辽宁工程技术大学学报（自然科学版）2026，Vol.45Issue(2)：137-145,9.DOI:10.11956/j.issn.1008-0562.20250444
尺寸效应影响的抽采孔周煤体分区渗透特征
Regional permeability characteristics of coal around drainage borehole affected by size effect
摘要
Abstract
To elucidate the influence of gas channel permeability resistance around dual-prevention boreholes in coal mines with compound disasters of coal and gas outbursts and rock bursts,triaxial permeability tests were conducted on single-graded and composite specimens with varying heights.Analyzing the relationship between permeability and specimen height,revealed the size effect of permeability.The head loss along the flow path model was introduced to characterize permeability considering the frictional head loss along the flow path(CFR).The zonal permeability characteristics within the influence area of dual-prevention boreholes were clarified.The results indicate that the primary mechanism behind the permeability size effect is the intensification of inertial effects with increasing seepage channel length.Permeability characterized by the CFR,which accounts for this inertial effect,can be used to identify dominant gas migration pathways.The study confirms that coal mass size is a key factor influencing affecting permeability capacity,providing a theoretical basis for optimizing borehole layout and enhancing gas extraction efficiency.关键词
双防钻孔/渗流阻力/渗透率/煤体尺寸/破碎试样/组合体试样Key words
dual-prevention boreholes/seepage resistance/permeability/coal size/broken specimen/composite specimen分类
建筑与水利引用本文复制引用
张天军,初雨航,张磊,潘红宇,曹妍..尺寸效应影响的抽采孔周煤体分区渗透特征[J].辽宁工程技术大学学报（自然科学版）,2026,45(2):137-145,9.基金项目
国家自然科学基金项目(52374228 （）
52104216 （）
52274226) （）
