The deformation of ruptured rock mass is the mostly causation of ground subsidence over goaf. Based on the structure plane and block features of ruptured rock mass in and over longwall goaf, the ruptured rock mass construction are divided into four types. The broken expand coefficient and press solid features of ruptured rock mass are studied by the broken expand and press solid tests and modeling experiment, and the distribution laws of the rock residual broken expand coefficient in and over goafare carried out.