Abstract: Gob flexible filling walls (usually with tatter gangue filling) can adapt to produce along the movement of roof roadway deformation and dynamic load effect, with the tunnel roof coordinated movement, ensuring the security and stability of the roadway. But due to the complexity of random crushing gangue individual and underground environment, it can not be quantitatively support design. Aiming at this problem, mastered the bag gedgangue confined stress-strain relationship through the test of bagged refuse Laboratory mechanical; realized the quantitative optimization of roadway rib support through the flexible bag waste filling wall design; finally, optimization of process technology of gob-side entry retaining based on flexible bag goaf filling wall; engineering practice showed that, filling wall intact stability, strong tightness, wall compression and roof subsidence is respectively 350mm and 126mm. They are at a reasonable interval. It shows that the research can make roadway retained, can be in similar conditions to promote the application of.

Key words: flexibility, goaf filling wall, gob-side entry retaining, quantitative optimization, stress-strain relationship