侯世辉,王小明,李丹阳,党正

• 1:井冈山大学岩土工程实验室
• 2:中国地质大学(武汉)构造与油气资源教育部重点实验室

摘要(Abstract)：

为分析不同粒度构造煤的孔分形特征，采集河南省平顶山煤田东部十矿构造煤样品，破碎筛分成不同的粒度区间：1.0～0.5 mm、0.50～0.25 mm、0.25～0.15 mm、0.15～0.09 mm、0.09～0.075 mm，进行低压N_2吸附测试。根据分形FHH理论，通过低压N_2吸附的p/p_0<0.45、p/p_0≥0.45区间分别确定分形维数D_1、D_2，表征孔表面形态粗糙度、孔结构规则性。结果表明，不同粒度构造煤具有不同的分形维数，D_1、D_2的变化范围分别为2.616 6～2.778 9,2.499 7～2.553 7。平均孔径是影响分形维数的重要参数，平均孔径降低，D_1减小（孔表面形态越平滑），D_2增加（孔结构越不规则）；2～5 nm孔是控制分形维数的关键指标，2～5 nm孔增多，D_1减小，D_2增加。研究成果可为构造煤的吸附性分析和安全开采提供理论参考。

关键词(KeyWords)： 构造煤;煤粒度;分形维数;FHH理论;低压N_2吸附

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（42262022,41972184）

作者(Author): 侯世辉,王小明,李丹阳,党正

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