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- As a result,the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly,then stoping ore pillar by medium length hole caving method. 后沟金矿采用平底结构浅孔留矿法先采矿房,后用中深孔崩落法回采矿柱,经两年多的生产实践,取得较好的技术经济指标。
- Application of Short Hole Shrinkage Method in Gently Inclined Thick Ore Body 浅孔留矿法在缓倾斜中厚矿体中的应用
- Application of the Primary Filling System Following the Short Hole Shrinkage Method in Fengning Silver Mine of Hebei Province 浅孔留矿嗣后一次充填采矿法在河北省丰宁银矿的应用
- Even on a short hole, this is really hard to do. 尽管是在最短的距离,那么这种动作也是非常具有高难度的。
- Practice shows that shallow hole shrinkage stoping method greatly decreased mining workload,lessened mining time,and increased mining efficiency. 实践证明,改进后大大减少了采切工程量,缩短了施工时间,提高了生产效率,为同类矿山提供了经验。
- The WHF method,maily,emphasizes,decentral,real,press,effect,ofdeforgings,it has better results in solving of the metallurgical defects such as ingot segregation,central porosity,hole shrinkage. WHF法主要强调锻件的中心压实效应,对于解决因冶炼带来的锭型偏析、中心疏松、缩孔等缺陷有较好的效果,而且针对性强、方便适用,因此被广泛应用于大、中型轴类件的生产。
- shrinkage stoping with short hole 浅孔留矿法
- The feasibility of which short-hole shrinkage method is used for mining of low-grade and submarginal ores in Huanren Mine is demonstrated in this paper. 论证了采用浅孔留矿法对桓仁矿北岔区的低品位矿及表外矿进行综合回收的可行性。
- The shrinkage method is a kind of the open-stope method, Which has many obvi-ous advantages, Such as, simple technology, low cost and high labour productivity , etc. 留矿法是空场采矿法的一种,空场采矿法具有工艺简单、成本低、劳动生产率高等突出优点。
- The numerical experiments show that the proposed method can significantly raise SNR, decrease MSE and preserve the shape of signal better than the original wavelet shrinkage method. 数值仿真表明,与小波阈值收缩方法相比,该方法在信噪比和均方差指标上都有明显的提高,并能很好地保持信号的形状。
- The shrinkage method and the cut wall filling method were used to mine the steep orebody with a high grade in Dashuiqing gold mine, which resuled in greater dilution and loss as well as the unsafe. 大水清金矿曾用留矿法、削壁充填法开采高品位急倾斜矿体,贫化、损失率较大,且存在不安全因素。
- Design Principle and Construction Expriences of Shrinkage Stoping with Short Hole in Vein Gold Mine 岩金矿山浅孔留矿法的设计原则和施工经验
- Your work falls short of my expectations. 你的工作未达到我的期望。
- Our escape was little short of miraculous. 我们能逃脱简直是个奇迹。
- Bottom Structure Evolvement and Effect of Shallow Hole Shrinkage Stoping System 浅眼留矿法的底部结构演化及其效果
- The CAD System for Hard Alloy Variable- position Short Hole Drill 硬质合金可转位浅孔钻CAD系统
- In the short term, the medicine may not be very effective. 从眼前来看,这药可能疗效不是很大。
- The hope of a short war went glimmering. 战争无望在短期内结束。
- Study on Advancing Form of Working Face with Shrinkage Method 留矿法工作面推进形式的研究
- Nothing short of this could mend the case. 不这样就不能挽回局面。