开采

Although much of the high-grade ore has been used, there remains enough low-grade ore to last for centuries

品位高的富铁矿已经开采很多，品位低的铁矿还够开采若干个世纪。

Central Minmetals is a large-sized mineral enterprise on exploration, mining and mineral separating black mental e.g.

目前开采矿区面积50.6平方公里，计划2009年开采面积将达100平方公里。

Article 19 With approval by relevant departments under the Hainan Provincial Peoples Government, foreign businesses may explore and exploit mineral resources to Hainan Island under the principle of earning profits by rational exploitation in the form of joint equity or contractual venturers or ventures of sole investment.

第十九条经海南省人民政府有关部门批准，外商可按照有偿合理开采的原则，以合资经营、合作经营或独资经营方式，勘探开采海南岛的矿产资源。

From the viewpoint of systems engineering the paper has studied the method and theo-ry of the stepwise mining limit for the inclined ore bed with the help of operational research and computer.

本文从系统工程的角度出发，运用运筹学和计算机，对倾斜矿床露天开采分期境界优化的方法和理论进行了探讨；在倾斜矿床露天矿长远规划模型的基础上，建立了分期开采境界优化模型。

And mining, the mining machinery, the mining slope ramp project are the design main bodies, in mining used advanced low poor has damaged the non-lower column partition to come down the law, will have the huge economic efficiency, the special mining slope ramp project, mainly included the slope ramp position the determination, the slope ramp form choice, the slope ramp cross section specification, the slope ramp slope, slope ramp aspect and so on curve design, slope ramp construction contents.

其中采矿、矿山机械、开采斜坡道工程是设计的主体，采矿中采用了先进的低贫损无底柱分段崩落法，将产生巨大的经济效益，专题开采斜坡道工程，主要包括斜坡道位置的确定、斜坡道形式的选择、斜坡道的断面规格、斜坡道坡度、斜坡道弯道设计、斜坡道施工等方面的内容。

And mining, the mining machinery, the mining slope ramp project are the design main bodies, in mining used advanced low poor has damaged the non-lower column partition to come down the law, will have the huge economic efficiency, the special mining slope ramp project, mainly included the slope ramp position the determination, the slope ramp form choice, the slope ramp cross section specification, the slope ramp slope, slope ramp aspect and so on curve design, slope ramp construction contents.

其中采矿、矿山机械、开采斜坡道工程是设计旳主体，采矿中采用le先进的低贫损无底柱分段崩落法，将产生巨大的经济效益，专题开采斜坡道工程，主要包括斜坡道位置确实定、斜坡道形式的选择、斜坡道的断面规格、斜坡道坡度、斜坡道弯道设计、斜坡道施工等方面的内容。

With the development of oil exploration and drilling technology level, high-viscosity and high pour point crude exploitation is in an increasing proportion.

中文摘要：随着石油开采和钻井技术水平的提高，高粘度、高凝固点原油的开采比例越来越大。

The data provides which after the geological department reconnaissance and the mineral resource department, in which is putting down the Pingan and Yanjia hometown area, the ore quality is pure, achieves the national quartz sand minerals mining standard.

经地质部门勘查及矿产资源部门提供的数据，其中探明矿产分布在平安乡、闫家乡一带，二氧化硅含量高，品质纯正，储藏量较大，易开采，达到国家石英砂矿产开采标准。

Considering the precondition that coal mining in western area must protect good water resources, the developing height to grasp the movement and failure of overburden strata and the relationship between water-flowing fractured zone and overlying water are researched.

结合西部地区煤炭资源的开采必须要保护好水资源这一前提，研究覆岩中导水裂隙带的发育高度，掌握覆岩的移动破坏规律和导水裂隙带与上覆水体之间的关系，从而合理确定煤层的安全开采上限和采煤方法，对于实现矿井的安全生产、保水采煤及生态环境保护，都具有十分重要的理论意义与实际价值。

According to experiment results, the characteristics of subsidence velocity is analyzed, and the view is presented that maxinum subsidence velocity is the function of the mining area.

根据实验结果分析了采动下沉速度变化的特点，提出了最大下沉速度值是开采面积的函数，并根据下沉速度曲线的特征，建立了在不同开采面积下某一层位的下沉速度函数形式，最后根据下沉速度与下沉值的关系推导出动态下沉值的计算公式。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。