On the basis of this, the problems existing in the study of water-jet rock breaking theory are reviewed out and analysed and some su…
在此基础上评述和分析了水射流破岩理论研究存在的问题，并为水射流破岩理论的研究提出了一些建议。
On the basis of this, the problems existing in the study of water-jet rock breaking theory are reviewed out and analysed and some Suggestions for the theory study are given.
在此基础上评述和分析了水射流破岩理论研究存在的问题，并为水射流破岩理论的研究提出了一些建议。
ROCK concerts, iPods, jet engines, motorcycles, snowmobiles, infections and trauma - our ears are under siege.
摇滚乐、随身听、喷气发动机、摩托车、摩托雪橇、传染病，还有外伤——我们的耳朵总是遭到围攻。
He sits on a chair in a windowless laboratory and cradles a large rock, or core, of jet-black flint in his left hand.
桑德加特坐在一间无窗户的实验室里的一张椅子上，他的左手握着一块墨黑的大燧石。
Rock stars are planning to open an unprecedented farewell concert, the site is scheduled for a a treasure 747 jet, the whole event in the air will also in an Internet channel live.
摇滚巨星计划开一个前所未有的告别演唱会，场地定于一架珍宝747客机内空中进行，整个盛事亦会在一条互联网频道现场直播。
The rock damage model and the damage-coupling model suited to analyze the whole process of water jet breaking rock were established with continuum damage mechanics and micro damage mechanics.
运用连续损伤力学和细观损伤力学理论，建立了适用于水射流破岩全过程分析的岩石损伤模型以及宏细观损伤的耦合模式。
The rock cutting techniques under deep water of practical application should consider the relations between cutting times, jet horizontally moving velocity and efficiency.
在深水环境条件下岩石切割技术的生产实际应用中，要综合考虑切割次数和射流横移速度与效率的关系；
The paper generalized the research results on water jet assisted rock fractures both at home and abroad in recent years.
概括总结了近年来国内外关于高压水射流辅助破碎岩石机理的研究成果。
The results can provided some ideas in considering the rock damage criterion for rock failure mechanism study under water jet impact.
数值分析结果可为水射流破岩机理研究中岩石破坏准则的选择提供依据。
According to practical working situation, nonlinear dynamic finite element method is adopted to establish a numerical model of combined breaking rock with high pressure water jet and mechanical bit.
采用非线性动态有限元法，结合实际工况条件，建立了高压水射流—机械齿联合破岩的数值模型。
Mechanical rock breaking is the main function of modern rotary drilling. The purpose of jet aided mechanical rock breaking is to improve the penetration rate.
现代旋转钻井破碎岩石是以机械破岩为主导方式，射流辅助机械破岩的目的是提高机械钻速。
Therefore, it is put forward herein that high seepage pressure exists locally in the rocks when under jet action, and the magnitude of seepage pressure greatly affects the rock cutting results.
为此，提出了射流作用下岩石局部范围具有较高渗流压力的思路，并认为该渗流压力大小对射流的破岩作用有重大影响。
Water jet, as a novel rock cutting tool, can be combined with mechanical method to increase penetrating efficiency.
水射流作为一种新型切割工具运用于石油钻井中，与机械联合破岩可提高破岩效率。
It has been shown that the impact pressure and changing of mechanical characteristic of rock together make it broken by abrasive water jet.
得出岩石在受到磨料射流的冲击下，磨粒与水体对岩石的冲击压力与岩石在水介质作用下力学特性的变化共同促使了岩石的破坏。
The finite element method is used to calculate and analyze the stress and the displacement of host rock when the openings is under the jet grouting support.
采用有限单元法对巷道注浆支护时的围岩应力和位移进行了计算分析。
The influence of jet position on rock chips formed ahead of bit was analyzed.
并对射流位置与刀具前方岩石碎块形成的关系进行了分析。
A computational model of rock fragmentation by high pressure jet was established with dynamic contact method.
采用动力接触法建立了高压水射流破碎岩石过程的计算模型。
Experiment shows the rock breaking efficiency of jet flow impact pressure is enhanced.
实验表明，提高了射流冲击压力的破碎岩石效率。
Water jet flow is one of the decisive factors for drilling rate during rock bit drilling.
在牙轮钻头的钻进中，水射流是钻进速度快慢的决定因素之一。
Experiments with the rock breaking ability of star-shaped jet is presented in this article.
在淹没和非淹没条件下对星形喷嘴射流的破岩能力进行了实验研究。
Ultra-high pressure jet assisted drilling is an affective approach for improving penetration speed; and influential factors and mechanism of rock breakage are key technologies.
超高压水射流辅助破岩是提高机械钻速的有效途径，水射流破岩效果影响因素及机制研究是其关键之一。
Based on the principle of cumulative charge explosion, a new kind of rock cutting blasting technique, the jet perforator charge blasting in small diameter boreholes, is developed in this paper.
本文介绍了适用于小直径炮孔爆破的岩石聚能切割爆破技术。
Meanwhile the distinction of the effects of rock permeability on swirling jet and straight jet is studied.
同时，研究了岩石渗透率对旋转射流和普通圆射流影响的区别。
The swirling water jet technique for breaking rock has good efficiency and larger breaking area.
旋转射流破岩的优势在于破碎面积大、效率高。
The development of radial horizontal well drilling technology was under the studies on swirling jet theory and rock failure mechanism.
旋转射流理论和破岩机理研究，研制了径向水平钻井技术。
The paper introduces a fitting method between water jet and PDC bit tool, that is, aid bit tool cut rock while water jet is directed from suitable location of bottom of bit tool.
介绍了一种射流与PDC刀具的配合方式，即水射流位于刀具底部适当位置辅助刀具切割破碎岩石。
It is found that under the non-submerged condition, the rock breaking ability of star-shaped jet is greater than that of round jet;
结果表明，在非淹没条件下，星形喷嘴射流的破岩能力高于常规圆形喷嘴射流；
Mechanical model of rock slotting by abrasive jet is established on the basis of rock dynamics, fluid mechanics and wave propagation theory.
在岩石动力学、流体力学、波传播理论的基础上建立了磨料射流切割岩层力学模型。
The drilling rig is mainly used in soil and rock anchoring, consolidation of road base, dam base and retaining wall, and blasting hole drilling and jet-grouting.
该钻机主要用于土、岩锚杆、路基、坝基、挡土墙加固、爆破孔等钻孔工程以及高压旋喷孔的施工。
The drilling rig is mainly used in soil and rock anchoring, consolidation of road base, dam base and retaining wall, and blasting hole drilling and jet-grouting.
该钻机主要用于土、岩锚杆、路基、坝基、挡土墙加固、爆破孔等钻孔工程以及高压旋喷孔的施工。
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