期刊论文

Seepage characteristics of single-fracture silty mudstone under low stress and overlying water environment

中文

岩土力学

1000-7598

2020

41

12

3840-3850

10.16285/j.rsm.2020.0302

No.51908073:国家自然科学基金 No.51838001:国家自然科学基金 No.51878070:国家自然科学基金 No.51908069:国家自然科学基金 No.2019SK2171:湖南创新型省份建设专项经费资助项目 No.18C0188:湖南省教育厅科学研究项目 No.CX20200811:湖南省研究生创新重点项目 No.2020JJ5581:湖南省自然科学基金

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为探究不同外部环境因素影响下浅层粉砂质泥岩边坡裂隙渗流特性,采用自主研发的岩体裂隙渗流试验装置,对含6种不同裂隙面粗糙度(JRC)的粉砂质泥岩裂隙试样进行渗流试验,研究了不同低围压和覆水深度下粉砂质泥岩裂隙渗流特性。结果表明:不同覆水深度及JRC下围压与粉砂质泥岩裂隙渗透系数均呈反相关,两者之间关系可用幂函数表征,且渗透系数的降低过程可分为快速降低(围压为0~30 kPa)和缓慢降低(围压为30~50 kPa)两个阶段,CT扫描结果验证了围压增大使得粉砂质泥岩裂隙开度减小是渗透系数随围压增大而减小的主要原因。随围压的增大或覆水深度的减小,不同JRC粉砂质泥岩裂隙渗透系数的离散程度逐渐减小...

In order to explore the seepage characteristics of fractured rock mass in the shallow silty mudstone slope under different environmental conditions, a self-developed fractured rock mass seepage apparatus was used to conduct seepage tests on fractured silty mudstone samples with six different fracture surface roughnesses(JRC). The seepage characteristics of fractured silty mudstone under different confining pressures and overlying water depths were studied. The results show that the permeability coefficient of silty mudstone is inversely correlated with the confining pressure under different ov...