top failure

Using this model,we have simulated the roof caving characteristic and the stress distribution of surrounding rocks and analyzed the deformation feature of the surrounding rocks in the working face end.

02D数值模拟软件建立相应的分析模型,模拟了煤层开采过程中的顶板垮落和围岩应力分布特征,重点分析了工作面上下端头的围岩应力分布规律及变形特点;结合具体生产矿井的综采工作面现场情况,得出了综采工作面推进过程中的周期来压、采动影响范围和煤壁片帮等矿压显现特征,并针对开采中出现的问题提出了相应的安全防范措施。

Similar simulated experiment for continuous mining and roof dilapidation of ore body underground;

矿体地下连续开采顶板崩落相似模拟试验

During the change of different fermentation types,the climax community was formed by all the ecological factors and a single factor could not make a population dominant even it is the optimal niche.

在生物制氢反应器中,研究了启动初期的容积负荷、pH和ORP对顶级群落形成的影响。

Roof breaking law along top-coal caving face

综放开采沿工作面倾向顶板垮落规律

The Theoretical Study on Cyclone Disaster Caused by Stope Roof Falling over Great Extent;

采场顶板大面积垮落的飓风灾害的理论研究

Research on Air Bumping Disaster Induced by Large Roof Falling in Goaf

采空区顶板大面积垮落的空气冲击灾害研究

Main roof first collapse law and measure of controlling roof in seam with approximate shallow depth

近浅埋煤层老顶初次垮落规律及控顶措施

Application of π type steel girder in broken easy caving roof

π型钢梁在破碎易冒落顶板中的应用

Mechanism of capping rock collapse by no-pillar sublevel caving

无底柱分段崩落法开采顶板围岩崩落机理

United we stand, divided we fall.

团结顶得住，分裂必垮台。

a molding at the corner between the ceiling and the top of a wall.

在天花板和一堵墙顶之间的角落里的塑造物。

Analysis of Roof Caving Instability Mechanism of Large-Section Roadway Under Complex Conditions

复杂条件下大断面巷道顶板冒落失稳分析

The roof had fallen down and the windows were broken.

屋顶己经垮下来了，窗户也破了。

Lift one edge of each skid strip with a putty knife and peel it from roof panel.

用油灰刀抬高防滑带的一边并且从车顶饰板上剥落它。

Study on Mechanism of Induced Caving Roof and Control of Its Secondary Catastrophe Chain Effect

顶板诱导崩落机理及次生灾变链式效应控制研究

Haines from the corner where he was knotting easily a scarf about the loose collar of his tennis shirt spoke:

海恩斯在角落里正松垮垮地往他的网球衫那宽松领口系领巾，他说：

The top surface in an enclosed space of a ship.

顶板密闭的船舱的顶层

Separate trim panel from roof panel.

从车顶板分离装饰板。

All beat her-because of her backwardness, because of her military backwardness, cultural backwardness, political backwardness, industrial backwardness, agricultural back wardness.

谁都能打垮它--因为它落后，军事落后，文化落后，政治落后，工业落后，农业落后。

A slab on the top of the capital of a column.

圆柱顶板圆柱柱顶上的背板

EStrengthen the management of roadway roof to reduce the roof accident

加强巷道顶板管理 减少顶板事故发生