Surrounding rock control technology of gob-side entry retaining in deep high mining face

Abstract

Under the influence of multiple mining influences, the mining pressure is more intense and the surrounding rock deformation is large, which is easy to cause the surrounding rock instability of gob-side entry retaining in fully mechanized mining face. In order to study the surrounding rock control problem of gob-side entry retaining in large mining height working face, taking 1313 working face retaining roadway as the research background, the movement characteristics of surrounding rock of gob-side entry retaining roadway were analyzed through theoretical analysis, numerical simulation, on-site practice, and other methods. The “support unloading balance” coordinated control technology for roadway surrounding rock was proposed, which strengthened the support strength of roadway surrounding rock and improved the stress environment of roadway surrounding rock. It was verified through on-site engineering practice. The deformation of the top and bottom of the roadway in a mine 1313 working face is 246 mm, and the deformation of the two sides is 442 mm. There is no obvious bulging phenomenon on the surface of the roadway, and the deformation of the surrounding rock of the roadway meets the relevant regulations of the operation regulations.

Keywords

• surrounding rock instability of roadway
• large mining height working face
• gob-side entry retaining
• cooperative support
• surrounding rock control