分析了炮采工作面顶板事故的类型及产生原因，提出了预防措施。
Analyzing the accident of the type and reason in blast mining top-coal face, and preventative measures are provided.
通过工程实例分析，验证了离层型顶板事故发生的临界离层面积预警判据的准确性。
Through the engineering example analysis, the accuracy of Smax warning criterion for separation type roof accident is verified.
控制顶板事故，防范冲击矿压的发生是开采埋深较大的孤岛煤柱工作面的重点和难点。
Controlling roof accidents and preventing the occurrence of bursting underground pressure are the priorities and difficulties to mine deeper isolated pillar face.
然而，这些事故中最为经常发生的是顶板事故——占到整个煤矿事故的百分之六七十左右。
However, these accidents are most often is the roof accident — the whole coal mine accidents accounted for about sixty or seventy percent.
该文通过事故案例分析，提出了炮采放顶煤工作面顶板控制的基本要求和预防顶板事故发生的有效措施，有一定借鉴意义。
The case of accidents, the proposed blasting mining roof caving face the basic requirements for control and prevention of incidents of roof effective measures, must learn.
运用系统分析方法从人、机、环境、管理四个要素出发给出瓦斯、水、火、煤尘、顶板五种煤矿典型事故的事故树图。
Gas, water, fire, dust, coal mine roof five kinds of typical accident fault tree diagram have been given by use of systems analysis from human, machine, environment, and management four elements.
在该部位顶板模板施工中成功应用了碗扣式钢管脚手架支撑体系，整个施工过程中未出现任何安全及质量事故。
Cuplock scaffold bracing system was successfully used in those locations, and no any safety or quality accident took place in the whole process of construction.
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。
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.
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。
The compound roof fall accident of the individual hydraulic prop face is analyzed. The accident mechanization and prevention method are pointed.
数值分析结果表明：夹沟矿采空区的顶板是不稳定的，顶板岩体容易发生垮落事故。
The results of numerical analysis on mined-out area indicate that the roof at mined-out areas is unstable and the rock in the roof is easy to collapse in this mine.
数值分析结果表明：夹沟矿采空区的顶板是不稳定的，顶板岩体容易发生垮落事故。
The results of numerical analysis on mined-out area indicate that the roof at mined-out areas is unstable and the rock in the roof is easy to collapse in this mine.
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