查询词典 caving

In order to study basic roof's destruction movement that affects working face in horizontal section top coal caving in mining steep seams, this paper analyses tension of roof using elastic and thin board theory and concludes criterion of roof destruction based on long and narrow thin board.

摘要为研究急斜煤层水平分段放顶煤开采过程中基本顶破坏活动对工作面的影响，根据急斜煤层基本顶具有倾斜狭长板的特点，运用弹性薄板理论对基本顶岩层进行了拉应力分析，得出了顶板破断的判别准则，建立了基本顶初次破断后形成的&铰接结构&的力学模型。

Such as adaptation to the hard seam roof conditions resistance to a strong frame, adapted to the big mining thick coal seam mining height and caving hydraulic support, adapted to thin seam mining and steep seam mining and other special stent.

如适应于坚硬煤层顶板条件的商阻力强力支架，适应于厚煤层开采的大采高和放顶煤液压支架，适应于薄煤层开采和急倾斜煤层开采的特种支架等。

Behind the scenes, too, the pure president was caving in to the allurements of his job.

纯洁 的总统也没能完全扛住职位带来的诱惑。

It is known that exact calculation of formation pressure is significant not only for the proper and costeffective selection of drilling fluid properties, but for the prevention of drilling problems like blowouts, lost circulations and well caving.

地层压力的准确计算对于合理、经济地选用钻井液性能，防止井喷、井漏、井塌等复杂钻井情况的发生具有重要意义。

In the paper,fully-mechanized sub-level caving at home and abroad is systematically summarized,it is presented that how to increase cavability of hard roof coal is main technology difficult problem to be faced.

在国内外综放开采技术系统总结的基础上，提出了特厚坚硬煤层综放开采所面临的主要技术难题就是如何提高坚硬顶煤的冒放性。

It is practically proved that the scheme can meet the need of the production in full mechanized caving method in hard coal seam.

通过实践证明，该方案满足了在坚硬厚煤层综放开采中成功进行顶煤预破碎的需要

After analyzing fully-mechanized sub-level caving technology in the case of special thick and hard coal seam, it is presented that the increment of cavability of hard roof coal and available control of gas are the main difficult technology problem to be faced.

通过对特厚坚硬煤层综放开采技术的系统分析，指出提高坚硬顶煤的冒放性和瓦斯的综合治理是该条件下综放开采所面临的主要技术难题。

Amongst the most outrages things I have done in adventure races was to abseil 2 rope length (that's almost 200meters) in the middle of the heavy downpour looking over the Kinta Valley, Flying Fox inside Gua Kandu at breakneck speed, river boarding down Sungai Kinta with class 3 rapids and hoping no monitor lizards would come nibbling your toes, caving in total darkness and submerging 90% inside the cave's river system to get to the other side.

其中最暴行，我在冒险的比赛做的事情是绕绳下降2绳的长度（即几乎二○○米在倾盆大雨中）偷看卦Kandu在近打谷，飞狐以惊人的速度，河登机双溪近打下来的第3类急流，希望没有巨蜥会来蚕食你的脚趾，在完全黑暗的洞穴探险和淹没洞内的水系90％到达对方。

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。