To improve the water stability and scour resistance of carbonaceous mudstone slopes,the surface disintegrated carbonaceous mudstone(DCM)was modified by using biopolymer guar gum.The effects of guar gum on the mechanical properties,water-holding characteristics,permeability coefficient,water stability and slope scour resistance of DCM were analyzed by unconfined compressive strength test,permeability test,water-holding characteristics test,disintegration test and slope scour model test of guar gum modified DCM under different dosing conditions.The microscopic mechanism and ecological slope prot...