critical internal water pressure

Using fracture propagation engineering criterion, calculation formulae of critical internal water pressure of two kinds of failure model are obtained respectively; and its effect laws as fracture direction and lateral geo-stress coefficient are studied. Some following conclusions can be drawn:1.
应用工程近似裂纹失稳准则,分别推导出两种破坏模式的临界水压计算公式,并对其随裂纹方向变化的规律进行分析。