井下采空区大面积冒顶的预兆有哪些现象--杨远锋的博客

井下采空区大面积冒顶的预兆有哪些现象

[ 2011-1-9 9:28:00 | By: 杨远锋 ]

当井下采空区面积很大，矿柱密度偏小，尺寸偏小时，容易发生大面积冒顶事故。

　　冒顶预兆有下列现象：

　　（1）矿柱发生劈裂破坏现象，且破坏呈加速的情况。

　　（2）支架发出爆裂声，开始折断。

　　（3）顶板岩石发出破裂、撞击声。

　　（4）顶板有岩石碎块掉落。

　　（5）涌水、淋水增大。

当发现有透水、大面积冒顶预兆时,应立即停止作业，马上撤离作业区内的人员，并立即上报。

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原创

[ 2016-9-6 17:19:58 | By: 原创(游客) ]

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原创

[ 2016-9-28 16:54:12 | By: 原创(游客) ]

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原创

[ 2016-9-30 11:31:04 | By: 原创(游客) ]

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Re:在漫画中识别身边的违章

[ 2016-10-11 17:50:16 | By: yizdg(游客) ]

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Re:在漫画中识别身边的违章

[ 2016-10-13 2:54:35 | By: ushlp(游客) ]

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Re:在漫画中识别身边的违章

[ 2016-10-14 4:00:03 | By: hskmp(游客) ]

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Re:在漫画中识别身边的违章

[ 2016-10-19 23:52:08 | By: coegk(游客) ]

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Re:在漫画中识别身边的违章

[ 2016-10-20 16:24:11 | By: ljycg(游客) ]

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Re:在漫画中识别身边的违章

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Re:在漫画中识别身边的违章

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Re:在漫画中识别身边的违章

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Re:在漫画中识别身边的违章

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Re:在漫画中识别身边的违章

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