Classification and Judgment Method of the Protective Layers
Classification and Judgment Method of the Protective Layers
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发表时间：
2010
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通讯作者：
Zhang Zhi-peng
中科院分区：
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作者：
Zhang Zhi-peng
开采保护层并对保护层进行卸压瓦斯抽放是消除煤与瓦斯突出最有效、最经济的区域性方法之一，本文根据保护层与被保护层的等效相对间距对保护层进行了分类，考虑保护层工作面的赋存条件、开采参数和覆岩中坚硬岩石的涌出，通过对保护层开挖机理及影响因素的分析，将下保护层分为近距离层、远距离层和超远距离层;将上保护层也分为近距离层和远距离层，根据天府磨心坡煤矿急倾斜煤层和阳泉新井煤矿平煤层的地质构造，采用分层判别法，通过分类对比和现场实践表明，该保护层分类判别方法能正确判别保护层类型。
The exploitation of protective layer and pressure-relief gas drainage for the protected layer is one of the most effective and economical regional methods to eliminate coal and gas outburst.In this paper,the protective layer was classified by the equivalent relative interval between the protective layer and the protected layer,considering the occurrence condition and mining parameters of the protective layer working face and the effluence of hard rock in the overburden,through analyzing the mechanism and influencing factors of the protective layer excavation.The under protective layer is classified into close distance layer,remote distance layer,and super-remote layer;the upper protective layer is also classified into close distance layer and remote distance layer.Then the classification and judgment method of the protective layer was used based on the geological structure of steep seam in Tianfu Moxinpo coal mine and the flat seam in Yangquan Xinjing coal mine.The comparison of the classification and field practice indicates that the classification and judgment method of the protective layer can correctly judge the type of the protective layer.