地学前缘 ›› 2018, Vol. 25 ›› Issue (1): 276-285.DOI: 10.13745/j.esf.yx.2017-02-4

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周边采煤活动对岳城水库库区大坝和坝基的渗流影响研究

王卓然，武雄   

  1. 中国地质大学(北京) 水资源与环境学院, 北京 100083
  • 收稿日期:2016-04-07 修回日期:2017-01-07 出版日期:2018-01-15 发布日期:2018-01-15
  • 作者简介:王卓然(1989—)，女，博士研究生，地质环境与工程专业。E-mail:616736531@qq.com
  • 基金资助:
    中央高校基本科研业务费专项(2652015125)；国家自然科学基金项目(41572227)；国土资源部公益性行业科研专项(201511056-3)

A study of the impact of mining activities on the seepage of the dam and dam foundation of Yuecheng Reservoir

WANG Zhuoran,WU Xiong   

  1. School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083, China
  • Received:2016-04-07 Revised:2017-01-07 Online:2018-01-15 Published:2018-01-15

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摘要： 岳城水库属于国家重点水库，同时库区及周边地下是典型的富煤区域，蕴藏着大量优质煤炭资源。为研究周边采煤活动对岳城水库库区大坝和坝基的渗流影响，文中以坝体作为研究对象，在上游建立一条安全限，通过控制大坝和坝基的有效保护边界来控制开采对浅地表造成的影响深度和影响远度。通过数值模拟，结果表明在上游水位159.1 m和下游水位105.0 m的作用下，只要开采影响范围距离岳城水库大坝2 000 m，开采就不会对大坝和坝基的渗透性变化产生影响；同时，也不会对坝肩的渗透性产生影响。

关键词: 煤矿开采保护边界, 饱和非饱和渗流, 有限元模拟

Abstract:  Yuecheng Reservoir belongs to the national key reservoir, while the reservoir area and the surrounding ground is a typical coalrich region, covering a large number of highquality coal resources. In order to study the impact of mining activities on the seepage of the dam and dam foundation, the dam was used as the research object and a safety limit in the upstream was set in this paper. By controlling the effective protection boundary of the dam and foundation, the impact depth and the impact degree of the mining on the shallow surface were controlled. The numerical simulation results showed that under the condition that the water level was 105.0 m upstream, 159.1 m downstream and the exploration impact distance was 2000 meters away from the dam, mining activities would not affect the permeability of the dam and the foundation. At the same time, it would not affect the permeability of the dam shoulder as well.

Key words:  coal mining protection boundary, saturatedunsaturated seepage flow, finite element simulation

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