岩石

Based on the experimental results of axial strain, dilatancy capacity and volumetric strain of two kinds of rocks under zero confining pressure, some new knowledge has been gained.

首次采用&零围压单轴试验&对煤系地层两种岩石试样的剪胀力进行了系统测定及分析，得到一系列新的认识，对深入研究软岩巷道剪胀变形压力以及建立岩石类材料本构方程提供了实验依据，开拓了新的研究思路

Porosity is defined as the ratio of the void space in a rock to the bulk volume of that rock multiplied by 100 to express in per cent.

从油藏工程的观点来看，孔隙度是岩石最重要的特性之一，它用来量度岩石中用以储存石油烃类物质的有效空间。

Analytic solution and numerical solution are obtained for predicting tunnel water inflows and water head under the condition of an exponential decrease of hydraulic conductivity with depth in an isotropic jointed rock mass.

根据各向同性岩石中隔水边界与水平方向的夹角，在岩石渗透性随深度呈负指数衰减条件下，分两种情况给出了二维稳定流隧道涌水量的解析解和数值解。

These 2,500-year-old petroglyphs, portraying figures with tulip-shaped heads and hourglass bodies, mark an ancient human presence in the Sahara desert's Air Mountains.

在撒哈拉沙漠的埃尔山脉，有着超过2500年历史的岩石雕刻，岩石上刻画有郁金香形状的头和沙漏形状身体的人形，描绘的是古老人类的出场。

Analysis of experimental results confirm that the rising of temperature is equivalent to the reducing the frequency. The time-temperature equivalence is a commonness of saturated porous rocks.

试验结果表明，饱和多孔岩石都具有一个共同的特性－时间和温度的等效性，即降低温度与增加振动频率是等效的，这就是饱和多孔岩石的驰豫共性。

You can also use the rock and cord technique where you place a 1.5 rock under the two tarp layer and then squize the tapes into a narrow neck around the rock and tie this tight with a cord.

您也可以使用岩石和脊髓技术，您一个1.5 岩下的两个篷布层，然后squize到磁带一个狭窄的颈部周围的岩石和领带这个紧凑的脊髓。

The paper also based on mechanics of fracture, rock mechanics, mechanics of materials, sort the rock failure and spread into four models, and the model of the thrust spread of fault is firstly advanced.

文章同时基于断裂力学、岩石力学以及材料力学理论，将岩石破裂扩展概括为四种主要模式，并首次提出了断层的逆冲破裂扩展模式。

Based on elastic-plastic constitutive model of the rocks, the author, adopting the sliding block - spring combination system, studies the mechanics model of the shear band and obtains the starting conditions of deformation localization controlled by such a mechanics model.

基于岩石的弹塑性本构关系，采用滑块—弹簧组合系统研究了岩石剪切带形成的力学模型，并得出了该力学模型控制的变形局部化起动条件。

In this paper,we develop the equations to determine the differential stresses for normal and reverse faults, which increase with depth and are related to the initial shear strength and the angle of inner fraction of rocks on the surface.

正、逆断层发生时的差应力大小随埋深的增大而增大；在地表条件下，正、逆断层发生时的差应力与岩石初始抗剪强度和岩石的内摩擦角有关。

Through methane simulation experiment on ignition and blasting due to seam roof rock friction in Qinshui Coal Mining District of Yangcheng, it is shown that sparks will be generated through friction while caving ,causing gas and water mixture to fire, it is big hidden sources which cause methane blasting accident in goaf.

通过对阳城沁水矿区煤层顶板岩石相互摩擦引燃引爆瓦斯模拟实验，得出&岩石在冒落过程中相互撞击摩擦产生火花，可能引起瓦斯与空气混合物着火，是造成采空区瓦斯爆炸事故引爆源&的结论。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。