岩石

According to various of the technical difficulties such as low drilling efficiency in hard rock and short service life of diamond drilling bit, analysis was made on the inherent links between blade-extruding of hot-pressing diamond and rock abrasiveness.

中文摘要：针对在坚硬致密岩石中钻进时效低和钻头使用寿命短的技术难题，分析了热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于金刚石出刃，从而能提高钻进速度。

In order to solve the problem of low efficiency and short service life of hot pressed diamond bit when drilling in hard and compact formation, relations between diamond exposure of hot pressed bit and rock abrasiveness were analyzed in this paper. Research on matrix performances of hot-pressed diamond bit was firstly carried out.

针对在硬而致密岩石中钻进时效低的难题，本文分析了碳化钨基热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键，硬而带脆性的胎体性能有利于全刚石出刃，从而能提高钻进速度。

Damage mechanics analysises aeolotropy from joint、 crack within rock, offers new thinking for research of the joint rock, superiority to solving damage and destroy of rock as brittle material.

损伤力学从岩石内部的节理、裂隙着手，分析其各向异性，为节理岩体的研究提供新思路，对于解决岩石这类脆性材料损伤破坏具有明显的优势。

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。

Peraluminous grarfites in Tibet occurred in a stage of collision between two continental crustal plates and the magma originated from anatexis of the upper crust.

喜马拉雅过铝花岗岩是陆内俯冲的岩石学记录，而冈底斯带过铝花岗岩更可能是特提斯洋壳北向俯冲的岩石学响应。

Anchor rod depth and space on different rock side slope of different gradient, based on the anchor rod

摘要围绕岩石边坡生态恢复技术，通过对锚杆受力情况的研究分析，确定了在不同岩石类型以及不同坡比的坡面上，其锚杆的最佳锚固深度和最佳锚固间距。

The former petrochemical and geochemical characteristics show that it is similar to island are tholeiitic rocks and andesite. It is comparable with the geochemical pattern of the typical island arc basalt in the world, indicating thatisland arc environment is dominnant in the diagenetic process.

其中前者岩石化学、地球化学特征表明，具类似于岛弧拉斑玄武岩及安山岩的特点，并与世界典型的岛弧玄武岩地球化学型式具可比性，反映出岩石在成岩过程中具育相当于岛弧环境为主的演化趋势。

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。

The anisotropism degree can be expressed by an anisotropism index which is the ratio between the point load strength indexes in the strongest and weakest directions.

岩石的各向异性程度可以用各向异性指数等于最强和最弱方向的点荷载强度指数之比，比值越大，岩石的各向异性愈明显。

Usually the archeozoic and Proterozoic eras are grouped together and referred to as Precambrian in age. Precambrian rocks have been intensely deformed, metamorphosed and intruded, and are relatively barren of fossil s.

通常太古代和元古代被归在一起而称作前寒武纪，前寒武纪的岩石多遭受强烈变形、变质或被岩浆岩侵入，岩石中缺少化石。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。