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。
In this paper, the basic formula and changing rule are presented according to the loading course, the failing mechanism and the relative formula of eccentric reinforced concrete structural member.
本文从钢筋混凝土偏心受压构件的受力过程，破坏机理及由此所建立的基本公式出发，进行了一系列推导，最终求得偏压构件的经济配筋率的一般表达式及其变化规律。
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