岩石的

The mathematical model for formulation design and optimization of expanded ammonium nitrate rock explosive is also studied.

文中论述了含C、H、O、N元素的工业炸药配方设计数学模型的建构方法，研究了岩石膨化硝铵炸药配方设计及最优化的数学模型，给出了岩石膨化硝铵炸药配方设计及最优化数学模型的计算机计算结果。

The stress distribution on the wall of directional well is analysed, and a borehole stability model for the formation with dip angle in directional well is established. The influences of dip angle and trend on borehole stability are discussed.

建立了弱面地层数学模型，分析了斜井井壁岩石应力状态，推导出了井壁岩石最大主应力与低强度地层法向夹角的计算公式，建立了用于大倾角地层钻井液密度安全下限的力学模型，详细分析了倾斜地层的倾角和走向对井壁稳定性的影响。

Because fluid pressure and rock stress change during sealed coring process, the degasification and rock pore volume change. As a result, there is difference between laboratory measuring saturation with in-situ saturation. Therefore the laboratory measuring fluid saturation has to be corrected to predict the in-situ fluid saturation.

在密闭取心过程中，由于流体压力和岩石应力的改变，导致流体脱气和岩石孔隙度改变，因此室内测定的岩心含水饱和度和实际油藏含水饱和度存在较大的误差，有必要将室内测定的含水饱和度校正到油藏条件下。

To the same kind of rocks, the penetration rate increases with the increases of electric bit thermal power. When electric bit thermal power keeps fixedness, the penetration rate increases in various degrees with the increases of bit load in difference rocks. Increasing the bit load is beneficial to improve the quality of glass hole wall, but the bit load should not be too big.

对于同一种岩石，钻进速度随钻头电热功率的增大而增大；当钻头电热功率不变时，根据所钻岩石岩性的不同，钻进速度随钻头轴载的增大而不同程度地增大，增加钻头轴载有利于提高玻璃状孔壁的质量，但不宜过大。

Numerical calculation of FEM and experimental investigations are used in the present research. The influence of loading condition and size of indenter on the tensile strength of rock has been investigated. The results obtained by numerical calculation and experiments show that tensile strength of rock will increase with the increase of indenter size.

通过有限元数值计算与理论分析相结合的方法，对不同载荷接触条件和接触面宽度角下的岩石抗拉强度进行了深入分析，结果表明，在圆弧形和平台加载条件下计算的岩石抗拉强度随载荷接触宽度角α的增大而增大。

Because the underground reservoir rock is under high pressure and high temprature, it is very important to determine the relation between rock velocities and various pressures.

油气储层岩石在地下都处于高温和高压的环境，研究弹性波速度和各种压力的关系是岩石物性研究的重要内容。

Where strange rocks, some as high processes, eliminate some of the ground settlement as deep gully, and some plain like thousands of miles, as well as the rock moss longer, if the endless oasis.

那里的岩石千奇百怪，有的高高突起像高山峻岭，有的坑洼地陷像深谷沟壑，有的如履平地似万里平原，还有的岩石上长了苔藓，若一望无际的绿洲。

Trail conditions were generally good, but included a variety of terrain including a lot of loose sharp rocks, some boulders, rock hopping, and some pretty steep and rocky parts with good ankle-twisting potential.

平地的条件是相当好的，但是包括各种地形，像尖岩石，一些大石头，和陡峭的岩石，这些都有可能会扭到脚。

"If you find a rock in one place which has the same suite of fossils as a rock in another place, you can be certain they are of a relative age," he explains.

他解释道：&如果你发现，一个地方的岩石和另一个地方的岩石有同类化石，你就可以确定，它们的年代相近。&

Rocks from the Earth"s mantle seldom see the sunlight. It"s only in places where tectonic plates have collided, like California, that mantle rock―loaded with magnesium, iron, nickel, chromium, cobalt, but low in calcium―has been squeezed to the surface.

来自地幔的岩石难见天日，只有在那些构造板块相互冲撞挤压的地方，就如加利福尼亚，地幔的岩石――富含镁、铁、镍、铬、钴，却含钙极少――被挤压到地面上来。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。