应用数学和力学2023，Vol.44Issue(12)：1463-1472,10.DOI:10.21656/1000-0887.440171
井壁破裂与内部应变状态机理分析
Mechanism Analysis of Wellbore Fracture and Internal Strain State
摘要
Abstract
To study the mutual law between the vertical shaft wall fracture and the internal strain,a physical model for the shaft wall was built to simulate the process and state of the shaft wall stress fracture.The distrib-uted optical fiber technology was used to monitor the internal strain of the shaft wall,and the in-depth analysis was conducted from multiple perspectives of stress and strain.The results show that,for the strain state,the wellbore strain degree will increase with the applied stress.In the wellbore position corresponding to the maxi-mum strain value,the strain degree will reach the maximum value within the range,and the risk of fracture will be the highest.For the stress effect,the larger the deviation between the maximum and minimum strain values of the wellbore under different stresses is,the poorer the wellbore stability will be,and the more likely it will rupture.The analysis of the correlation between stress and strain,and the fitting of the linear equation of strain change at the wellbore position corresponding to each direction angle indicate that,the larger the change rate value is,the bigger the growth rate of wellbore strain will be.For the strain value exceeding the allowable lim-it,the wellbore is more prone to fracture.Through monitoring of the wellbore strain data and analysis of the strain difference,deviation and strain change rate,and combined with the Lame formula,a wellbore strain rup-ture relationship model was established.The study provides a new scheme for wellbore rupture warning.关键词
立井井壁/应力-应变/井壁应力/线性拟合Key words
vertical shaft wall/stress-strain/wellbore stress/linear fitting分类
矿山工程引用本文复制引用
胡锐,贾晓芬,赵佰亭,兰世豪,李德权..井壁破裂与内部应变状态机理分析[J].应用数学和力学,2023,44(12):1463-1472,10.基金项目
安徽省自然科学基金(面上项目)(2108085ME158) （面上项目）
国家自然科学基金(面上项目)(52174141) （面上项目）
安徽高校协同创新项目(GXXT-2020-54) （GXXT-2020-54）
