Research on Confining Pressure Effect on Mesoscopic Damage of Rock Salt Based on CT Scanning

被引：5
|
作者：
Wang, Lu [1 ]
Liu, Jianfeng [2 ]
Xu, Huining [2 ]
Xu, Yangmengdi [2 ]
机构：
[1] Xihua Univ, Sch Civil Engn Architecture & Environm, Chengdu, Sichuan, Peoples R China
[2] Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu, Sichuan, Peoples R China
来源：
PROCEEDINGS OF GEOSHANGHAI 2018 INTERNATIONAL CONFERENCE: ROCK MECHANICS AND ROCK ENGINEERING | 2018年
基金：
中国国家自然科学基金;
关键词：
Rock salt; CT scanning; Microscopic damage; Confining pressure effect; QUANTIFICATION; PERMEABILITY;
D O I：
10.1007/978-981-13-0113-1_28
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The Rock salt is the optimal surrounding rock of underground energy storage, so its damage is directly related to the impermeability and stability of the storage. In this study, CT scanning technique was used to analyze the microscopic damage characteristics of rock salt, which damaged under the three-dimensional stress state. The distribution and evolution characteristics of porosity, crack area, crack volume and crack quantity of damaged rock salt under different confining pressures were obtained. The results revealed the confining pressure effect of the mesoscopic damage of rock salt. With the increase of confining pressure, the quantity and size of cracks in rock salt gradually decreased. The confining pressure of 10 MPa is the turning point where the porosity decreased from fast to slow and the failure characteristics of rock salt changed from the apparent shear failure surface to the surface micro cracks.
引用
收藏
页码：254 / 262
页数：9
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