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The roof of cavern is regarded as an elastic beam with support at the midpoint and the coal pillars are regarded as bearings so as to establishing a cavern roof-coal pillar system.
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释义
摘要将顶板视为中点有支承的弹性固结梁,将煤柱视为支座,形成了顶板-煤柱系统。
以上内容独家创作,受著作权保护,侵权必究
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