井下采空区大面积冒顶的预兆有哪些现象--qsf999的安全生产小屋

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井下采空区大面积冒顶的预兆有哪些现象 | 2011-9-11 15:40:00

井下采空区大面积冒顶的预兆有哪些现象

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。

By:qsf999 | 阅读全文 | 回复(17) | 引用通告 | 编辑

Re:在漫画中识别身边的违章 | 2017-2-20 18:51:40

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Re:在漫画中识别身边的违章 | 2016-10-17 13:56:15

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Re:在漫画中识别身边的违章 | 2016-10-16 16:57:47

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Re:在漫画中识别身边的违章 | 2016-10-15 22:43:56

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Re:在漫画中识别身边的违章 | 2016-10-15 22:12:00

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Re:在漫画中识别身边的违章 | 2016-10-11 1:26:47

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By:cbrsw(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

原创 | 2016-9-30 10:36:07

http://njryw168.lofter.com/post/1e6983e5_c7eee92 http://rywydx.lofter.com/post/1e6a68e3_c80ce8b http://rywkdks.lofter.com/post/1e698063_c7f75e8 http://rywkdks.lofter.com/post/1e698063_c7f5106 http://rywydx.lofter.com/post/1e6a68e3_c80f5be http://rywkdks.lofter.com/post/1e698063_c7f4538 http://rywywj.lofter.com/post/1e6a80c3_c824268 http://rywkdks.lofter.com/post/1e698063_c7f45a5 http://rywkdks.lofter.com/post/1e698063_c7f9f5e http://rywydx.lofter.com/post/1e6a68e3_c80cc74

By:原创(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

原创 | 2016-9-28 16:00:59

http://ywjseo.lofter.com/post/1e634752_c652e0b http://bjseoywj.lofter.com/post/1e66bf3e_c7074c7 http://seogsywj.lofter.com/post/1e634756_c6dde7e http://seogsywj.lofter.com/post/1e634756_c6de796 http://wztgywj.lofter.com/post/1e65f473_c6ed3e5 http://wztgywj.lofter.com/post/1e65f473_c6ef48b http://bjseoywj.lofter.com/post/1e66bf3e_c70f5c3 http://ywjseo.lofter.com/post/1e634752_c650d41 http://bjseoywj.lofter.com/post/1e66bf3e_c710418 http://wztgywj.lofter.com/post/1e65f473_c6ea0c1

By:原创(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

原创 | 2016-9-6 16:27:31

http://rywhw.lofter.com/post/1e5a84f4_c3d7ee0 http://rywhw.lofter.com/post/1e5a84f4_c3d7edf http://rywhw.lofter.com/post/1e5a84f4_c3d7ede http://rywhw.lofter.com/post/1e5a84f4_c3d7edd http://rywhw.lofter.com/post/1e5a84f4_c3d7edc http://rywhw.lofter.com/post/1e5a84f4_c3d7edb http://rywhw.lofter.com/post/1e5a84f4_c3d7eda http://rywhw.lofter.com/post/1e5a84f4_c3d7ed9 http://rywhw.lofter.com/post/1e5a84f4_c3d7ed8 http://rywhw.lofter.com/post/1e5a84f4_c3d7ed7

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