👉 The term "underhole" is used in the context of underground structures or systems, such as wells, gas pipelines, or underground tunnels. It refers to a portion of the earth's surface where natural gases and water are trapped by rock formations and can be accessed through drilling or excavation methods. Underholes can provide access to these resources, which could include oil, gas, coal, or other valuable minerals. They are often used for mining, exploration, or other industrial purposes.
