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。

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Roof fall accident is one kind of dangerous accidents happened at underground mines and underground pressure management is the main task of mining safety management.

冒顶片帮事故是地下矿山危害最为严重的事故，矿山地压管理是地下开采矿山安全管理的重要任务。

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The compound roof fall accident of the individual hydraulic prop face is analyzed. The accident mechanization and prevention method are pointed.

对单体支柱工作面复合型顶板推垮型事故进行了分析，提出了事故发生的机理和预防办法。

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