CAJ | 학술논문

采用渗流力学、断裂力学理论结合Monte Carlo方法描述岩体裂纹的随机分布，研究高水压作用下岩体原生裂纹的变形和翼形裂纹的萌生、扩展、贯通的渗流-断裂耦合作用机制，建立高水压作用下岩体裂纹的渗流-断裂耦合数学模型，给出该数学模型的求解策略与方法，在 Fortran95平台下开发高水压下岩体裂纹扩展的渗流-断裂耦合分析程序 HWFSC.for。高水压下岩体裂纹扩展的渗流-断裂耦合体现在岩体裂纹网络和渗流初始条件都随渗流时步变化。对高压注水岩体裂纹扩展过程进行渗流-断裂耦合分析。结果表明，高压注水条件下，岩体裂纹扩展存在起动水压力，当水压力大于起动水压力时，裂纹尖端开始萌生翼形裂纹，随着裂纹水压力的增加，翼形裂纹扩展，进而与其他裂纹搭接贯通，停止扩展。渗流-断裂耦合分析考虑了裂纹动、静水压力对裂纹产生的法向扩张效应及翼形裂纹的扩展而形成新的渗流通道两方面的影响，连通裂纹数随渗流的发展而增加。岩体裂纹的渗流-断裂耦合分析，能较真实地再现岩体裂纹的水力劈裂现象，描述岩体裂纹的扩展、贯通过程及与之相耦合的渗流响应。
채용삼류역학、단렬역학이론결합Monte Carlo방법묘술암체렬문적수궤분포，연구고수압작용하암체원생렬문적변형화익형렬문적맹생、확전、관통적삼류-단렬우합작용궤제，건립고수압작용하암체렬문적삼류-단렬우합수학모형，급출해수학모형적구해책략여방법，재 Fortran95평태하개발고수압하암체렬문확전적삼류-단렬우합분석정서 HWFSC.for。고수압하암체렬문확전적삼류-단렬우합체현재암체렬문망락화삼류초시조건도수삼류시보변화。대고압주수암체렬문확전과정진행삼류-단렬우합분석。결과표명，고압주수조건하，암체렬문확전존재기동수압력，당수압력대우기동수압력시，렬문첨단개시맹생익형렬문，수착렬문수압력적증가，익형렬문확전，진이여기타렬문탑접관통，정지확전。삼류-단렬우합분석고필료렬문동、정수압력대렬문산생적법향확장효응급익형렬문적확전이형성신적삼류통도량방면적영향，련통렬문수수삼류적발전이증가。암체렬문적삼류-단렬우합분석，능교진실지재현암체렬문적수력벽렬현상，묘술암체렬문적확전、관통과정급여지상우합적삼류향응。
With the theory of fluid mechanics and fracturing mechanics combined with Monte Carlo method to describe random distribution of rock cracks, seepage-fracture coupling mechanism involving deformation of primary crack, initiation, propagation and coalescence of wing cracks under high hydraulic pressure was studied. The mathematical model of seepage-fracture coupling of rock masses cracks propagation was established. The solving strategies and methods were proposed, as well as developing the analysis program HWFSC.for for seepage-fracture coupling of cracks propagation under high hydraulic pressure on the Fortran95 platform. The fact that crack networks and seepage initial condition vary with seepage conditions embodies in seepage-fracture coupling of cracking propagation under high hydraulic pressure. Coupling analysis of the process of rock cracking propagation during high pressure water injection process comes to the conclusion: starting water pressure has been shown to reside in rock cracking propagation under high hydraulic pressure, when the water pressure is more than the starting water pressure, the wing crack is born on the crack tips, as water pressure on the crack tips increases, the wing cracks propagate, and then coalesce with other cracks, finally stop propagating . The analysis of seepage-fracture coupling considers the influence of the dynamic and static water pressure of the cracks on the cracks normal expansionary and the wing cracks propagation, and the number of connected cracks increases as the seepage develops. Analysis of seepage-fracture coupling analysis of rock cracks can re-create the phenomenon of hydraulic fracturing, describe the process of rock cracks propagation, the rock bridge coalescence and inter-coupling response of seepage in fractured rock masses.