某露天矿平硐溜井井壁初始碰撞位置理论计算

发布时间：2018-05-18 15:50

本文选题：初始碰撞位置 + 碰撞恢复系数　；参考：《金属矿山》2017年05期

【摘要】：露天矿山平硐溜井运输系统中,矿石在溜井壁上的初始碰撞破坏较大,确定矿石的初始碰撞位置对于井壁的防护具有重要意义。根据运动学理论,建立矿石运动模型,以某露天矿为例,分析碰撞恢复系数、滑移滚动摩擦系数和临界系数对初始碰撞位置的影响,基于伪随机算法,确定初始碰撞位置的范围。结果表明:随着法向恢复系数、滚动滑移摩擦系数增大,切向恢复系数、临界系数减小,初始碰撞位置距井口的距离变大,滚动滑移摩擦系数是影响初始碰撞位置的主要因素;运动状态的改变对于初始碰撞位置的影响较小;碰撞范围内初始碰撞位置的分布符合指数分布,距离井口6~9 m范围内的井壁需要重点防护。
[Abstract]:In the transportation system of open pit mine, the initial collision damage of ore on the sidewall is great, so it is very important to determine the initial collision position of ore for the protection of shaft wall. Based on the kinematics theory, a model of ore movement is established. The effects of collision recovery coefficient, sliding rolling friction coefficient and critical coefficient on the initial collision location are analyzed by taking an opencast mine as an example, based on pseudorandom algorithm. Determine the range of initial collision positions. The results show that with the normal recovery coefficient, the friction coefficient of rolling slip increases, the coefficient of tangential recovery and the critical coefficient decrease, and the distance from the initial collision position to the wellhead becomes larger. The friction coefficient of rolling slip is the main factor affecting the initial collision position. The change of motion state has little effect on the initial collision position, and the distribution of the initial collision position in the collision range accords with the exponential distribution, and the shaft wall within 6m from the wellhead needs to be protected.
【作者单位】：武汉理工大学资源与环境工程学院;矿物资源加工与环境湖北省重点实验室;武汉理工大学图书馆;
【基金】：中央高校基本科研业务费专项(编号:2017IVA045,2017IVA046,2017-zy-071) 湖北省自然科学基金青年基金项目(编号:2016CFB336)
【分类号】：TD521.1

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