生态护坡结构在稀土矿山滑坡防治中的应用研究
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摘要
针对离子型稀土矿山原地浸矿开采方式容易诱导滑坡的特点,提出一种以竹子为主要材料,由竹子格构框架,竹桩和竹子排水管共同组成的生态护坡结构。在Midas GTS NX软件中,利用强度折减法对龙南县某一稀土矿山边坡进行支护前后的稳定性模拟分析,评价支护效果。结果表明:支护后,在自然工况条件下,边坡稳定性系数从2.400上升到2.931;在施加流量为2cm/min的浸矿强度后,边坡稳定性系数从1.277上升到1.775。选取一废弃的稀土矿山边坡进行现场实施,发现再经历6个月的生长周期之后,坡体被草木覆盖,无水土流失和边坡失稳现象发生。因此认为此生态护坡结构达到了预期的支护效果。
In view of the characteristics that in-situ leaching mining in ion-type rare earth mines is easy to induce landslides,an ecological slope protection structure with bamboo as the main material was proposed to support the slope.The structure consisted of bamboo lattice frame,bamboo pile and bamboo drainage pipe.In Madas GTS NX software,the strength reduction method was used to simulate the stability of a rare earth mine slope in Longnan before and after support,and to evaluate the support effect.The results showed that under natural conditions,the slope stability coefficient increased from 2.400 to 2.931 after support,and increased from 1.277 to 1.775 after applying leaching strength with a flow rate of2 cm/min.An abandoned rare earth mine slope was selected for site implementation.It was found that after 6 months of growth period,the slope was covered by vegetation,and there was no soil erosion and slope instability.Therefore,it was considered that the ecological slope protection structure achieved the expected supporting effect.
In view of the characteristics that in-situ leaching mining in ion-type rare earth mines is easy to induce landslides,an ecological slope protection structure with bamboo as the main material was proposed to support the slope.The structure consisted of bamboo lattice frame,bamboo pile and bamboo drainage pipe.In Madas GTS NX software,the strength reduction method was used to simulate the stability of a rare earth mine slope in Longnan before and after support,and to evaluate the support effect.The results showed that under natural conditions,the slope stability coefficient increased from 2.400 to 2.931 after support,and increased from 1.277 to 1.775 after applying leaching strength with a flow rate of2 cm/min.An abandoned rare earth mine slope was selected for site implementation.It was found that after 6 months of growth period,the slope was covered by vegetation,and there was no soil erosion and slope instability.Therefore,it was considered that the ecological slope protection structure achieved the expected supporting effect.
引文
[1]李永欣,王晓军,黄广黎,等.离子型稀土浸矿过程渗透率与黏聚力的关系研究[J].矿业研究与开发,2018,38(1):24-27.
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[7]杨麒麟,李柏.滑坡区毛竹根系生长分布及其护坡效果研究[J].长江科学院院报,2017,34(10):45-49.
[8]陈潮,张俊云,赵晓黎,等.植物根系生长形态对边坡浅层稳定性影响数值研究[J].长江科学院院报,2017,34(4):126-130+135.
[9]卜宗举.植被根系浅层加筋作用对边坡稳定性的影响[J].北京交通大学学报,2016,40(3):55-60.
[10]龙凤,李绍才,孙海龙,等.岩石边坡生态护坡效果评价指标体系及应用[J].岩石力学与工程学报,2009,28(S1):3095-3101.
[11]杨阳,杨建英,赵平,等.两种框格梁生态护坡技术及其应用效果---以安徽岳武高速公路为例[J].中国水土保持科学,2015,13(5):118-124.
[2]罗嗣海,袁磊,王观石,等.浸矿对离子型稀土矿强度影响的试验研究[J].有色金属科学与工程,2013,4(3):58-61.
[3]王晓军,李永欣,黄广黎,等.浸矿过程离子型稀土矿孔隙结构演化规律研究[J].中国稀土学报,2017,35(4):528-536.
[4]黄广黎,王晓军,李永欣,等.离子型稀土浸矿过程矿样力学特性演化规律[J].金属矿山,2018(2):50-55.
[5]李永欣,王晓军,黄广黎,等.离子型稀土浸矿过程渗透率与黏聚力的关系研究[J].矿业研究与开发,2018,38(1):24-27.
[6]吴开兴,张恋,朱平,等.离子型稀土矿石颗粒粒度分布及变化规律研究[J].稀土,2016,37(3):67-74.
[7]杨麒麟,李柏.滑坡区毛竹根系生长分布及其护坡效果研究[J].长江科学院院报,2017,34(10):45-49.
[8]陈潮,张俊云,赵晓黎,等.植物根系生长形态对边坡浅层稳定性影响数值研究[J].长江科学院院报,2017,34(4):126-130+135.
[9]卜宗举.植被根系浅层加筋作用对边坡稳定性的影响[J].北京交通大学学报,2016,40(3):55-60.
[10]龙凤,李绍才,孙海龙,等.岩石边坡生态护坡效果评价指标体系及应用[J].岩石力学与工程学报,2009,28(S1):3095-3101.
[11]杨阳,杨建英,赵平,等.两种框格梁生态护坡技术及其应用效果---以安徽岳武高速公路为例[J].中国水土保持科学,2015,13(5):118-124.