Three-dimensional stress path in deep-sea sediment under the driving load of a nodule collector

Zhang, Ning; Ma, Ning; Yin, Shiyang; Chen, Xuguang; Zhao, Ming

doi:10.1016/j.oceaneng.2022.111312

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…Xu et al [63] proved the compression-shear-coupled constitutive model of mining vehicle travel time and carried out experimental analysis. Zhang et al [64] researched the vertical stress fluctuations and temporal distribution patterns of seabed sediments caused by the movement of DSMV on the ocean floor.…”

Section: Track and Sediment Model Constructionmentioning

confidence: 99%

A Review on Underwater Collection and Transportation Equipment of Polymetallic Nodules in Deep-Sea Mining

Zhang,

Zuo,

Wei

et al. 2024

JMSE

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In response to the anticipated scarcity of terrestrial land resources in the coming years, the acquisition of marine mineral resources is imperative. This paper mainly summarizes the development of underwater collection and transportation equipment of polymetallic nodules in deep-sea mining. Firstly, the collection equipment is reviewed. The deep-sea mining vehicle (DSMV), as the key equipment of the collection equipment, mainly includes the collecting device and the walking device. The micro and macro properties of sediments have a great influence on the collection efficiency of mining vehicles. For the collecting device, the optimization of the jet head structure and the solid–liquid two-phase flow transport of the hose are discussed. The structure of the walking device restricts mining efficiency. The optimization of the geometric structure is studied, and the geometric passability and lightweight design of the walking device are discussed. Secondly, the core of transportation equipment is the lifting device composed of a riser and lifting pump. In order to explore the key factors affecting mineral transport, the lifting device is summarized, and the design optimization of the lifting pump and the factors affecting the stability of the riser are discussed. Then, the relationship between each device is discussed, and the overall coupling of the device is summarized. Finally, the existing problems and future research focus are summarized.

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Section: Track and Sediment Model Constructionmentioning

confidence: 99%

A Review on Underwater Collection and Transportation Equipment of Polymetallic Nodules in Deep-Sea Mining

Zhang,

Zuo,

Wei

et al. 2024

JMSE

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“…Among them, polymetallic nodules have sizable reserves and are considered to be the most commercially promising resources [1][2][3]. At present, the deep-sea mining system is mainly composed of four parts: the surface mining vessel, the pump pipe conveying system, the subsea mining vehicle, and the system collaborative control simulation platform, which cooperate to lift polymetallic nodules with a depth of 5,000-6,000 meters to the surface [4][5][6][7]. Due to the complexity of the depositional environment, material source, and consolidation state, the mechanical properties of deepsea sediments are quite diferent from those of onshore soft clay, which are characterized by low strength, high compressibility, and low permeability [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Pressure‐Sinkage Model for Deep‐Sea Sediments Based on Variable‐Order Fractional Derivatives

Wei

Cao

Xia

2023

Mathematical Problems in Engineering

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In order to better describe the pressure-sinkage process of deep-sea surface sediments, this article proposes a new four-element model. First, the pressure-sinkage process was divided into four components according to the change in the deep-sea sediment sinkage rate, and the time-dependent mechanical property of deep-sea sediments was described. Then, a new four-element pressure-sinkage model was established by introducing variable-order fractional derivatives into the modelling idea of classic element combination to describe the full pressure-sinkage regions of deep-sea sediments. Furthermore, by comparing with the experimental results from other literature, the proposed model was verified to predict the pressure-sinkage process of deep-sea sediments under static and dynamic loads. Finally, through a sensitivity analysis of model parameters, the effects of ground pressure and time on the law and mechanism of deep-sea sediment pressure sinkage were revealed. Results indicate that the deep-sea sediment pressure-sinkage process has obvious nonlinear characteristics and that the sinkage depth increases directly with ground-specific pressure and time. Through comparative analysis of both experimental and predicted results, the proposed pressure-sinkage constitutive model can describe the stress-strain of the full stages. Thus, the variable order model represents an effective method to predict the pressure-sinkage process of deep-sea sediments.

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A block failure model for deep-sea sediment between grousers of deep-sea mining vehicles based on elasto-plastic theory

Liu,

Chen,

Wang

et al. 2024

Applied Ocean Research

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Three-dimensional stress path in deep-sea sediment under the driving load of a nodule collector

Cited by 5 publications

References 10 publications

A Review on Underwater Collection and Transportation Equipment of Polymetallic Nodules in Deep-Sea Mining

A Review on Underwater Collection and Transportation Equipment of Polymetallic Nodules in Deep-Sea Mining

A Pressure‐Sinkage Model for Deep‐Sea Sediments Based on Variable‐Order Fractional Derivatives

A block failure model for deep-sea sediment between grousers of deep-sea mining vehicles based on elasto-plastic theory

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