中国矿山工程

The method of gob-side entry retaining of waste filling working face plays an important role in the technology of non-pillar mining in coal mines, which is widely used in mining thin and medium thickness coal seams, nevertheless, the roof weighting is still drastic, and the entry retaining effect is poor. In order to further perfect the wall rock control technology of gob-side entry retaining of working face in actual engineering application, and to reduce the entry retaining cost, the 11101 working face is used as the background, through engineering site practice, the wall rock structure of gob-side entry retaining in waste rock mining, the stress process of entry retaining wall rock, the wall rock deformation and the movement features of overburden are analyzed; and based on the results of stress analysis of entry retaining wall rock and the wall rock control principles of gob-side entry retaining of waste filling working face, the Anchor Cable+Reinforcing Rock Bolt and other solutions are rolled out. The monitoring system is designed to monitor the deformation of entry retaining wall rock and the bearing performance of the separating wall of entry retaining. The site monitoring results show that the deformation of the haulage drift is small, within the controllable range, which means that the entry retaining is successful and can provide a reference for using the entry retaining wall rock control technology under similar conditions.