Abstract:The physical and mechanical interaction of groundwater-soil-rock mass in karst collapse evolution is discussed elaborately and a coupling mode is established and studied. Analysis results show that the evolution of karst collapses connects closelywith the coupling interaction ofgroundwater-soil-rockmass. The material carrierof collapses is the covering soil mass and the rock’s top layer, and the groundwater is stored in the soil-rock mass. Complicated physical, chemical and mechanical interactions exist between the groundwater and the soil-rock mass, while stress and mass transfer exists between soil and rock masses. On the other hand, the change in soil-rock mass’s structure and stability will influence groundwater’s movement, and the change of groundwater’s movement influences soil and rock mass’s structure and stability state in reverse, until the appearance of karst collapses.