工程科学与技术2017，Vol.49Issue(4)：78-85,8.DOI:10.15961/j.jsuese.201601087
内水压下含中空裂隙新型材料的压裂试验及数值模拟研究
Fracturing Experiment and Numerical Simulation Study on New Material Containing a Hollow Internal Crack Under Internal Water Pressure
摘要
Abstract
A new resin material is developed,which is completely transparent and has more brittle rock-like fracture properties than before.Its tension-compression ratio is up to 1/6.6 at-15～-10 ℃ and open fractures can be made inside.Water injection device,loading equipment and technological methods are correspondingly designed.Experiments on hydraulic fracturing are carried out.Cases of two different internal water pressures under uniaxial compression and one constant internal water pressure under biaxial compression are investigated.Failure and secondary crack propagation processes of the specimen are described and analyzed in detail,and the produce condition and mechanism are studied.Furthermore,comparative study on specimen failure and secondary crack propagation between cases of water pressure and no water are also conducted.Besides,numerical simulation is carried out using FLAC3D.Based on isotropic fluid model of FLAC3D,a new elastic-brittle constitutive model is introduced and mechanical parameters and permeability coefficients of damaged elements are redefined.The superfine and reasonable form of unit division is also required.The numerical simulation results are in good agreement with the testing results in this paper,which suggests the effectiveness of the new numerical simulation method.关键词
内水压/压裂试验/FLAC3D数值模拟/二次开发Key words
internal water pressure/fracturing test/numerical simulation by FLAC3D/secondary development分类
建筑与水利引用本文复制引用
付金伟,朱维申,张新中,石路杨,谢富东..内水压下含中空裂隙新型材料的压裂试验及数值模拟研究[J].工程科学与技术,2017,49(4):78-85,8.基金项目
国家自然科学基金资助项目(51608117) （51608117）
华北水利水电大学高层次人才科研启动项目资助(4001/40487) （4001/40487）
高等学校博士学科点专项科研基金博导类资助项目(20130131110033) （20130131110033）
