In order to surmount the disadvantages of high curing cost,low strength and high permeability coeffi-cient in the traditional sludge solidification method,the skeleton-building method is adopted to treat the coal gangue and sludge.Consolidated-undrained triaxial,the low temperature nitrogen adsorption,the flexible wall permeability tests were tested the macro mechanical strength,pore parameter,the hydraulic conductivity of solidified sludge.It can be obtained by experiment that the deviator stresses of 2 and 3 specimens are larger,the smallest ...