香源煤业沿空留巷围岩变形特征分析

Characteristics of Surrounding Rock Deformation of Gob-side Entry Retaining in Xiangyuan Coal Mine

以香源煤业沿空留巷开采近距离薄煤层为工程背景,运用FLAC3D数值模拟软件分析沿空留巷围岩的变形特征。通过在开切眼前方布点监测其位移和应力,分析了不同充填体宽度、不同推进度下沿空留巷围岩变形及应力分布规律,指出充填体宽度与沿空留巷围岩变形的关系以及留巷顶底板受水平应力的影响。详细介绍了该矿沿空留巷期间基本支护、加强支护以及充填体支护方法,对相同条件下沿空留巷围岩控制问题提出了几点意见。

Taking close distance thin seam mining of gob- side entry retaining in Xiangyuan Coal Mine as engineering background,surrounding rock deformation characteristics of gob- side entry retaining are analyzed by the use of numerical simulation software FLAC^3 D. Displacement and stress is monitored by arranging monitoring sites in front of open- off cut,surrounding rock deformation and stress distribution under different filling body width and different degrees advance are analyzed. We point out the relationship between the width of the filling body and gob surrounding rock deformation,and the impact of the level of stress on the roof and floor. The mine support methods of basic support,reinforced supporting and filling body support at different locations during gob- side entry retaining period are introduced in detail,finally,a few comments about surrounding rock control in gob- side entry retaining with similar conditions are proposed.