Research on the Reasonable Coal Pillar Width and Surrounding Rock Supporting Optimization of Gob-Side Entry under Inclined Seam Condition

In order to study the optimal coal pillar width and surrounding rock control mechanism of gob-side entry under inclined seam condition, 130205 return air adjacent 130203 gob in Yangchangwan No. 1 well is taken as a typical engineering background. By means background analysis, theoretical analysis based on inside outside stress field, numerical simulation by FLAC3D software, situ industrial test relevant monitoring methods, technology are obtained. The results show that influence range field about 12.2∼12.8 m calculation result; 10 column, overall deformation roadway relatively small within reasonable construction, so along set which more reasonable; cross-section characteristics special-shaped lead asymmetric distribution fragmentation rock, then coupling effect roof prestressed anchor + high-strength single cable truss support proposed. this method effective for maintenance entry, conclusions provide new guidance conditions.