摘要
本文对含水层状页岩进行了单轴蠕变试验,研究了含水率和层理倾角对其蠕变性质的影响,构建了含水率和层理倾角与瞬时弹性模量和瞬时蠕变速率的关系。将含水率和层理倾角的影响引入Burgers蠕变模型的蠕变参数中,构建了能够反映页岩层理和含水率的蠕变模型。基于矿物成分分析解释了水岩相互作用导致的蠕变性质变化的微观机制。结果表明,层理倾角较高的页岩具有较高的瞬时弹性模量和较低的瞬时蠕变速率;含水率越高,瞬时弹性模量越低,瞬时蠕变率越高。
In this paper,the creep property of shales is examined from two viewpoints:one is bedding orientation and the other is the water content.To investigate these effects,uniaxial creep tests were carried out on water-containing bedded shales.The creep curves were continuously observed with different water contents and bedding orientations.The correlations of water content and bedding angle with the transient elastic modulus and transient creep rate were constructed.The effects of bedding angle and water content were incorporated into the creep parameters of Burgers creep model,and the microscopic mechanism of water effect was interpreted based on mineral compositions due to rock-water interaction.The results revealed that the shale with a higher bedding angle had a higher transient elastic modulus and a lower transient creep rate.A higher water content triggered a lower transient elastic modulus and a higher transient creep rate.
作者
陈宇龙
郝宪杰
腾俊洋
文志杰
CHEN Yu-long;HAO Xian-jie;TENG Jun-yang;WEN Zhi-jie(State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing 100011,China;Fundamental Science on Radioactive Geology and Exploration Technology Laboratory,East China University of Technology,Nanchang 330013,China;School of Energy and Mining Engineering,China University of Mining and Technology,Beijing 100083,China;College of Resources and Environmental Sciences,Chongqing University,Chongqing 400030,China;State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shangdong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 266590,China)
基金
Project(52009131) supported by the National Natural Science Foundation of China
Project(GJNY-20-113-05) supported by the Open Funds of State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,China
Project(2020RGET03) supported by the Fundamental Science on Radioactive Geology and Exploration Technology LaboratoryEast China University of Technology,China。
关键词
蠕变
含水率
层理
页岩
creep
water content
bedding
shale
