DOI: 10.11799/ce202602007
Surrounding rock control technology for gob-side entry retaining in paste backfilling working face
GONG Ping
SHE Xiaoguang
XU Changtao
NIU Zhenpeng
Abstract：To investigate the stability and control technology of surrounding rock in gob-side entry retaining in paste backfilling working faces,we took the CT301 backfilling face in a mine in the Ordos mining area as an engineering case,and employed theoretical analysis,numerical simulation,and field industrial tests.Firstly,based on the equivalent mining height theory,the overburden movement characteristics of paste-backfilled gob-side entry retaining were analyzed.A roof mechanical model was established based on the Winkler elastic foundation beam assumption,clarifying that the backfill compaction rate is a key controllable factor affecting roof deflection,and that increasing the compaction rate effectively enhances the support effect of the backfill on the overburden.Secondly,FLAC3D numerical simulation was used to study the surrounding rock deformation and mine pressure behavior in gob-side entry retaining in the paste backfilling face.Finally,a comprehensive control technology system of"bolt-mesh-cable primary support+portal-type support for local coordinated reinforcement"was proposed.In the field application,this technology effectively controlled the roadway surrounding rock deformation,the maximum roof-to-floor and two sides deformation stabilized at approximately 190 mm and 140 mm,respectively,demonstrating significant control effectiveness for the retained entry.
Keywords：paste backfillinggob-side entry retainingoverburden movementbackfill compaction ratemine pressuresurrounding rock control
Publication Date：2026-02-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：11( 50-60 )