摘要
针对厚壁圆筒试件进行9组近30个试样的水力劈裂试验研究。通过对试验成果分析发现,在以往研究水力劈裂问题中,以著名的厚壁圆筒Lame公式为理论基础的分析方法是错误的。提出水力劈裂问题中渗透力作用机制。以弹性力学为基础,通过严密的数学力学理论推导,提出在稳定渗流作用下厚壁圆筒应力分布解析解(应用商业软件对该解析解进行验证),为岩土体的水力劈裂问题深入研究打下较严密的理论基础。针对试验成果,初步探讨厚壁圆筒水力劈裂破坏条件,提出发生水力劈裂破坏的半经验理论判别关系。
Nine groups of hydraulic fracturing tests of thirty thick-wall cylinder samples are performed; and the experimental results are analyzed. The analytical methods reported in some studies based on Lame＇s formula of the thick-wall cylinder are incorrect. Infiltration theory of hydraulic fracturing is presented. Based on elasticity mechanics and mathematics, an analytic distribution result of thick-wall cylinder under stable infiltration is put forward and it is verified by commercial software. A rigorous theory foundation is established for the research of hydraulic fracturing of rock masses. Failure condition of thick-wall cylinder on hydraulic fracturing is discussed. And a semi-empirical formulation on critical stress of hydraulic fracturing is presented.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第6期1173-1181,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50579090
50239070)
关键词
水工结构工程
水力劈裂
模型试验
厚壁圆筒
解析理论
渗透力
hydraulic structure engineering
hydraulic fracturing
model test
thick-wall cylinder
analytic theory
infiltration force
