某排土场边坡堆置全过程渗流稳定时变分析  

Time-varying analysis on seepage and stability in the stacking process of a waste-dump slope

作　　者：罗阳华[1,2] 简文彬[1,2] 蔡泽宏 李宏达[1,2] 

机构地区：[1]福州大学环境与资源学院,福州350108 [2]福州大学岩土工程与工程地质研究所,福州350108

出　　处：《有色金属（矿山部分）》2015年第6期99-103,共5页NONFERROUS METALS(Mining Section）

基　　金：国土资源部丘陵山地地质灾害防治重点实验室开放基金(FJKLGP2012K001)

摘　　要：目前对排土场边坡稳定性多以单一安全系数作为评价标准,难以全面反映排土场边坡堆置全过程稳定性演化的实际情况。对此,以福建地区某排土场边坡作为研究对象,在掌握其工程地质条件与气象资料的基础上,研究排土场边坡堆置全过程各阶段在降雨与蒸发作用下渗流稳定的时变规律。研究结果表明,在过程降雨量大时,排土场边坡基底会出现滞水,安全系数受其影响大;逆排工艺形成的排土场边坡,基底滑动安全系数随着堆置台阶增加呈阶段式大幅下降;排土场边坡安全系数具有滞后效应,最危险的时刻出现在降雨停止后的一段时间。研究成果对排土场边坡的稳定分析具有理论与实际意义。At present, single safety factor is used for the stability assessment of waste-dump slopes, which is difficult to completely reflect the actual situation of evolving stability in the stacking process of waste-dump slopes. Concerning this problem, taking a waste-dump slope in Fujian as an object, on the basis of engineering geological conditions and meteorological data, the time-varying law of seepage and stability in different stages of whole stacking process under rainfall and evaporation are studied. The results show that waste-dump slope will appear a phenomenon of stagnant water under rainfall when the precipitation is larger, which can take a negative effect on security. As for a waste-dump processed inversely, the basal sliding safety factor is staged feli sharply with the increasing of piled up stairs. The safety factors of the waste-dump slopes possess hysteresis effect, and the most dangerous moment appears after the rain stops for a period of time. The results on stability have a theoretical and practical significance in the waste-dump slope.

关 键 词：排土场边坡 堆置过程 渗流 稳定性 时变分析 

分 类 号：TD854.6[矿业工程—金属矿开采]