roof stability

On the premise of the stability of roof and top coal, the displacement regularity of surrounding rock must be rationally used to determine the reasonable filling pattern and filling strength in order to ensure the filling stability and a good result of retaining roadway.

当采用综放沿空留巷时，在保证顶煤及顶板稳定前提下，合理利用围岩移动规律，确定合理充填方式和充填体强度，就能保证充填体稳定，达到很好的留巷效果。

Roof stability is influenced by the multi-factor.

溶洞顶板稳定与否是多方面因素综合影响的结果.

Local Stability Calculation of KJ Columns Welded at Roof of Stack Shell

高炉炉壳顶部KJ柱区局部稳定性的研究

Influence of Geological Conditions on Roof Stability at Coal Face

地质条件对回采工作面顶板稳定性的影响

Study on relationship between roof stability and top coal's recovery ratio

顶板结构稳定性与顶煤放出率关系探讨

From the control angle of roof stability in face area, UDEC program has been used in analysis of the relationship between the roof stability in face area, the working resistance of support and the distance to face under different top coal conditions.

从端面顶板稳定性控制角度出发，应用数值模拟离散元法分析了不同顶煤条件下端面顶板稳定性与支架工作阻力及端面距的关系。

Analyses the migration mechanism of overlying formation of fore-and-aft mining, and the stability influence of roof-floor rock, gains the stress distribution of plastically deforming area form the elasto-plastic stability of coal pillar.

分析了采动影响前后巷道上覆岩层运动、掘巷前后巷道顶底板的岩层及煤柱稳定性；由煤柱的弹塑性稳定性分析中，得出煤柱塑性区应力分布；

Based on the research result of control action of structure to the stability of roof, the author puts out tectonic synthesis method for predicting the stability of roof.

根据地质构造因素控制煤层顶板稳定性作用的研究，提出煤层顶板稳定性预测评价的矿井地质构造特征解析方法。

Pre-tensioned bolts support is an effective way to improve joint roof stability.

预应力锚杆支护,是提高煤巷节理顶板稳定性的有效方法.

An analysis of the geomechanical factors influencing coal mine roof stability in Appalachia

影响阿巴拉契亚煤矿顶板稳定性的地质力学因素分析

The Litho logy and combination of coal roof are determined by the changes of sedimentary environment. Different sedimentary environment have different coal seam roof stability.

煤层顶板的岩性及组合是由沉积环境变化所决定的，沉积环境不同会造成煤层顶板稳定性的明显差异。

With the two great roof-fall accident of Pingyi gypsum mine, this paper analyzes the stability of pillars and roof system and the mechanism of destruction of pillars and roof.

本文以平邑石膏矿两次大的冒顶事故为资料背景，分析了矿柱、顶板系统的破坏机理。

Research on the tectonic synthesis method of prediction roof stability and its application

煤层顶板稳定性预测构造解析法研究与应用