中山大学学报自然科学版 ›› 2019, Vol. 58 ›› Issue (5): 1-7.doi: 10.13471/j.cnki.acta.snus.2019.05.001

• 论文 •    下一篇

海底表层水合物绞吸单齿破碎仿真分析

王广申,王国荣,钟林,张亦弛,邱顺佐   

  1. 西南石油大学机电工程学院,四川 成都 610500
  • 收稿日期:2018-09-05 出版日期:2019-09-25 发布日期:2019-09-25
  • 通讯作者: 王国荣 (1977年生),男;研究方向:天然气水合物开采工艺及配套工具;E-mail:200331010023@swpu.edu.com

Simulation analysis of seabed gas hydrate cutter suction mining single tooth crushing process

WANG Guangshen, WANG Guorong, ZHONG Lin, ZHANG Yichi, QIU Shunzuo   

  1. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
  • Received:2018-09-05 Online:2019-09-25 Published:2019-09-25

摘要:

固态流化机械采掘的原位绞吸式开采是目前较为适用的海底表层水合物开采技术之一。基于离散元法建立了单齿切削水合物的拟三维数值仿真模型,对单齿切削水合物的破碎过程进行了研究。研究结果表明:1)水合物破碎仍然遵循岩石的破坏机理,纯态水合物呈塑性破坏、海洋水合物沉积呈脆性破碎;2)切削厚度越深,崩落的海洋水合物沉积物体积呈越大的趋势;3)切削厚度小于8 mm时,切削力随切削厚度成线性增大。运用三维离散元法研究绞吸头单齿破碎水合物具有可行性,其研究结果可为绞吸式机械采掘及绞吸头的设计、开采参数的制定提供依据。

关键词: 天然气水合物, 机械采掘, 离散元法, 切削破碎

Abstract:

Cutter suction gas hydrate solid state fluidized mechanical mining is one of technical solutions proposed for seabed hydrate mining. Based on the discrete element method (DEM), a quasi-3D numerical simulation model for single-tooth cutting hydrate is established to study the hydrate breaking process and the force of the cutter teeth in the cutting process. The results show that:1) Hydrate fracture still follows the failure mechanism of rock, pure hydrate is plastically destroyed, and marine hydrate deposition is brittle fracture; 2) the deeper of cutting thickness, the larger volume of the collapsed marine hydrate deposits; 3) when the cutting thickness is less than 8 mm, the cutting force increases linearly with the cutting thickness. The feasibility of study to crush hydrate by threedimensional discrete element method. The research results can provide basis for the design and mining parameters of the cutter suction mechanical mining and the cutter head.

Key words: natural gas hydrate, mechanical mining, discrete element method, cutting and breaking

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