利用乌兰井田勘探和生产揭露的资料，分析研究了乌兰井田地质构造和煤体结构特征。
From exploration and production information revealed in Ulan minefield, the paper analyzed geological structure and coal texture of the minefield.
根据护巷岩(煤)柱的结构特征，提出了几何弱结构巷道与弱结构体的概念。
According to structure character of rock (coal) pillar of maintaining roadways, concepts of weak geometry structure roadways and weak structure body are brought forward in this paper.
并提出了顶煤体中“跨层拱”结构的力学模型，指出了影响结构特征的相关因素。
The paper provided the mechanics model of the multi strata arch structure in the top coal and pointed the related factors of the influence structure features.
煤巷顶板多数是岩体强度较低的沉积岩，层状岩体结构是沉积岩的主要特征之一。
Most rock roof of roadway is sediment rock, so its intensity is low, the stratification is a common rock mass structure in coal mines.
通过对顺槽煤柱破坏失稳机理及煤柱上覆岩体的结构特征、垮落失稳机理的分析，提出了合理煤柱宽度的计算公式。
Through analyze the failure mechanism and structural feature of mine pillar and upside rock, the reasonable virgin coal width formula has been obtained.
通过对顺槽煤柱破坏失稳机理及煤柱上覆岩体的结构特征、垮落失稳机理的分析，提出了合理煤柱宽度的计算公式。
Through analyze the failure mechanism and structural feature of mine pillar and upside rock, the reasonable virgin coal width formula has been obtained.
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