Creep behavior and permeability evolution of coal pillar dam for underground water reservoir
Yulong Chen1
Xianjie Hao2
Dongjie Xue2
Zhe Li2
Xiaoran Ma2
1.State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing,China;China University of Mining and Technology,Beijing,Beijing,China2.China University of Mining and Technology,Beijing,Beijing,China
摘要：Using goof as water storage space plays a vital role in the ecological environment and economic development of arid mining areas,while the rock strength and the stability of coal pillars in underground water reservoirs are closely related to creep process.In this work,triaxial creep-seepage tests were conducted for coal samples to develop new insights into the creep behavior and permeability evolution.The results showed that the creep deformation and permeability evolu-tion of coal samples exhibit three stages,namely,the compaction hardening stage before the stress threshold,volumetric compaction stage,and volumetric dilatancy stage.The coal permeability decreases first and then increases with the creep strain and it is well correlated with the variation of volumetric strain.
机标关键词：permeabilityevolutionbehaviorwatercoalcreeppillarreservoir
论文发表日期：2023-02-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：6( 136-141 )
英文信息