河南灵宝大湖金矿滑坡形成机制分析与稳定性评价  

MECHANISM ANALYSIS AND THE STABILITY EVALUATION OF THE LANDSLIDE AT DA HU GOLD ORE AREA IN HENAN PROVINCE

作　　者：王春帅[1] 星玉才[1] 何进[1] 邹乾胜[1] 

机构地区：[1]河南省地质调查院,洛阳471023

出　　处：《地质灾害与环境保护》2007年第2期70-74,共5页Journal of Geological Hazards and Environment Preservation

摘　　要：矿区经过多年的开采,在地下留下了大量的采空区,地下的软弱破碎带,为滑坡体提供了潜在的不稳定结构面,使原本力学强度较低的软弱破碎带整体抗剪强度明显下降,在长期的应力重新分配情况下,上部岩体应力追踪软弱结构面使剪应力密集,使滑带得以贯通,发生滑移变形,并产生与滑移方向近于垂直的拉张裂缝,使得变形体与母岩脱离,进而产生滑坡。滑坡的形成机制包括地形条件和地质条件,降水、人类采矿活动和地震,分析了采空区塌陷与滑坡的关系。人类采矿活动和降水是诱发滑坡的主要因素。在形成机制分析的基础上,对矿区内的滑坡稳定性进行评价,为滑坡的防治提供地质依据。Exploitation for years has left the mine areas large amounts of empty quarry zones and contributed to crumbling belts with lower mechanical strength, which evidently degrades the sheering strength and cause the potential unsteady structure of landslip body. Owing to the redistribution of long--term stress, upper rock strata tracing the rickety level cause the stress intense and run through the slide belts to deform and develop the approximately vertically tensile cracks. Because of the separation of deformed body from bedrock mass, landslide is therefore formed on the basis of topographical and geological conditions, rainfall and earthquake as well as the human mining activities. According to the analysis of the relationship between the cavein of empty quarry zones and landslide, main factors causing landsliding are the human mining activities plus rainfall. On the other hand, the analysis of mechanism of development of landslide by estimating the stability of the mine areas has been made to provide the geological reference to harnessing the landslide.

关 键 词：采矿 滑坡 形成机制分析 稳定性评价 

分 类 号：P642.22[天文地球—工程地质学]