采动诱发滑坡的变形机理及治理设计研究  

INVESTIGATION AND REINFORMATION DESIGN OF LANDSLIDE INDUCED BY UNDERGROUND MINING

作　　者：徐杨青 吴西臣 钟祥君 

机构地区：[1]中煤科工集团武汉设计研究院,武汉430064

出　　处：《工程地质学报》2012年第5期781-788,共8页Journal of Engineering Geology

摘　　要：以山西某大型煤矿工业场地滑坡勘察与治理工程为例,分析了地下采矿对古滑坡稳定性的影响及复活机理:即采动变形降低了滑坡体土层的力学强度;采动拉裂缝为地表水和雨水的下渗提供了渗透路径,导致滑带土发生软化;滑坡前缘的采空移动变形对滑坡体起着牵引作用。采用工程地质测绘、钻探、物探及实时GPS监测系统等综合手段确定了滑坡周界、滑动面及滑动主方向与变形速率;根据滑坡的空间形态、物质结构及变形特征对该滑坡体在空间上分区、剖面上分级,并据此设计了分区治理、分级支挡和留设地下抗滑煤柱等的滑坡治理方案。监测资料表明,经治理后的滑坡处于稳定状态。This paper studies a landslide at a large coal mine site in Shanxi province. The effect of underground mining on the stability of the old landslide and the reactivation mechanism are analyzed. The mining displacement can greatly reduce the strength of the soil. The tensile cracks can provide infiltration path for surface water which can reduce the physical and mechanical properties of the soil of sliding zone. The gob movement and deformation in the front of landslide play a dragging role in the damage of the landslide. The boundaries and the sliding surface of the landslide have been determined by the ways of engineering geological mapping, drilling, geophysical investiga tion and deformation monitoring. The landslide is zoned based on the topography, material composition and deform ation characters. The mitigation measures of ordered retaining structures in the landslide and antisliding pillar in the mine have been carried out according to the deformation characteristics, geological and environmental conditions and mining demand. Monitoring data show that the landslide keeps stable as the mitigation measure putting into effect.

关 键 词：采空区 采动滑坡 分区治理 抗滑煤柱 

分 类 号：P641[天文地球—地质矿产勘探]