摘要
应用真实破裂过程分析系统RFPA^2D2．0渗流版本，从细观力学角度出发，以赋予材料非均匀性为特点，采用有限元计算方法，通过创建渗流-应力-损伤耦合模型，模拟分析了不同射孔角度条件下的非均质岩体在孔隙水压力作用下的水压致裂过程．模拟分析结果表明，无论射孔角度如何变化，裂纹的发展方向始终趋向最大主应力方向；随着射孔角度的增加，逐渐形成双翼型转向裂纹，射孔方位角越大，裂纹的转向越明显，转向距离越大；0°-30°为最佳射孔方位角．数值模拟结果与实验结果相一致．
Hydraulic fracturing process of the heterogeneity rockmass under different perforation angles was simulated using the RFPA^2D2.0-Flow. Considering the heterogeneous characteristics of rock in a meso-scale, a seepage-stress-failure coupling model was created based on the finite element calculation method. The simulation results show that the maximum principal stress controls the fracture propagation direction no matter how perforation angle changes. With the increase of the perforation angle, a turning fracture becomes more obvious and the turning distance bigger. The best perforation angle area is from 0~ to 30~. The numerically simulated results were in agreement with the exoefimental results.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第11期1638-1641,共4页
Journal of Northeastern University(Natural Science)
基金
国家重点基础研究发展计划项目(2011CB013503)
关键词
非均匀性
射孔角度
裂纹扩展
水压致裂
数值模拟
heterogeneity
perforation angle
fracture evolution
hydraulic fracturing
numericalsimulation
