临汾宏大煤矿矸石充填开采沿空留巷围岩稳定性控制技术

Surrounding Rock Stability Control Technology of Retaining Roadway Along the Goaf in Gangue Filling Mining of Linfen Hongda Coal Mine

临汾宏大煤矿8302工作面采用选充一体化工艺开采,分析矸石充填开采沿空留巷围岩变形规律,确定采空区81.5%矸石充实率,结合锚带网+锚索巷内基本支护、单体支柱挡板与夯实胶结体联合两种沿空留巷支护方案,进行围岩稳定控制技术研究。经过两个月围岩变形量数据监测,围岩位移变形量大幅降低。

The 8302 working face of Linfen Hongda Coal Mine adopts the integrated technology of selection and filling,analyzes the surrounding rock deformation law of retaining roadway along the goaf in gangue filling mining,and determines the filling rate of 81.5% gangue in goaf.Combined with the basic support scheme of anchor belt net+anchor cable roadway,single pillar baffle and rammed cement body combined with two kinds of gob retaining roadway support scheme,the surrounding rock stability control technology is studied.After two months of surrounding rock deformation data monitoring,the displacement and deformation of surrounding rock have been greatly reduced.