多分段多进路矩形放矿口尺寸对出矿效果的影响
投稿时间:2019-09-25  修订日期:2019-09-25  点此下载全文
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作者单位E-mail
张治强 辽宁科技大学矿业工程学院 634870500@qq.com 
杨建东 辽宁科技大学矿业工程学院  
于志宏 金诚信矿业管理股份有限公司  
马 驰 辽宁科技大学矿业工程学院  
基金项目:“十二五”国家科技支撑计划课题(编号:2013BAB02B08);辽宁省金属矿产资源绿色开采工程研究中心开放课题(编号:USTLKFGJ201604)
中文摘要:针对无底柱分段崩落法岩石混入率较高、矿石损失较大的问题,应用多分段多进路的相似模型,进行了不同放矿口高度和宽度条件下的放矿实验,从散体流动性的影响因素和散体压力平衡拱的形成与破坏的角度,分析了矿石回收率和岩石混入率的变化规律。结果表明:当同一分段的各进路同时出矿时,适当扩大放矿口宽度或者降低放矿口高度能够增加矿石移动带宽度,改善矿石流动性,提高矿石回收率,降低岩石混入率,而且每一个分段的矿石回收率也得到明显提升。
中文关键词:散体流动性  放矿口尺寸  放矿效果  回收率  岩石混入率
 
Influence of dimension of rectangular ore drawing hole with multi-sublevel and multi-way on ore drawing effect
Abstract:Aiming at the problems of high rock mixed rate and large ore loss in sublevel caving without sill pillar, the drawing experiments under different height and width of ore-drawing hole were carried out by using the similar model of multi-sublevel and multi-path. From the angle of influencing factors of granules fluidity and formation and destruction of granules pressure balance arch, the variation laws of ore recovery and rock mixed rate were analyzed. The resulted show that when all mining approach of the same sublevel were mined at the same time, properly enlarging the width or reducing the height of the ore-drawing hole could increase the ore moving bandwidth, improve the ore fluidity, increase the ore recovery and reduce the rock mixed rate, and the ore recovery rate of each sublevel was also significantly increased.
keywords:granules liquidity  sizes of ore draw hole  ore drawing effect  recovery  rock mixed rate
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