roof caving的例句大全

Cause Analysis on Askew of Light Roof Caving Support

轻型放顶煤支架歪架原因分析

With the roof caving in, there were an increasing number of desertions.

由于大势已去, 逃兵的人数日益增多.

Simultaneously, the gas control in roof caving and fully mechanized mining is the unsubstantial aspect of prevention measures for gas disasters in all over the world.

同时，放顶煤综采工作面的瓦斯治理也是世界各国煤矿瓦斯灾害防治技术的薄弱环节。

The design of light-duty roof caving coal hydraulic support equipped with flat tramcar

轻型放顶煤液压支架配套平板车设计

Analysis of Complex Roof Caving Process in Mining by Caving Method

崩落法开采时复杂顶板的崩落过程分析

Technology and control of first roof caving in coal working face

采煤工作面初次放顶的技术与管理

The fracture of overlying key stratum results in decrease of the roof caving angle and the increase of periodic caving span and weighting intensity.

覆岩关键层的破断使工作面顶板垮落角减小、周期垮落步距和来压强度都增大。

Roof caving is one of the most serious engineering disasters in underground mining activities of metal mines. It not only delays the progress of production, but also threats against underground workers.

顶板垮落是金属矿山地下开采中严重的工程灾害之一，它不仅影响采矿进度，同时也对井下作业人员生命安全构成威胁。

Mining disasters such as sliding, subsidence and roof caving are the results of mutation of complex systematic behaviors. Their formation mechanism, spatiotemporal evolvement law and mutual relation are very complex.

滑坡、塌陷与冒顶等矿山灾害是复杂地质系统行为突变的结果，其形成机制、时空演变规律及相互间的关系都十分复杂。

Dedusting mechanism by water-cloud of wetting agents and the relevant tests for fully-mechanized and roof caving coal face Don't put the unit in extremely hot or moist place.

综放工作面湿润剂喷雾降尘机理及高效降尘湿润剂的试验不要把话机故意放到温度高的或潮湿的地方。

The abrupt change model and critical conditions can be used for describing various phenomena observed before and after roof falling in large area, and provide the theoretic basis to select suitable method for forced caving of difficult-to-cave roofs.

所得到的突变模型和临界条件，可以描述顶板大面积冒落前后所观察到的各种现象，并可为对难冒顶板进行强制放顶的方法提供理论依据。

IMPROVEMENT OF TOP SLICING MINING TECHNIQUE ADOPTED FOR NO. 715 URANIUM MINE ( 3) longwall pillar working with caving and roof propping with hydraulic props.

七一五矿分层崩落法回采技术的改进③液压支柱护顶长壁式崩落法回采水平矿柱。

Function of destruction and instability of basic roof in top coal caving of steep seams

基本顶破断失稳在急斜煤层放顶煤开采中的作用

Simulation testing and theoretical analysis were made to study generating mechanics and moving evolutionary process of "granular arch" structure of upper immediate roof in top coal caving.

通过相似模拟实验和理论分析，研究了综放条件下上位直接顶“散体拱”结构的形成机理和移动演化过程。

Research on caving structure of hard roof and hard top coal in seam using fully mechanized mining with sublevel caving

两硬综放面顶煤顶板冒放结构探讨

It is pointed out that the law of main roof beak in top caving in steep and thick seam initially occur at the middle of exposed main roof surface and expand along the face advancing direction which is different from it in gently inclined coal seam.

指出急斜特厚煤层放顶煤开采顶板破断不同于缓倾斜煤层顶板破坏规律，破坏首先在顶板裸露面中部开始，沿工作面推进方向发展。

Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face tap ( ping) drill

综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究

the simulation on the laws of top-coal and roof movement in suspensive-advancing support caving mining in flat-dipping thick seam

缓倾斜厚煤层悬移支架放顶煤顶板活动规律模拟试验研究

the analysis on roof control of working face of medium-thickness coal seam comprehensive mechanized top coal caving method

中厚煤层综采放顶煤工作面顶板管理

mining horizontal pillars with hydraulic roof propping in longwall caving method

在长壁式崩落法中用液压支柱护顶回采水平矿柱