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金属矿山 ›› 2020, Vol. 49 ›› Issue (09): 60-64.

• 采矿工程 • 上一篇    下一篇

矿岩初始运动对其冲击溜井井壁规律的影响

路增祥,吴晓旭,马 驰,殷 越   

  1. 1. 辽宁科技大学矿业工程学院,辽宁 鞍山 114051;2. 辽宁省金属矿产资源绿色开采工程研究中心,辽宁 鞍山 114051
  • 出版日期:2020-09-15 发布日期:2020-10-16
  • 基金资助:
    国家自然科学基金项目(编号:51774176)

Influences of Initial Movement of Ore or Rock Block on the Rule of Impacting on Orepass Wall

LU Zengxiang,WU Xiaoxu,MA Chi,YIN Yue   

  1. 1. School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China;2. Engineering Research Center of Green Mining of Metal Mineral Resources Liaoning Province,Anshan 114051,China
  • Online:2020-09-15 Published:2020-10-16

摘要: 溜井中运动的矿岩会与井壁发生碰撞并导致井壁的冲击损伤,研究矿岩在溜井中的运动规律,有利于减少矿岩与溜井井壁的碰撞概率。基于运动学原理,建立了矿岩运动初始方向与其运动规律的关系模型 ,得出了矿岩的运动轨迹方程,确立了矿岩块运动过程中与溜井井壁发生碰撞的条件,得到了矿岩块第1 次与溜井井壁发生碰撞时碰撞点的计算公式,研究了矿岩进入溜井时的初始运动对其在溜井中运动规律的影响 。研究表明:①溜井直径D、矿岩块初始速度[v0]及其方向[α]是影响矿岩块与溜井井壁碰撞的主要因素;②当D和[v0]保持不变时,随着[α]增大,碰撞位置h1越大,反之,h1越小;③当D和[α]保持不变时,随着 [v0]增大,碰撞位置h1越小,反之,h1值越大;④当[v0]和[α]保持不变时,随着D增大,碰撞位置h1越大,反之,h1越小。上述研究进一步反映出,适当增加溜井直径,选择合适结构,降低矿岩块进入溜井时的速度 ,能够降低矿岩块与溜井井壁的碰撞概率,有利于减轻溜井受冲击破坏的程度。

关键词: 矿岩运动, 运动轨迹, 垂直溜井, 井壁, 冲击规律

Abstract: The moving ore-rock block in the orepass will collide with the wall of the orepass and lead to the impact damage of the orepass wall.The study of the movement law of ore or rock block in an orepass is beneficial to reduce the collision rate between the ore-rock block and the orepass wall.Based on the kinematic principle,the relation model of the initial direction of the ore or rock block movement and its motion law is established,the movement track equation of the ore or rock is obtained,the condition of collision with the orepass wall during the movement of the ore or rock block is established,the calculation formula of the first time collision point of the ore or rock block and the orepass wall is obtained,and the influence of the initial movement of the ore-rock into the orepass is studied.It is found that:① the diameter D of the orepass, the initial velocity [v0] and direction [α] of the ore or rock block are the main factors affecting the collision between the ore or rock block and the orepass wall;② when D and [v0] remains unchanged, the value of collision position h1 increases with the increase of [α],and vice versa,the smaller the value of h1 is; ③ when D and [α] remains unchanged, with the increase of [v0],the value of collision position h1 is smaller,and on the contrary,the greater the value of h1 is;④ when and remains unchanged, with the increase of D,the value of collision position h1 is larger,and on the contrary, the smaller the value of h1 is.The study results further show that the collision probability between the ore or rock block and the orepass wall could be reduced by properly increasing the diameter of orepass,selecting the appropriate structure and reducing the speed of the ore or rock block entering the orepass,which is beneficial to reduce the degree of impact damage of the ore or rock block.

Key words: ore-rock block moving, movement track, vertical orepass, orepass wall, impact rule