小煤柱沿空留巷围岩控制应用研究

Application Research on Surrounding Rock Control of Gob Side Entry Retaining with Small Coal Pillar

为保证小煤柱沿空留巷的顺利进行,通过分析掘巷和工作面回采时顶板的应力分布特征,结合巷道实际地质条件,设计了小煤柱和沿空留巷支护方案。小煤柱的宽度为12 m时,留巷后巷道围岩稳定,顶底板最大变形量210 mm,两帮移近量270 mm。

In order to ensure the smooth progress of gob side entry retaining with small coal pillar,by analyzing the stress distribution characteristics of the roof during roadway excavation and working face mining,combined with the actual geological conditions of the roadway,the support scheme of gob side entry retaining with small coal pillar was designed.When the width of the small coal pillar is 12 m,the surrounding rock of the roadway is stable after retaining roadway,the maximum deformation of the roof and floor is 210 mm,and the approach of the two sides is 270 mm.