774229）
