Division of“Six Belts and Five Types”of carbonate region and control of karst geological disaster in Wuhan

In order to study the causes and prevention measures of karst geological disaster in Wuhan, based on the plane and profile distribution of carbonate rocks,the author put forward the concept of"Six Belts and Five Types"(SBFT). Based on SBFT,the region of carbonate can be divided into 3 risk areas, namely the high,middle and low risk area. The prevention principle of karst geological disaster is different in each risk area. High risk areas are the focus of karst geological disaster prevention;it is the basic prin-ciple to stop the overlying sand erosion. The prevention and control principle of the middle risk areas is to protect the integrity of the old clay or red layer. In low risk area,we should pay attention to soil caves lo-cating to the interface between old clay and rock in the outer suburbs. It should be under the guidance of the prevention principle and based on its karst geological section to formulate corresponding prevention mea-sures for each risk area.