煤矿安全2025，Vol.56Issue(4)：37-42,6.DOI:10.13347/j.cnki.mkaq.20240475
水平应力差异系数对水力压裂裂缝形态的影响研究
Study on the influence of horizontal stress difference coefficient on hydraulic fracturing fracture
摘要
Abstract
In order to analyze the effect of horizontal stress difference coefficient on hydraulic fracturing fracture formation,PFC2D software was used to simulate hydraulic fracturing.The parallel bond model was used to simulate uniaxial compression and Brazil splitting test for parameter calibration.The number of fracturing fractures generated under different conditions after a certain time step was calculated by using calibration parameters for simulation.The fractal dimension was calculated by binarization of hydraulic fracture images.The analysis results show that when the horizontal stress difference coefficient is large,the fracture direction is con-trolled by the maximum horizontal principal stress,and it is easier to form a single through crack,while when the horizontal stress difference coefficient is low,the control effect of the maximum principal stress is weakened,the range of micro-cracks will be ex-panded,and the hydraulic fracture complexity is relatively higher.关键词
数值模拟/水力压裂/裂缝形态/水平应力差异系数/分形维数Key words
numerical simulation/hydraulic fracturing/fracture morphology/horizontal stress difference coefficient/fractal dimension分类
矿业与冶金引用本文复制引用
张增宝,孟宪波,黄滚,朱晓明,王勇,陆驭,袁一平,冯建生..水平应力差异系数对水力压裂裂缝形态的影响研究[J].煤矿安全,2025,56(4):37-42,6.基金项目
国家自然科学基金资助项目(51674049) （51674049）
