Experimental study of mechanical properties of seafloor massive sulfide

被引：2
作者：
Liu S. [1 ,2 ,3 ]
Hu J. [1 ,2 ,3 ]
Dai Y. [1 ,2 ,3 ]
Hu Q. [1 ,2 ,3 ]
机构：
[1] College of Mechanical and Electrical Engineering, Central South University, Changsha
[2] State Key Laboratory of Deep Sea Mineral Resources Development and Utilization Technology, Changsha
[3] Shenzhen Research Institute, Central South University, Shenzhen
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2017年 / 48卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Compressive strength; Criterion of strength; Fracture; Modulus of elasticity; Seafloor massive sulfide;
D O I：
10.11817/j.issn.1672-7207.2017.07.009
中图分类号：
学科分类号：
摘要：
Mechanical properties of deep-sea multi metal sulfide was selected as research object, the specimens were tested under different confining pressures, and stress-strain curves of seafloor massive sulfide and test data were used to analyze ore crushing process, failure characteristics, strength criterion, elastic modulus, tear strength and compressive strength. The results show that the crushing process of deep-sea poly-metallic sulfide ore is similar to general rock breaking process which can be divided into OA, AB, BC, CD and DE stage, while the OA stage is often not obvious which indicates that the porosity of ore is relatively small. There are three kinds of damaging forms of poly-metallic sulfide, such as transverse failure overall, shear failure and total failure, and failure form and confining pressure are closely related. Mohr-Coulomb criterion is more suitable for judging the broken poly-metallic sulfide. With the increase of confining pressure, the elastic modulus is gradually decreased. The relationship between stress and compressive strength and confining pressure is closely related. © 2017, Central South University Press. All right reserved.
引用
收藏
页码：1750 / 1755
页数：5
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