应用数学和力学2025，Vol.46Issue(12)：1598-1611,14.DOI:10.21656/1000-0887.450329
深海多金属结核抽吸式集矿运动特性研究
Study on the Motion Characteristics of Suction-Based Deep-Sea Polymetallic Nodule Mining
摘要
Abstract
Polymetallic nodule mineral resources are distributed planarly in the form of coarse-grained nodules on the deep seabed.Owing to the fragility of the deep-sea environment and the urgency of environmental pro-tection of the international seabed,it is of practical significance to study the collection rate and the disturbance of the seabed under different operating conditions during the movement of the mineral collecting device.A cou-pled computational fluid dynamics and discrete element method(CFD-DEM)was used to simulate the collec-tion process of coarse-grained ore under the action of a suction collector pipe.The results show that,the tilted placement of the pipe facilitates the pumping of massive ores on the downstream side of the pipe,which is con-ducive to improving the particle collection rate.The horizontal movement of the collector pipe and the suction movement of the pipeline form a superposition of disturbances to the flow field;under the superposed disturb-ances,the particle collection rate increases and then decreases with the collector pipe horizontal movement speed,and increases with the collector pipe tilt angle to a certain extent.The turbulent kinetic energy of the seafloor decreases with the collector pipe horizontal movement speed,and increases and then decreases with the collector pipe tilt angle.Comprehensive analysis indicates that,the collector pipe horizontal movement speed of 0.6 m/s and the collector pipe tilt angle of 45° are the optimal working conditions to meet the require-ments of high collection rates and low environmental disturbances in the parameter range of the study.The re-sults can be used as a reference for the design of deep-sea polymetallic nodule collecting devices with high col-lection rates and low environmental disturbances.关键词
深海采矿/抽吸式集矿/颗粒运动/采集率/海底扰动/CFD-DEMKey words
deep-sea mining/suction collection/particle motion/collection rate/seafloor disturbance/CFD-DEM分类
数理科学引用本文复制引用
薛景天,夏秋,贾浩,李宸..深海多金属结核抽吸式集矿运动特性研究[J].应用数学和力学,2025,46(12):1598-1611,14.基金项目
国家自然科学基金(52206056) （52206056）
国家级大学生创新创业训练计划项目(202410338046) （202410338046）
浙江省自然科学基金(ZCLY24E0601)本文作者衷心感谢浙江理工大学基本科研业务费(24242120-Y)对本文的资助. （ZCLY24E0601）
