老采空区破裂岩体变形性质研究

Research on Ruptured Rock Mass Deformation Characteristics of Longwall Goafs

废弃采空区破裂岩体变形是导致地表沉陷的主要原因。根据长壁采空区及其覆岩中采动次生结构面和结构体特征,将长壁采空区覆岩结构划分为四种类型。通过岩石碎胀与压实试验和相似材料模拟试验,研究了采空区破裂岩体碎胀与压密特征,指出了长壁采空区破裂岩体碎胀系数分布规律。

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.