渗透水压对节理应力-渗流耦合特性的影响试验研究  

Experimental study of influence of seepage pressure on joint stress-seepage coupling characteristics

作　　者：尹立明[1] 陈军涛[1] 

机构地区：[1]山东科技大学矿山灾害预防控制国家重点实验室(培育),山东青岛266590

出　　处：《岩土力学》2013年第9期2563-2568,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.51274132;No.51034003;No.51104094;No.51274135);国家重点基础研究发展计划(973计划)资助项目(No.2011CB411906)

摘　　要：为研究渗透水压对节理应力-渗流耦合特性的影响,通过对6组人造节理试件恒定法向载荷和恒定法向刚度的压剪渗流试验,分析了应力和位移、节理水力开度以及透过率随剪切位移的变化趋势,获得了渗透水压对节理岩石应力-渗流耦合特性的影响规律。结果表明:节理试件的剪切应力和位移、水力开度以及透过率都与渗透水压密切相关。剪切应力随渗透水压的增大而减小,法向变形、水力开度和透过率却随渗透水压的增大而增大。在压剪渗流试验过程中,不同渗透压力的节理试件都发生了剪胀效应。研究可为深部岩体工程围岩遇水作用稳定性及渗流灾害控制技术提供科学的理论依据。In order to study the influences of seepage pressure on joint stress-seepage coupling characteristics, changing trends of rock stress, displacement, joint hydraulic aperture and conductivity along with shear displacement are analyzed according to compression-shear seepage tests of six groups man-made joint specimens under constant normal load（CNL） and constant normal stiffness（CNS）; and the influencing law of seepage pressure on stress-seepage coupling characteristics of joint rock is obtained. The results indicate that shear stress, displacement, hydraulic aperture and conductivity of joint specimen are related to seepage pressure obviously. The shear stress decreases along with the increase of seepage pressure. Normal deformation, hydraulic aperture and conductivity increase as the seepage pressure increases. During the compression shear seepage test, shear dilatancy effect appears in joint specimens under different seepage pressures. The research could provide scientific theory basis for surrounding rock stability when encountering water and control technology of seepage hazard of deep rock engineering.

关 键 词：应力-渗流耦合 恒定法向刚度 水力开度 透过率 渗透水压 

分 类 号：TD713[矿业工程—矿井通风与安全]