防灾减灾工程学报2026，Vol.46Issue(2)：325-336,12.DOI:10.13409/j.cnki.jdpme.20240828004
基于相场法的高压电脉冲-水力压裂岩体裂缝扩展规律研究
Study on Fracture Propagation in Rock Masses under High-voltage Electric Pulse and Hydraulic Fracturing Based on Phase Field Method
摘要
Abstract
To investigate the fracture propagation patterns in rock masses subjected to high-voltage electric pulse and hydraulic fracturing,based on fluid mechanics,fracture mechanics,and damage me-chanics,this study employed the phase field method and numerical software to investigate the evolu-tion characteristics of initial fractures in rock masses under the combined effects of water pressure and high-voltage electric pulses.Additionally,the increase in fracture length and the damage conditions of the rock mass were described.The results showed that voltage,water pressure,in-situ stress,water injection rate,and energy release rate all exerted certain effects on the fracture length and damage of the rock mass.Specifically,as water pressure and voltage increased,the extent of damage-induced fracturing in the rock mass intensified.When the in-situ stress decreased from 8 MPa to 6 MPa,the initial fracture growth length increased by 30%,and the damaged area of the rock mass increased by 10%.Moreover,the greater the in-situ stress difference,the more the fractures deviated toward the di-rection of the maximum principal stress.The influence of water pressure,voltage,and in-situ stress on the initial fracture growth and damaged area of the rock mass was ranked as follows:in-situ stress>voltage>water pressure.Furthermore,the study found that with the increase of water injec-tion rate and energy release rate,both the growth of initial fractures and the damaged area of the rock mass showed an increasing trend.When the water injection rate was elevated to 18 kg/(m3⋅s),multi-ple short fractures emerged in proximity to the borehole,and the initial fracture growth was significant-ly higher than that at 16 kg/(m3⋅s).When the energy release rate was elevated to 50 N/m,the initial fractures and new fractures in the rock mass increased significantly,and the damage around the bore-hole was noticeably aggravated.The research findings can provide novel insights for characterizing fracture growth and rock mass damage in rock masses subjected to high-voltage electric pulse and hy-draulic fracturing,and offer a valuable reference for adjusting the parameters of engineering rock-breaking equipment.关键词
高压电脉冲/水力压裂/电-流-固耦合/相场法/裂缝扩展Key words
high-voltage electric pulse/hydraulic fracturing/electric-fluid-solid coupling/phase field method/fracture propagation分类
能源科技引用本文复制引用
饶平平,王俊瑶,金潇,崔纪飞..基于相场法的高压电脉冲-水力压裂岩体裂缝扩展规律研究[J].防灾减灾工程学报,2026,46(2):325-336,12.基金项目
国家自然科学基金面上项目(42077435,42377171)资助 （42077435,42377171）
