Dynamic similarity framework and governing criteria for saturated rock masses under combined static and dynamic loading.

Summary: Imagine building a tiny model of a deep underground mine to see if it might collapse or flood. The problem is, water and rock behave differently in a small model than they do in a giant, real-world mine! Scientists have created a new "rulebook" using four special math numbers to help match the tiny models to the real thing. They found that when sudden shaking happens (like an earthquake), the rock's weight matters way more than the water pressure. Also, shrinking the model changes how water flows, making it look safer than it really is. This new rulebook helps engineers build better, safer models to prevent real-world disasters!