高瓦斯矿井综放工作面矸石充填沿空留巷关键技术研究

Research on Key Technology of Gangue Filling Retaining Roadway along Goaf in Fully Mechanized Caving Face of Gassy Mine

为提高高瓦斯矿井煤炭资源回采率,以常村煤矿N3-8工作面为研究对象,分析了不同条件下矸石散体的压缩特性;采用理论分析和FLAC3D数值模拟方法研究不同因素对沿空留巷稳定性的影响,揭示了综放充填沿空留巷的巷道围岩变形特征。结果表明:采用矸石充填技术保证了充填带的稳定性,能够防止顶板发生较大离层。

In order to improve the recovery rate of coal resources in high-gas coal mines, the N3-8 face of Changcun coal mine is taken as the research object to analyze the compression characteristics of waste rock aggregates under different conditions. Theoretical analysis and FLAC3 Dnumerical simulation are used to study the effects of different factors on the gas-lane stability of the impact revealed by the fully mechanized top-coal caving laneway surrounding rock deformation characteristics. The results show that the use of gangue filling technology ensure the stability of the filling zone, to prevent the roof off a larger separation and reduce environmental pollution.