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日本大部分大型石灰石矿都是用具有大型垂直或倾斜的溜井系统将矿石从台阶输送到破碎硐室。尽管矿石在溜井系统中的混合特性和重力流动的机理对矿山产品的质量控制很重要,但大部分石灰石矿对其并不了解。我们认为,混合特性取决于矿石特性、溜井系统的几何形状,同时也取决于矿石在溜井系统中重力流动的机理。根据在田海石灰石矿溜井中的所谓“喘气”现象的观测,我们提出一个考虑由于矿石的2次动作弓I起的假比重(我国习惯叫法为体重。——译者注)变化的重力流动以及在局部形成小拱的模式。利用这种模式将能够易于解释矿石生产过程中溜井所产生的一些现象。将重力流动模式用于斜溜井的情况表明,斜溜井中矿石的混合特性也可能取决于斜溜井的长度。
Most large limestone mines in Japan transport ore from the steps to the crushing chamber using a large vertical or inclined chute system. Although the nature of mixing and the mechanism of gravity flow in ore-handling systems are important for the quality control of mining products, most limestone mines do not understand them. We believe that the mixing behavior depends on the characteristics of the ore, the geometry of the chute system, and on the gravity flow mechanism of the ore in the chute system. Based on observations of the so-called “panting” phenomenon in Tianhai limestone mine slipways, we propose a gravity flow that takes into account varying gravity due to the two actions of the ores (as I used to call them weight.) As well as the pattern of small arches formed locally. The use of this model will make it easy to explain some of the phenomena that have occurred in the chute during ore production. The application of the gravity flow model to inclined chutes shows that the mixing characteristics of the ores in the inclined chutes can also depend on the length of the inclined chutes.