基于能量理论的水力裂缝扩展模型研究与应用

摘要

In order to accurately describe the law of fracture propagation, the article, from the energy distribution, presents a new idea about establishing the criterion of crack propagation, explores the regulation of energy changes in the fracture propagation process and then obtains the relevant expression of driving force of fracture propagation. At the same time, the criterion of crack propagation with the expression of driving force of fracture propagation is put forward, and the calculation model of crack propagation rates is built. The calculating result is accurate and agrees well with practical ones.%　　为了能够准确地描述裂缝扩展规律，本文通过能量分布状态规律，探讨了在裂缝扩展过程中能量的变化规律，在对裂缝扩展的建立方面给出了新的思路，并由此对裂缝扩展驱动力给出了相对应的表达式。提出了有关裂缝扩展驱动力的裂缝扩展准则，建立了关于裂缝扩展速率计算模型。实例计算结果表明，该模型计算结果与实际吻合较好。