查询词典 caving

Based on the observation data,the main load-bearing characteristics of hanging-sliding support s in a sublevel caving face are studied,and the adaptability of the supports is analyzed.

根据悬移支架放顶煤工作面支架阻力的实际观测数据，论述了放顶煤工作面悬移支架的主要受力特征，并对支架的适应性进行了分析。

Automation of fully mechanized sublevel caving working face could not only increase the mine's output, but also lighten workload and enhances work efficiency.

综放工作面自动化不但能够显著提高煤炭的产量，而且能够减轻劳动者的工作强度提高生产效率。

ABSTRACT Sublevel and block caving are extensively used in mining procedures. The emphasis was focused on the theoretical investigation of ore-drawing over a long period of time.

崩落采矿法是国内外金属矿山广泛应用的采矿方法，而放矿理论长时期是研究的重点，虽然有关的放矿理论很多，但矿岩移动规律还需进一步深入研究。

ABSTRACT Sublevel caving method is a high efficiency mining method for underground mine, it has many advantages, such as a simple mine stope, good work condition, high mechanization and low mining cost. Up to now, this method has been used in more than 85 percent of all underground iron mine.

无底柱分段崩落法是一种高效率的采矿方法，具有采场结构简单，作业条件好，机械化程度高，回采强度大，采矿成本低等优点，迄今应用该采矿方法采出的矿石量约占我国地下铁矿采出矿石总量的85％。

In a word, the use of the pressure test observation, similar simulations, numerical simulation, theoretical analysis, and other means, analyzed systematic to the behavior of superincumbent strata in mining 45 degree coal seams using horizontal section top-coal caving ,and it is for the 45 degree coal seams safe, high-yielding, and high efficiency production of research is of great significance.

综上所述，本文利用现场实测、相似模拟、数值模拟、理论分析等手段，较系统地对45°煤层水平分段综放开采后的上覆岩层移动破坏规律进行了分析，对于45°煤层安全高产高效生产的研究具有重要的意义。

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。

In this paper, the surface tension in four types of surfactant solutions, such as SAS, 1631, CAB-35 and JFCS in different concentrations were tested by using automatic surface tensiometer and the critical micelle concentration of each surfactant solution was determined which could be used as the mixing concentration of four types of surfactant solutions and the experiments of effective simulation of dust-settling by spraying them in fully mechanized caving face were carried out.

应用全自动表面张力仪对SAS、1631、CAB-35和JFCS 4种表面活性剂溶液不同浓度下的表面张力进行了测试，确定其临界胶束浓度，并以此浓度作为4种表面活性剂溶液的配比浓度；对4种表面活性剂溶液进行了综放工作面喷雾降尘有效性模拟实验，实验结果表明，所选取用4种表面活性剂溶液降尘效率均比清水有较大提高，对呼尘的降尘效率皆在90%以上；表面张力较小是选定综放工作表面活性剂溶液的重要标准，但非唯一标准。

In front of the disaster, does not say gives up, they use own life, composes a tune tune immortal ode: In the ruins, 29 year-old teacher opens Mia aircraft closely to hug two students, withstands caving in with the back the house beam, he is a vigorous tiercel, stretches out the double wing to resist the god of death for the student, perhaps his life had terminated in the flash, but loves with the belief, lets him maintain the such sacred posture.

灾难面前，不言放弃，他们用自己的生命，谱写出一曲曲不朽的颂歌：废墟中，29岁的老师张米亚紧紧抱着两名学生，用背顶住坍塌的房梁，他是一只矫健的雄鹰，伸出双翅为学生抵挡死神，或许他的生命在一瞬间就已终止，可是爱和信仰，让他保持着这样神圣的姿态。

In front of the disaster, does not say gives up, they use own life, composes a tune tune immortal ode: In the ruins, 29 year-old teacher opens Mia aircraft closely to hug two students, withstands caving in with the back the house beam, he is a vigorous tiercel, stretches out the double wing to resist the god of death for the student, perhaps his life had terminated in the flash , 8ttt8.com loves with the belief, lets him maintain the such sacred posture.

灾难面前，不言放弃，他们用自己的生命，谱写出一曲曲不朽的颂歌：废墟中，29岁的老师张米亚紧紧抱着两名学生，用背顶住坍塌的房梁，他是一只矫健的雄鹰，伸出双翅为学生抵挡死神，或许他的生命在一瞬间就已终止，可是爱和信仰，让他保持着这样神圣的姿态。

The human is so tiny, is containing the formidable strength actually.in front of the disaster, does not say gives up, they use own life, composes a tune tune immortal ode: in the ruins, 29 year-old teacher opens mia aircraft closely to hug two students, withstands caving in with the back the house beam, he is a vigorous tiercel, stretches out the double wing to resist the god of death for the student, perhaps his life had terminated in the flash, but loves with the belief, lets him maintain the such sacred posture.also has huaiyuan middle school's teacher wu zhonghong, he luckily is already out of danger, but in order to is stranded in the classroom however the student, mr.

人是如此渺小，却又蕴含着强大的力量。灾难面前，不言放弃，他们用自己的生命，谱写出一曲曲不朽的颂歌：废墟中，29岁的老师张米亚紧紧抱着两名学生，用背顶住坍塌的房梁，他是一只矫健的雄鹰，伸出双翅为学生抵挡死神，或许他的生命在一瞬间就已终止，可是爱和信仰，让他保持着这样神圣的姿态。

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。