Squeezing deformation mechanism and control technology of roadway between two goafs

In order to solve the problem of large squeezing deformation control of roadway between two goafs,the panel track-roadway between two goafs in Fenghui coal mine is taken as the engineering background,and the methods of on-site monitoring,theoretical calculation and numerical simulation are comprehensively used. The deformation characteristics of the roadway,the characteristics of the overlying strata structure,the plastic failure modes and stress environment of the surrounding rock under different mining conditions are studied. The squeezing deformation mechanism of the roadway between two goafs is revealed. A combined support design of anchoring and grouting with “strengthening key parts and grouting modified surrounding rock” as the core is proposed. The on-site monitoring results show that the new support design has good control effect on the squeezing deformation of the roadway between two goafs,which can provide reference for the surrounding rock control under similar conditions.