放矿过程中溜井底部压力变化规律  

Pressure Variation at Ore Pass Bottom During Ore Drawing Process

作　　者：金长宇[1] 金岐岭 江权[3] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]中冶北方工程技术有限公司,辽宁鞍山114002 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《东北大学学报（自然科学版）》2012年第6期887-890,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(40902090,51109035);中央高校基本科研业务费专项资金资助项目(N110401006)

摘　　要：溜井放矿过程中其底部压力大小与变化规律始终沿用传统的Janssen公式计算,但结果往往大于实际溜井底部承受的压力.通过数值分析与室内试验研究发现,溜井放矿过程中其底部压力基本上保持一定值,其压力并不随着溜井内部矿体高度的变化出现波动.并且根据室内试验的成果,提出了溜井放矿过程中第三种压力状态下底板压力的计算公式,通过与室内试验结果的比较发现,该公式能够较好地计算出溜井底部压力大小,为研究溜井放矿过程中矿体的流动形式提供了基础.The Janssen equation has been used to calculate the pressure variation at ore pass bottom during ore drawing process. However, the result calculated with the Janssen equation is usually larger than the practical one. According to the numerical analysis and laboratory tests, it is found that the pressure at the bottom maintains a certain value and it does not changes with the ore body height in the drop shaft. Based on the laboratory test data, the formula used to calculate the pressure at the bottom under the third kind of static pressure condition during ore drawing process is proposed. Comparing with the laboratory test results, the formula can well predict the pressure at the bottom of the ore pass and it provides the referential research basis for the flow patterns of the ore body during its drawing process.

关 键 词：散体力学 溜井 Janssen公式 底部压力 离散元 

分 类 号：TG335.58[金属学及工艺—金属压力加工]