摘要
深海多金属结核采矿车作业时行走履带板齿间粘附的底质会影响行驶性能,因此利用淹没水射流减粘脱附。针对采矿车行走履带板齿间粘附底质的成因,利用采矿车牵引力模型分析了牵引力与履齿有效高度的关系,通过土体临界破坏力理论和淹没水射流理论,导出了无量纲冲坑半径与深度方程。结果表明:行走履带与底质相互作用致使履带板、齿间粘附一定底质,牵引力随履齿剪切未扰动底质的有效深度减少而减小,推荐履齿高度在100~150mm之间;无量纲冲坑深度随半径先缓慢增加后快速增加,与水射流参数、靶距、底质临界破坏力有关,水射流参数为1<r/bp<2,0.4<h/l<3时,减粘效果较好。此研究对深海多金属结核采矿车减粘脱附系统设计有重要参考价值。
When the deep-sea polymetallic nodule mining vehicle is working,the sediment adhesion between the teeth and shoes of the tracks will affect the driving performance,so the submerged water jet is used to reduce the sediment adhesion.Aiming at the cause of the sediment adhesion between the teeth and shoes of the walking tracks,the relationship between the traction and the effective height of the teeth was analyzed by using the traction model of the mining vehicle.Based on the critical failure force theory of the soil and the submerged water jet theory,the dimensionless scour radius and depth equation were derived.The results showed that the interaction between the walking track and the sediment resulted in the sediment adhesion between the track shoes and the teeth.The traction decreased with the reduction of the effective depth of the undisturbed sediment,and the recommended height of the teeth was between 100~150 mm.The dimensionless depth of scour hole increased with the radius slowly at first and then rapidly,which was related to the water jet parameters,target distance and the critical destructive force of the sediment.When the water jet parameters were 1<r/bp<2 and 0.4<h/l<3,the effect of adhesion reduction was good.This study had an important reference value for the design of adhesion reducing system in deep-sea polymeallic nodule mining vehicle.
作者
李静伟
尹柏霖
陈秉正
吴鸿云
李江明
刘伟
LI Jingwei;YIN Bolin;CHEN Bingzheng;WU Hongyun;LI Jiangming;LIU Wei(Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第2期128-133,共6页
Mining Research and Development
基金
“十三五”国家重点研发计划项目(2016YFC0304100)
关键词
深海采矿车
牵引力
减粘
淹没水射流
冲坑
Deep-sea mining vehicle
Traction
Reduce sediment
Submerged water jet
Scour hole
