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Numerical Simulation on Air Permeability of Mining Protection Layer in Hongling Coal Mine
Author(s): 
Pages: 161-165,171
Year: Issue:  2
Journal: JOURNAL OF EARCH SCIENCES AND ENVIRONMENT

Keyword:  保护层煤岩透气性煤与瓦斯突出数值模拟;
Abstract: 以红菱煤矿保护层开采为工程实例,通过开采11#煤层,对存在煤与瓦斯突出的7#煤层和12#煤层进行卸压,利用FLAC3D数值模拟中小同步开挖的渗透率变化情况,对保护层开采过程中煤岩体的渗透性进行了分析,得出了煤岩体透气性变化规律.结果表明:煤岩体的透气性随着工作面推进不断增强;开采保护层上覆岩体的渗透率明显比底板岩体的渗透率大;卸压效果越好,渗透率越大.
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