| 鬃岭高位滑坡带地下水补径排特征及致灾作用研究 |
| |
| 引用本文： | 易连兴.鬃岭高位滑坡带地下水补径排特征及致灾作用研究[J].中国岩溶,2020,39(4):559-566. |
| |
| 作者姓名： | 易连兴 |
| |
| 作者单位： | 中国地质科学院岩溶地质研究所／自然资源部、广西岩溶动力学重点实验室 |
| |
| 基金项目： | 国家重点研发计划项目“岩溶山区特大滑坡成灾模式与风险防范技术”（2018YFC1504800）和课题一“岩溶山区岩溶过程与孕灾机理”（2018YFC1504801） |
| |
| 摘 要： | 本文以贵州省纳雍县鬃岭崩塌滑坡带两个滑坡区为例，通过水文地质调查、水动力场分析、水化学和流量动态对比分析，得出结论（1）天然条件下，崩塌滑坡带存在3个相对独立的地下水系统，采煤活动改变了局部地下水径流排泄方向，使上部基岩裂隙水、中部岩溶水补给到下部基岩裂隙水中，最后从坑道或泉排泄出地表。（2）流量动态和钙离子含量变化表明，雨季中部岩溶水灌入式补给到了采空区坑道中，同时也表明老鬃岭镇滑坡区山体浅部垂直裂缝发育，左家寨滑坡区山体浅部至深部垂直裂缝均有发育。（3）鬃岭崩塌滑坡体内部地下水以非饱和水下渗运动为主，不存在饱和地下水流场，故而不存在水动力驱动滑坡影响作用。（4）在鬃岭崩塌滑坡孕灾或灾害触发过程中，地下水对垂直裂缝、滑动结构面的发展和岩体破坏、失稳主要起到加速和促进作用。本文对岩溶石山地区类似滑坡机理研究有一定意义。
|
| 关 键 词： | 岩溶石山 高位滑坡 非饱和地下水 致灾作用 钙离子 |
Characteristics and the hazard-inducing effect of groundwater systems in Zongling high-level landslide areas |
| |
| Yi Lianxing.Characteristics and the hazard-inducing effect of groundwater systems in Zongling high-level landslide areas[J].Carsologica Sinica,2020,39(4):559-566. |
| |
| Authors: | Yi Lianxing |
| |
| Institution: | Institute of Karst Geology， CAGS， Key Laboratory of Karst Dynamics，MNR＆GZAR |
| |
| Abstract: | Taking two landslide areas of the Zongling collapse-landslide zone in Nayong county， Guizhou province as examples， this work conducted hydrogeological surveys， hydrodynamic field analysis， hydrochemistry research and flow dynamic comparative analysis to examine the hazard-inducing effect of groundwater. Results show that， （1） under natural conditions， there are three relatively independent groundwater systems in the collapse-landslide zone， while coal mining activities have changed the groundwater runoff-discharge direction， making the upper bedrock fissure water and middle karst water recharge into the lower bedrock fissure water， finally discharging to the surface from the pit or spring； （2） Flow dynamics and the variation of calcium ion content indicate that middle karst water in the rainy season recharges into the goaf tunnel in a injection form. They also show that vertical fractures developed in the shallow part of the slope body in the old Zongling town landslide area， as well as in the shallow to deep part of the slope body in the Zuojiazhai landslide area； （3） The groundwater flow in the Zongling landslide body is dominated by unsaturated groundwater seepage movement， no saturated groundwater flow field， thus no effect of the hydrodynamic driving landslides； （4） In the process of hazard initiation or triggering of the collapses and landslides in the Zongling area， groundwater plays a major role in accelerating and promoting development of vertical fractures and sliding structural plane， rock mass failure and instability. These research results are of certain significance to studies of the mechanism of collapses-landslides in the Zongling area and other karst mountainous areas with similar conditions in southwest China. |
| |
| Keywords: | |
|
| 点击此处可从《中国岩溶》浏览原始摘要信息 |
| 点击此处可从《中国岩溶》下载免费的PDF全文 |
