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Open AccessArticle

Mechanical Tests and Numerical Simulations for Mining Seafloor Massive Sulfides

by 1,2,*, 1,2, 1,2, 1,2, 3 and 3
1
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
2
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
3
Hunan Institute of Engineering, Xiangtan 411104, China
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(8), 252; https://doi.org/10.3390/jmse7080252
Received: 26 June 2019 / Revised: 18 July 2019 / Accepted: 29 July 2019 / Published: 1 August 2019
(This article belongs to the Special Issue Marine Mineral Resource Mining)
With the decrease of primary resources in recent years, deep seabed mineral resources, especially the massive sulfides, are of extensive research significance. In this paper, firstly, the uniaxial compressive strength (UCS) test and triaxial compressive strength (TCS) test on the seafloor massive sulfides (SMS) samples from three different segments are conducted to obtain the key mechanical properties, including the cohesive force, internal friction angle, compressive strength, elastic modulus and Poisson’s ratio. Then, by leveraging the PFC3D code, the uniaxial and triaxial numerical simulations of SMS are performed. During this process, the micro properties in the simulation are altered through a calibration process until they match the macro properties of the SMS samples measured in the laboratory tests. Finally, the micro properties are applied to simulate the cutting process of single cutting pick and two adjacent cutting picks; meanwhile, the cutting force in the fragmentation process of SMS is monitored and collected. This research can provide some guidance for the mining simulation of SMS and effectively predicting the maximum force on the cutting pick. View Full-Text
Keywords: seafloor massive sulfides (SMS); uniaxial compressive strength (UCS); triaxial compressive strength (TCS); cutting force; PFC3D seafloor massive sulfides (SMS); uniaxial compressive strength (UCS); triaxial compressive strength (TCS); cutting force; PFC3D
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Dai, Y.; Ma, F.; Zhu, X.; Liu, H.; Huang, Z.; Xie, Y. Mechanical Tests and Numerical Simulations for Mining Seafloor Massive Sulfides. J. Mar. Sci. Eng. 2019, 7, 252.

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