姜家钰;雷东记;谢向向;张大伟;

• 1:河南理工大学河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地
• 2:中原经济区煤层(页岩)气河南省协同创新中心

摘要(Abstract)：

利用压汞法、低温氮吸附法、瓦斯等温吸附和解吸试验对平煤八矿构造煤和共生原生结构煤进行综合分析,探讨了构造煤孔隙结构与瓦斯耦合特性。结果表明,构造煤以微孔为主,中孔和大孔相对发育且含较多细颈瓶孔,孔隙连通性差。与共生原生结构煤相比,构造煤各孔径阶段的孔容和孔比表面积都有所增加。构造煤比表面积的增加具有阶段性,即孔径<1.2 nm时为慢增加阶段,孔径=1.2⁴.9nm时为快增加阶段,孔径>4.9 nm时为稳定阶段。构造煤极限瓦斯吸附量a的增大与比表面积快增加阶段关系密切,但小于其BET比表面积的增幅。瓦斯解吸初期04.9nm时为快增加阶段,孔径>4.9 nm时为稳定阶段。构造煤极限瓦斯吸附量a的增大与比表面积快增加阶段关系密切,但小于其BET比表面积的增幅。瓦斯解吸初期0² min内构造煤瓦斯解吸速度和解吸量明显大于共生原生结构煤,与中孔和大孔的变化一致,2 min以后瓦斯解吸迅速衰减。低煤体强度、高瓦斯含量的构造煤以气-煤共溶体形式储集更多弹性潜能,突然卸压时瓦斯膨胀能迅速释放,煤层中发育的构造煤增加了煤与瓦斯突出的危险性。

关键词(KeyWords)： 安全工程;构造煤;孔隙结构;吸附;解吸;煤与瓦斯突出

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”科技重大专项(2011ZX05040-005);; 河南省高校科技创新团队支持计划项目(14IRTSTHN002);; 河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地外部开放基金项目(WS2013A11);; 河南省教育厅科学技术重点研究项目(14A440008)

作者(Authors): 姜家钰;雷东记;谢向向;张大伟;

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