【摘要】 近年抚顺西露天矿矿区滑坡在规模、活动频率以及空间发育位置等方面均与矿区历史滑坡呈现出较明显的时空差异性,为矿区未来治理提出新的挑战。故基于改进频率比模型,选择人类工程活动(主要是采矿工程扰动)和工程地质条件两类致灾因素,对由矿区滑坡时空差异所导致的易发性变化进行研究。结果表明:影响矿区滑坡灾害的主要因素包括坡体结构、工程岩组和水文地质条件;矿区滑坡易发性较2010年前有所降低,高易发区和较高易发区面积共减少1.294 km~2,但北帮中区等地段仍呈高易发态势;滑坡易发区的空间位置与2010年前后对比发生了较大变化,矿坑西北帮滑坡易发性大幅降低,东部环矿区境界50～500 m处滑坡易发性轻微降低,北帮中段与南帮中、西段顶部滑坡易发性增加,其中北帮中段为目前最易发的区段。研究结果可为矿区闭坑停采后边坡整治及后续规划利用提供参考依据。更多还原

【Abstract】 In recent years landslides occurred in the Fushun West open-pit mining area compared with previous ones show obvious temporal and spatial variations in the scale,activity frequency and spatial position,followed up by changes in landslide susceptibility,which presents new challenges for future treatment.We compared susceptibility changes caused by the temporal and spatial differences using the Improved Frequency Ratio model on the selected two types of hazard-triggering factors,including human engineering activities (mainly mining engineering disturbances)and engineering geological conditions.And the results pointed to slope structure,engineering rock group and hydrogeological conditions as the influencing factors.Compared with how it was in 2010,current landslide susceptibility has decreased,and the extremely high-high prone areas have decreased by 1.294 km~2 in size;however,there is still a high incidence trend in the middle area of the north side.And the spatial location of the currently high landslide-prone areas has undergone major changes.The landslide susceptibility in the northwest side of the mine shows a sharp decline,and it has also reduced slightly at 50～500 m away from the eastern boundary of the mining area,while it has increased in the middle section of the north slope,and the top of the middle and west section of the south slope.Especially,the middle section of the north slope is the most landslide-prone area.The research results provide reference basis for slope treatment and follow-up planning after mining closure.更多还原