断裂活动影响矿区的采煤沉陷灾害问题

Ground subsidence in the coal mine areas affected by active faults

文章结合抚顺矿区实际,分析论述了断裂活动影响矿区的地应力环境特征。阐述了在断裂活动影响矿区,岩体长期大规模开挖造成局部区域构造应力卸载,岩体弹性变形能恢复发生水平变形,导致地表产生附加水平移动与变形。通常的沉陷区边缘区域,地表移动变形值不大,采动损害也相对较轻。但断裂活动影响矿区,沉陷区边缘区常存在着明显的水平移动与变形,并造成相应损害。尤其是在矿震等岩体地质动力现象显现影响下,地表沉陷灾害更为严重。

Investigation shows the coal mine areas affected by active faults suffer more severe grourd subsidence than those not affected by active faults. It is found that large scale and long time of excavation has made tectonic stress unload in some areas, elastic deformation makes rockmass change horizontally, resulting surfacal horizontal displacement in these mine areas. The of surface displacement is not big; mining damage is also not serious in the edge of subsidence areas not affected by active faults. But in the mine areas effected by active faults, the horizontal displacement and deformation are significant.