宿州矿区祁南煤矿构造煤甲烷等温吸附特征研究
Characterization of Methane Isothermal Adsorption in Tectonic Coal from Qinan Coal Mine, Suzhou Mining Area
DOI: 10.12677/ojns.2025.134084, PDF,    科研立项经费支持
作者: 王语彤, 李凤丽*：宿州学院资源与土木工程学院，安徽 宿州
关键词: 构造煤；宏观变形；甲烷；等温吸附；Tectonic Coal； Macroscopic Deformation； Methane； Isothermal Adsorption
摘要: 本研究选取祁南煤矿构造变形煤体作为研究样本，综合运用宏观形变观测和等温吸附测试方法，系统探讨了碎裂煤、碎粒煤两种典型构造煤及原生结构煤在30℃、40℃及50℃温控条件下的甲烷气体吸附行为。结果表明：宿州矿区祁南煤矿发育多种不同变形特征的构造煤，其甲烷吸附特征与原生结构煤存在差异。研究区煤样朗缪尔体积(VL)为23.98~28.33 cm3/g，朗缪尔压力(PL)分布在2.70~3.90 MPa之间。其中，构造煤的VL高于原生结构煤，而PL低于原生结构煤，表明构造煤甲烷吸附能力强于原生结构煤，在相同的储层压力条件下，构造煤更易发生瓦斯突出事故。在煤体吸附甲烷过程中，压力呈现显著促进作用，而温度则表现出抑制作用。具体表现为：在0~3 MPa低压区间，甲烷吸附量与压力变化呈近似线性增长关系；当压力升至3~10 MPa高压区间时，吸附量虽仍随压力升高而增加，但其增速呈现明显递减趋势。
Abstract: In this study, the tectonically deformed coal body of Qinan Coal Mine was selected as the research sample, and the macroscopic deformation observation and isothermal adsorption test methods were comprehensively used to systematically discuss the coal. The methane gas adsorption behavior of two typical structural coals and primary structural coals of broken coal and crushed coal under temperature control conditions of 30˚C, 40˚C and 50˚C was obtained. The results show that there are a variety of tectonic coals with different deformation characteristics in Qinan Coal Mine in Suzhou Mining Area, and their methane adsorption characteristics are different from those of primary structural coals. The volume (VL) of the coal samples in the study area was 23.98~28.33 cm3/g, and the pressure (PL) of the Langmuir was between 2.70~3.90 MPa. Among them, the VL of structural coal is higher than that of primary structural coal, while the PL is lower than that of primary structural coal, indicating that the methane adsorption capacity of structural coal is stronger than that of primary structural coal, and under the same reservoir pressure conditions, structural coal is more prone to gas outburst accidents. In the process of methane adsorption by coal, pressure showed a significant promoting effect, while temperature showed an inhibiting effect. The specific results showed that in the low pressure range of 0~3 MPa, the methane adsorption capacity and pressure change showed an approximately linear growth relationship. When the pressure rises to the high pressure range of 3~10 MPa, the adsorption capacity still increases with the increase of pressure, but its growth rate shows a decreasing trend.
文章引用：王语彤, 李凤丽. 宿州矿区祁南煤矿构造煤甲烷等温吸附特征研究[J]. 自然科学, 2025, 13(4): 799-806. https://doi.org/10.12677/ojns.2025.134084

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