开采

While strip mining is most suitable for level areas, a method has also been devised for working in hilly regions.

如果说剥离开采最适用于平缓的地形的话，那么对山坡地形的开采也设计有一种开采方法。

While strip mining is most suitable for level areas, a method has also been devise d for working in hilly regions.

如果说剥离开采最适用于平缓的地形的话，那么对山坡地形的开采也设计有一种开采方法。

Have disastrous environmental effects, especially strip or surface mining. Roughlyby strip mining.

有关煤的使用的最大问题之一在于煤的开采可能会造成灾难性的环境破坏，特别是掠夺式的开采或表面开采。

So, in order to achieve safety mining , itis necessary in the course of underground mining that research the super terrane moving-rule and the effect on ground movement and the stope ground pressure's regularities ofdistribution.

因此，为实现矿山的安全开采，在地下开采过程中，必须对地下开采引起的上覆岩层的移动规律及其对地表移动的影响和采场地压分布规律进行研究。

Based on a mathematical model assuming that dissociation of hydrate in the porous media takes place in constant temperature boundary condition, the analytical temperature distributions in dissociated and undissociated zones were solved, and thermal efficiency and energy efficiency were derived.

将多孔介质中天然气水合物在热力作用下的分解过程看作一个移动边界问题，在求解等温边界条件下水合物地层中分解区和未分解区温度场的基础上，推导出热力法开采水合物过程中开采热效率（用于水合物分解的热量与输入热量之比）和能量效率（开采所得甲烷气体的总热值与输入能量之比）的解析表达式。

A numerical model of 3D, four phases, multicomponent percolation and a balance equation for rock unit are established and solved by using effective stress theory, mass conservation theory, virtual displacement theory and lost work equivalence principle.

热采作为一种有效的稠油开采方式虽然被广泛采用，但其开采成本相对较高；而出砂冷采作为一种低成本的稠油开采方式，近年来已经在稠油油藏的开发中得到很好的应用。

With the mine scale enhance and the mine toward deep level, the problem of the timbering and the maintenance of soft rock roadway is becoming more aculeated. It is the key of the mine toward deep leve and the safety mine Whether can we solve the problem of soft rock roadway timbering.

随着矿井开采规模的加强和开采向纵深发展，软岩巷道的支护与维护问题显得越来越突出，能否解决好软岩巷道的支护等问题，是煤炭开采向纵深发展和安全生产的关键。

In view of the characteristics of low permeability and difficulty to define the minable and unminable of coal in China,the concept of gas mixture enhanced coalbed met...

针对我国煤层渗透率普遍较低，不开采煤层与要开采煤层难以界定的特点，提出了着眼于低渗透要开采煤层，以提高煤层气产气流量为直接目的，以防治瓦斯灾害为最终目的的混合气体驱替煤层气的概念。

In view of the problem of deep deposits caving minning, through the recalling of deep deposit caving mining new technologies, sublevel caving with throughout-frontal ore drawing is put forward, which can recall all of the rocks of the ore, and the ore has the best recovery parameters, the high extraction strength, more favorable conditions of work safety.

针对深厚矿床崩落开采法的问题，通过回顾深部矿床崩落开采法的新技术，提出改进的端部放矿分段崩落采矿法，在矿井能够从跨落的岩石下回收所有的矿石，具有最好的矿石回收参数，高开采强度，较有利的安全的工作条件。

Article 30 While mining major minerals, a mining enterprise shall, in accordance with a unified plan, carry out comprehensive mining and utilization of paragenetic and associated minerals that are of industrial value, so as to avoid waste.

第三十条在开采主要矿产的同时，对具有工业价值的共生和伴生矿产应当统一规划，综合开采，综合利用，防止浪费；对暂时不能综合开采或者必须同时采出而暂时还不能综合利用的矿产以及含有有用组分的尾矿，应当采取有效的保护措施，防止损失破坏。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了