不同性质气体煤体受载渗透率演化规律研究  

Study on the Evolution of Permeability of Gas Coal with Different Properties Under Loading

作　　者：曹塘根 张小东[2,3] 李泽文 雷军 罗勇 费浩 王登科 白云[1] Cao Tanggen;Zhang Xiaodong;Li Zewen;Lei Jun;Luo Yong;Fei Hao;Wang Dengke;Bai Yun(Sichuan Furong Chuannan Construction Engineering Co.,Ltd.,Yibin 644000,China;State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454000,China;School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]四川芙蓉川南建设工程有限公司,四川宜宾644000 [2]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,河南焦作454000 [3]河南理工大学安全科学与工程学院,河南焦作454000

出　　处：《黑龙江科学》2025年第6期5-11,共7页Heilongjiang Science

基　　金：国家自然科学基金资助项目(52174174);河南省高等学校重点科研项目计划基础研究专项(21zx004);河南理工大学创新团队计划(T2022-1)。

摘　　要：为研究不同性质气体压力和气体吸附时间下受载含瓦斯煤渗透率变化规律,利用受载煤岩工业CT伺服加载系统,开展不同性质气体(He/CO_(2))压力与不同吸附性气体(CO_(2))吸附时间煤体渗透率测定实验,建立了受载含瓦斯煤渗透率模型。结果表明,在围压和轴压固定的条件下,随着He孔隙压力的增大,其渗透率随之减小,而随着CO_(2)孔隙压力的增大,煤样的渗透率结果呈现非线性变化,为V字型变化。在围压轴压及孔隙压力都固定的条件下,随着CO_(2)时间的增加,其渗透率结果呈现出先减小后增大的趋势。在全应力-应变的条件下,煤样的渗透率结果随着轴压的增大呈现出先减小后增大的U字型趋势。利用实验结果对模型进行验证,发现模型与实验结果高度吻合。To study the changes in permeability of loaded gas containing coal under gas pressure and gas adsorption time,an industrial CT servo loading system for loaded coal was used to conduct coal permeability measurement experiments with different gas properties(He/CO_(2))pressure and adsorption time of different adsorbed gases(CO_(2)),and a loaded gas containing coal permeability model was established.The results show that under fixed axial and confining pressures,for non-adsorbed gases,the permeability of coal samples decreases with increase of gas pressure,while for adsorbed gases,the permeability of coal samples first decreases and then increases with increasing gas pressure,showing a V-shaped variation.Under the condition of full stress-strain,the permeability of coal samples shows a U-shaped trend of first decreasing and then increasing with the increase of axial pressure.The model is highly consistent with the experimental results.

关 键 词：含瓦斯煤 渗透率演化 气体性质 吸附时间 工业CT 

分 类 号：TD712[矿业工程—矿井通风与安全]