覆层

The earth's surface subsidence is one of the disasters caused by coal exploitation.

矿山开采过程中引起的地表沉陷，为了解决这一问题对覆岩离层的产生机理进行了研究。

In Harbor Engineering, it is often the case that subsoil consists of layered soils.

在深水码头、防浪堤等大型港口工程建设中常常会遇到构筑物下覆地基由非均质的层状土构成的情况。

Detailed researches are implemented to behavior of superincumbent strata in mining 45 degree coal seams using horizontal section top-coal caving in this paper.

本文针对45°特厚煤层水平分段放顶煤开采后的上覆岩层移动破坏规律进行了深入研究，指出45°特厚煤层开采后老顶破断后在一定层位形成了沿倾斜方向的铰接岩梁结构，即倾斜岩梁。

Fan synclinorium is their middle part. Huainan ramp fault-fold structural belt is the main body of Huaina coalfield, is an important part of foreland deformation belt in northern Dabieshan orogenic belt, it includes the thrust frond and autochthone of dabieshan deformation in its northern.

淮南对冲式断－褶构造带是印支期华北板块与扬子板块碰撞造山的产物，是大别山北侧薄皮推覆构造前锋带和外缘带的主体，主要沿结晶基底与盖层的接触界面滑动。

The paper combines investigative mode of theory analysis and numerical simulation analysis, based on elastic and plastic theory, explaining the relation of stress fields and stress- transmogrification. Then citing key stratum theory, the paper analyzing the moving rule of the stratum above the laneway along the gob, gaining some disciplinary cognition.

论文采用理论分析与数值计算模拟分析相结合的研究方式，根据弹塑性理论求解了巷道围岩的应力场及应力变形关系；进而引用关键层理论，对深井综放开采沿空巷道的上覆岩层运动规律进行分析，获得了一些规律性认识。

This paper studies the microencapsulation of particles of ultramarine pigment by an acid resistant clorless shell. The surface of the particle is covered and this gives the ultramarine pigment acid resistance.

对群青颜料粒子进行了微胶囊化研究，在其表面包覆一层无色耐酸壳膜，使其具有耐酸性，分析了影响胶囊化群青的耐酸性及色差的各种因素。

On the base of large quantitative test, using coal petrography and organic geochemical data, the source of oil and gas in the coal-measures is analyzed. And it is concluded that the area's Yan'an group coal-bed has a low potential of oil production, and the oil and gas contained in the coal-measures and superjacent strata comes from underlying Upper Triassic Yanchang group strata. After a series of parameters of coal seam and surrounding rocks are tested, gas formation, storage, preservation, permeability of the coal-rock seam are analyzed and evaluated.

本文在大量测试工作基础上，利用煤岩学与有机地球化学资料，分析了煤系油气的来源，认为本区延安组煤系煤层生油潜力差，煤系及其上覆地层所含油气为下伏上三叠统延长组源岩所生，油气主要通过迭置的砂体、不整合面、构造裂缝等自下向上运移进入煤系；通过对煤层及围岩一系列物性参数的测试，分析与评价了煤岩层的生、储、盖、渗性能与可抽放性，得出主采4_(-2)号煤层属中等储集、低渗透层，围岩封闭性差，渗透性高，煤层瓦斯含量低，而顶板砂岩瓦斯含量高，为采面瓦斯涌出的主要来源。

We use Poly vinyl alcohol, acrylic acid and acrylonitrile as the materials, through the aldolisation of PVA and copolymerization of AA and AN, we prepared the composite membrane with balance theory of hydrophilic and hydrophobic water.

本文以聚乙烯醇和丙烯酸、丙烯腈为主要原料，通过PVA缩醛中醛的选择及膜制备方法的选择，根据亲憎水平衡理论设计出PVA缩甲醛膜上下两层包覆AA和AN共聚膜的复合膜，用此膜进行甲醇／水溶液的渗透汽化分离。

The simulation test of determining the viscous resistance of the sucker rod with Ni-P-PTFE plating is conducted. The test result shows that the viscous resistance of Ni-P-PTFE plated rod in polymer solution is 20% less than that of the Ni-P plated rod, and the compound layer has better wear- and corrosion-resistance. There...

测定粘滞阻力的现场模拟实验表明，镀覆Ni P PTFE的仿抽油杆比常规镀Ni P的仿抽油杆在聚合物溶液中所受的粘滞阻力约小 2 0 %，且复合镀层具有优良的耐磨和耐蚀性，因此这种工艺对减少抽油杆磨损断裂事故，延长使用寿命具有重大意义

To have a good weldability, copper wire because of its coated with a layer of pure copper.

具有良好的焊接性，铜包铝线由于其表面包覆了一层纯铜，因此具有跟随纯铜线一样的可焊性。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失