RDB: Daybreak

Underground cavities created by humans can collapse due to a lack of stability and cause a collapse funnel on the earth's surface, especially if there is little overlap. Reasons for the creation of underground cavities are facilities for mining, water management or defense, as well as for the storage of commercial goods and other things.

人工开凿的地下空腔会因稳定性不足而发生坍塌，并在地表形成塌陷漏斗（collapse funnel），当空腔间的重叠覆盖范围较小时，该风险尤为突出。地下空腔的形成原因包括采矿作业设施、水资源管理工程、国防工程，以及商业货物存储或其他用途的相关工程。