瓦斯喷出特点及防治--qsf999的安全生产小屋

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瓦斯喷出特点及防治 | 2011-7-30 10:51:00

瓦斯喷出特点及防治

     所谓瓦斯喷出就是大量瓦斯在压力状态下，从煤岩裂缝中喷出，包括短时间的喷出和长时间的喷出。
    瓦斯喷出有如下特点：
    （1）瓦斯喷出按其成因分为两类：瓦斯喷出与地质构造有密切的关系。瓦斯喷出一般发生于能贮存瓦斯的地质构造破坏带，如断层、断裂、招曲和石灰岩溶洞附近。另一类发生于煤层顶（底）板、围岩分层断裂的回采工作面，如围岩内赋存含瓦斯的煤层或夹层的情况下，当煤层回采后，围岩形成空洞，邻近层的瓦斯有可能转移到这些空洞内，瓦斯量和瓦斯压力逐渐增加，能突破层间围岩喷向采空区，同时，工作面的瓦斯涌出量也随之增加。
    （2）瓦斯喷出前常有预兆，如风流中的瓦斯浓度增加或忽大忽小，以及有发凉的感觉或有嘶嘶的喷出声响，顶底板来压的轰鸣声，煤层变湿、变软等现象。
    （3）瓦斯的喷出量和持继时间：决定于积存的瓦斯量和瓦斯压力，从几立方米到几十万立方米，从几分钟到几年，甚至十几年，它与积蓄的瓦斯量、溶洞和裂隙区大小和来源的范围等有密切的联系。
    预防与处理瓦斯喷出的措施，根据一些矿井的经验总结为“探、排、引、堵”。“探”就是探明地质构造和瓦斯情况；“排”就是排放或抽放瓦斯；“引”就是把瓦斯引至总回风流或工作面后2 0米以外的区域；“堵”就是将裂隙、裂缝等堵住，不让瓦斯喷出，具体处理措施还应根据瓦斯喷出量和瓦斯压力大小等具体情况进行处理。

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Re:在漫画中识别身边的违章 | 2017-2-20 16:02:05

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Re:在漫画中识别身边的违章 | 2017-2-19 23:25:19

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Re:在漫画中识别身边的违章 | 2016-10-17 6:30:08

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Re:在漫画中识别身边的违章 | 2016-10-16 8:27:57

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Re:在漫画中识别身边的违章 | 2016-10-13 16:15:38

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Re:在漫画中识别身边的违章 | 2016-10-10 3:44:59

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原创 | 2016-9-30 16:06:00

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