煤矿安全2023，Vol.54Issue(12)：25-31,7.DOI:10.13347/j.cnki.mkaq.2023.12.005
水分对煤全应力-应变过程渗流特征的影响
Influence of moisture on seepage characteristics of coal during total stress-strain process
庄小威 1唐朝 2武海涛1
作者信息
- 1. 山西潞安集团 余吾煤业有限责任公司,山西 长治 046100
- 2. 辽宁工程技术大学 安全科学与工程学院,辽宁 葫芦岛 125105
- 折叠
摘要
Abstract
In order to study the influence of moisture on seepage characteristics of coal during the complete stress-strain process,the complete stress-strain process with seepage experiment of dry coal sample and full-water coal sample were carried out,and the com-plete stress-strain characteristics and permeability evolution laws of two coal samples were analyzed.The experimental results showed that the complete stress-strain curve of dry coal sample had five stages,while the full-water coal sample had only four stages.After the peak stress destruction,the axial stress of full-water coal sample fell by 36.82%,and the strain softening phase disappeared in the full stress-strain curve.Compared with dry coal samples,the compressive strength,elastic modulus and peak stress of satur-ated coal samples decreased by 8.95%,8.54%,8.90%and 10.87%respectively.The permeability of dry coal sample increases with the increase of axial strain,and the relationship is linear.The relationship between permeability and strain of saturated coal sample has obvious stages,which can be divided into stable seepage stage and rapid seepage stage.The existence of water will inhibit the gas seepage process of coal body,so the drainage of coal seam should be paid attention to in the gas extraction project.关键词
水分/全应力-应变/渗流特征/瓦斯抽采/煤层透气性Key words
moisture/complete stress-strain process/feature of seepage/gas extraction/permeability of coal seam分类
矿业与冶金引用本文复制引用
庄小威,唐朝,武海涛..水分对煤全应力-应变过程渗流特征的影响[J].煤矿安全,2023,54(12):25-31,7.
