井巷支护及维护--qsf999的安全生产小屋

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井巷支护及维护 | 2011-8-5 10:32:00

井巷支护及维护

井巷掘进出空间后，一般都要进行临时支护或永久支护，以防止围岩的破坏。井巷支护的方式主要有以下几种：

1．锚杆支护与锚喷支护

（1)锚杆支护。锚杆支护是单独采用锚杆的支护。掘进后即向巷道围岩钻孔，然后向孔中安装锚杆，必要时也可安装锚索，如在大断面巷道或铜室支护时，目的是使锚杆和锚索与围岩共同作用进行巷道支护。锚杆支护的作用机理有多种：悬吊作用、组合梁作用及挤压连接、加固拱作用和松动圈支护理论等。

（2）锚喷支护。锚喷支护又称喷锚支护，是联合使用锚杆和喷射混凝土或喷浆的支护。从广义上讲可以将除锚杆支护以外的其他与锚杆联合的支护形式都纳人此范围。如喷浆支护、喷混凝土支护、锚网支护、锚喷网支护、锚梁网（喷）支护以及锚索支护等。

2.混凝土及钢筋混凝土支护

混凝土支护是用预制混凝土块或浇筑混凝土砌筑的支架所进行的支护。钢筋混凝土支护是用预制的钢筋混凝土构件或浇筑的钢筋混凝土砌筑的支架所进行的支护。这两种支护是立井井筒、运输大巷及井底车场所采用的主要支护方式。

3.棚状支架

棚状支架根据材质不同可以分为木支架和金属支架

By:qsf999 | 阅读全文 | 回复(15) | 引用通告 | 编辑

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Re:在漫画中识别身边的违章 | 2017-2-19 22:26:04

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Re:在漫画中识别身边的违章 | 2016-10-22 22:43:40

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Re:在漫画中识别身边的违章 | 2016-10-22 21:15:35

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Re:在漫画中识别身边的违章 | 2016-10-21 15:35:59

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Re:在漫画中识别身边的违章 | 2016-10-20 22:58:15

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Re:在漫画中识别身边的违章 | 2016-10-17 8:00:38

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Re:在漫画中识别身边的违章 | 2016-10-11 7:42:34

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Re:在漫画中识别身边的违章 | 2016-10-11 3:15:46

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原创 | 2016-9-30 16:05:19

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原创 | 2016-9-6 21:47:36

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