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- Compared to normal ore drawing,the eccentricity of ellipsoid,the viscosity resistance and inner friction amo... 散体颗粒受振运动是一种不规则、复杂和随机的运动,具有分形特征,对其进行了分形分析和模拟。
- Based on making a study of them, the single cut-off grade for ore drawing is regarded as les... 通过研究分析,认为单一截止品位放矿方法与其他两种方法相比,在理论上没有优势和发展潜力。
- Based on the technical and economical index, an optimal decision for the cutoff grade of ore drawing is presented. 在获取矿石技术经济指标的基础上，对截止放矿品位进行了优选政策。
- Cut-off grade method has been used to control the ore drawing in non-pillar sublevel caving mining both in and outside China. 采用无底柱分段崩落采矿法,国内外一直采用截止品位放矿法来控制出矿。
- Taking Jingtieshan Mine as an example,the peper deals with several problems with applying non-dilution ore drawing mw thod. 以镜铁山矿为例研究了无贫化放矿方式在矿山应用的若干问题。
- Research shows that main cause of ore dilution in sublevel caving mining is tlnrational cut-off grade drawing.Non-dilution ore drawing is most ideal drawing mede. 研究表明，造成无底柱分段崩落法来出矿石贫比大的根本原因在于采用了不合理的截止品位放矿方式，无贫化放矿是无底柱分段崩落法最为理想的放矿方式。
- In the light of the problems in the nonpillar mining, the formation and principles of the wide spacing and the low lean ore drawing process are presented. 针对无底柱采矿存在的问题,阐述了大间距与低贫化工艺的形成及原理,采用该结构及工艺是降低产品成本的有效方法。
- In order to seek reasonable cut-off grade for ore drawing in subdrifting and caving without sill pillar, the relative researchers have put forward various theories and methods. 为寻求无底柱分段崩落采矿法合理的放矿截止品位,众多研究者进行了大量的研究,提出了多种理论和方法。
- Continuous mining for ore drawing and hauling in stope is one of the important achieve-ments in the research area of continuous mining technology in China. 采场出矿运矿连续作业，是近年来我国在连续工艺技术研究领域中所取得的重大成果之一。
- Research on continuous ore drawing and haulage equipment for underground metal mines has widely been done in main foreign countries with mining industry. 国外主要矿业国家对地下金属矿山连续出矿运矿设备进行了深入的研究。
- The low dilution mode of ore drawing requies that ore quality management be suited to the feature of ore and rock movement during ore drawing in sublevel caving. 无底柱分段崩落法低贫化放矿方式要求限制废石漏斗在出矿口的破裂。
- Aceording to the diffcrent conditions of mines applied non-sill sublevel caving method,various programmes for application of non-dilution ore drawing mothod are presented. 并根据无底柱分段崩落法矿山的不同情况，提出了各种应用无贫化放矿的实施方案。
- After analyzing the movement law of ore drawing body,the basic parameters of sublevel mine in a gold mine are calculated by the experiment result of single model and surface model in a lab. 介绍了无底柱分段崩落法放矿基本原理,利用室内单体模型和平面模型的放矿试验,分析了放矿体的流动规律,并据此确定了某金矿无底柱分段崩落法的基本结构参数。
- This paper introduces in detail three of the probability distribution equations corresponding to ore drawing under infinite, semi-infinite and dip-wall boundaries in caving system. 发现三类边界条件下的颗粒移动概率均可用正态分布函数表示，其方差值与层面高度成幂函数关系（）。
- YZZ vibration flow aiding machine is a newly developed ore drawing device, which is devised on the basis of the theory of autogenuous synchronization and directional vibro excitation. 采用自同步定向激振理论设计,将重力自溜与振动出矿融为一体的YZZ型振动助流器,具有分节组合、大倾角、无侧板的结构特点。
- The ore dilution takes second place.When ore drawing is proportional by three drawing points, ore rock interface is short and dropped parallelly.The dilution and loss index are the fewest among them. 采用左中右三个出矿口均衡放矿时，矿岩界面最短且近似平行下降，矿石贫化与损失最少。
- The ore is smelted in this large factory. 这个大型工厂里熔炼矿石。
- Do you mind if I draw up the blinds? 我卷起窗帘你不反对吧？
- First, ore is mixed with coke and limestone. 先把铁矿石和焦碳、石灰石混合在一起。
- We will make an assay of the ore that he brought. 我们将对他带来的矿石做实验鉴定。
