Aiming at the problem of roadway surrounding rock deformation during the mining of No.9+10 coal seam in Majunyu Mine,small coal pillar gob-side entry driving was adopted.Through theoretical analysis and numerical simulation,the reasonable parameters of roof cutting in gob-side entry driving and the optimal coal pillar width were determined to be 5 m.The field application results showed that after leaving 5 m small coal pillar,the variation of solid coal side and roof subsidence were reduced,and the roof cutting was lower than that of non-roof cutting side,and the effect was good.This study provided a reference for the technology of small coal pillar gob-side entry driving under similar conditions.
关键词
沿空掘巷/煤柱宽度/数值模拟/围岩变形
Key words
gob-side entry driving/coal pillar width/numerical simulation/deformation of surrounding rock
维普
万方数据