The long shallow slope on the main roof at the entrance is inspired by the angle of repose of the local soil.
入口主屋顶上长长的斜坡受到当地土壤的自然倾角的启发。
The main roof has three basic structure forms: dynamic arch, arch-beam and beam.
老顶存在三种基本结构：类拱式、拱梁式和梁式。
The intervals of main roof weighting at work faces were predicted by using artificial neural network.
利用人工神经元网络对工作面的顶板来压步距进行了预测。
The balance structure of main roof and its action to immediate roof in large cutting height workface;
本文分析了顶板运动对冲击矿压的作用，采用“砌体梁”理论研究了断层倾向对顶板平衡结构的影响。
The paper describes the time effect characteristics of main roof deformation and its viscoelastic solution.
本文详细论述了采场老顶变形的时效特性及其粘弹性解。
The paper regards the main roof strata in uphill and downhill mining of an inclined longwall as a elastic plate.
本文将倾斜长壁仰斜、俯斜开采的老顶岩层视为倾斜弹性板。
At last, the effectiveness of the proposed method is verified by the wind-induced vibration of National Stadium main roof.
最后，通过国家体育场屋盖主结构的风振响应分析对所提出方法的有效性进行了验证。
This veranda is planted with greenery and visually continues onto the main roof with a green lawn that wraps over the roof forms.
种满绿植的阳台，视觉上延续了草皮包裹的主要屋顶。
By field observation and simulating test of shallow seam longwall mining, the phenomenon of main roof asymmetry breaking is discovered during the first weighting.
依据典型浅埋煤层工作面的实测和模拟，发现了采场老顶初次破断的非对称现象。
Based on simulating model test and theoretical analysis, the mechanism of main roof first breaking is revealed, and the asymmetry breaking parameter is determined.
运用相似模拟和理论分析相结合的方法，揭示了采场顶板初次破断机理，确定了有关参数。
Based on field observations and theoretical analyses, the characteristic of periodic caving of immediate roof and main roof in a room and pillar system was analyzed.
通过理论分析和现场实测，对房柱式采煤的矿压显现规律及其特点进行了探讨。
The movement and breakage of top coal, especially its internal micro-fracture extension, are closely related to the movement regularity of its immediate roof and main roof.
顶煤的运移与垮落，尤其是内部微观裂隙的扩展，与其直接顶和老顶岩层的活动规律密切相关。
First, based on similar material model test, top coal cave-in characters in steep and thick seam were studied as well as failure law of main roof and features of surface subsiding.
首先利用相似模拟实验研究了急斜特厚煤层顶煤的冒落特征、顶板的破坏规律，以及地表下沉的特点。
Based on the local, migratory and subsection characteristics of main roof fall of longwall face, the main roof was divided into some plate group, and plate group mechanical model was established.
针对长壁工作面顶板垮落具有局部、分段、迁移的时空特征，将长壁工作面采场顶板划分成若干个相互铰接的薄板，建立了薄板组力学模型。
The results show that there are great differences in the stress of roadway surrounding rock, and the stress and strain in coal pillar while the fracture line of main roof locates in different places.
研究表明，基本顶断裂线位于不同位置时，巷道围岩应力、煤柱应力及应变差异较大。
The results show that there are great differences in the stress of roadway surrounding rock, and the stress and strain in coal pillar while the fracture line of main roof locates in different places.
研究表明，基本顶断裂线位于不同位置时，巷道围岩应力、煤柱应力及应变差异较大。
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