查询词典 rock-magma

We can attain the habitues of stability of rock mass advanced by forecasting the deformation, and we can adopt necessary control methods, and insure the stability and safety of rock mass engineering.

通过预测围岩体的变形，可以事先了解巷道的稳定状态，从而可以根据需要采取必要的控制措施，以最小的代价保证工程的稳定安全。

But the real focus of shoring in hard rock, the rock Zaocheng a trapezoidal shape of right-angle look, and then insert-beam, and right-angle ladder to fully close some acute angle, using principles of mechanics into a half-beam as the base.

而真正的重心撑在坚硬岩石里，岩石凿成了形似直角梯形的样子，然后插入飞梁，使其与直角梯形锐角部分充分接近，利用力学原理半插飞梁为基。

In regard of the problems of large holes to be bored, deep boring into rock and complicated rock layers in construction of bored pile foundations of in\|water piers of main spans of Wuhu Changjiang River Bridge, selection and structural features of cutter heads and hobs of the boring equipment used are described.

针对芜湖长江大桥正桥水中墩钻孔桩基础施工中存在的孔径大、钻岩深、岩层复杂等问题，阐述钻孔设备中刀盘和刀具的选用要求及结构特征。

Indenters of different shape have different effects of rock-breakuge,To the four kinds kfindenters used in the experiment the rock-breakage ef fect a farc-prism indenter is the best.

不同形状齿形的破岩效果不同，试验所用的四种齿形中弧齿的破岩效果最好。

Experimental rock specimens were collected from the eastern Sichuan and northern Xinjiang provinces,and the stress isopleths to the rock specimens were calculated with a finite element method for accurate determination.

实验岩石样品采自四川东部和新疆北部地区，为测试准确起见，对岩样进行了应力等值线的有限元法计算。

Water jet ; rock breakage ; rock damage model ; fluid-wall interaction ; finite element method

水射流；岩石破碎；岩石损伤模型；流固耦合；有限元方法

High pressure water jet ; rock fragment ; finite element method ; fluid rock interactions ; numerical calculation

高压水射流；岩石破碎；有限元法；流固耦合；数值计算

In this paper, an idea is presented about a larger pressure of percolation flow existed in a part of rock by a high-pressure jet, and the pressure has great effect on the rock fragmentation with jet. A model of calculating the pressure is established.

本文提出了射流作用下岩石局部范围具有较高渗流压力的思想，并认为该渗流压力大小对射流破岩有重要影响，建立了该渗流压力的计算模型。

The numerical results of water jet breaking rock agree with the experimental conclusion. A valid approach to the process of water jet breaking rock sh...

数值计算的结果较真实地反映了水射流破岩过程中岩石的动态响应以及水射流动力学特性的演化过程，并与相关试验规律吻合良好，这表明该分析方法是有效的，可用来指导高压水射流破岩理论的进一步研究及应用。

The high-pressure jet is applied widely to the fragmentation of the rock in drilling engineering, but the mechanism of rock fragmentation with jet is not very clear by now.

高压射流辅助破岩在油气井钻井工程中得到广泛应用，其破岩机理还很不明了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。