急倾斜煤层坚硬底板应力分布特征和岩移控制

 为了研究急倾斜煤层充填开采底板岩层移动的控制效果，基于龙湖煤矿南二采区急倾斜煤层的赋存条件，采用离散元UDEC数值计算，分析了急倾斜煤层采空区不充填和充填开采不同方式下底板岩层移动和应力分布特征。结果表明：急倾斜煤层开采底板岩层应力卸载区、应力降低区和支承压力区均呈非对称抛物线拱型分布；急倾斜煤层开采应力卸载角和卸载拱拱高均随煤层采厚的增加呈增大趋势；急倾斜煤层充填开采可以有效降低底板岩层卸载区、支承压力区范围和减小底板岩移，有利于急倾斜煤层采场围岩的稳定。

Floor Stress Distribution and Strata Movement Control of Backfilled Mining in Steep Inclined Seam

Based on the occurrence conditions of steep seam and hydrological engineering geological conditions in South No.2 Section of Longhu coal mine, UDEC numerical calculation is used in this paper to analyze the floor movement and stress distribution with different roof control style in steep seam. The results indicate that stress unloading zone, reduce zone and abutment pressure zone all present asymmetric parabolic arch type distribution in steep seam; unloading angle and unloading arch height increase with coal seam height; backfilling mining can reduce unloading zone, abutment pressure zone and of floor strata deformation and it is beneficial to surrounding rock stability in steep seam.