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Destruction processes of mining on water environment in the mining area combining isotopic and hydrochemical tracer

机译：同位素和水化学示踪相结合的矿区水环境破坏采矿过程

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摘要

There is less research on the hydrological system and its destruction processes mechanism in the mining areas, especially combined application of isotope technology and chemical signals, which is a key scientific problem that need to be solved. This study takes Jinci spring area in Shanxi as a case study. It is based on the data of hydrology and mining condition from 1954 to 2015, combining monitoring experiments, O-18, D, S-34 and N-15 tracing, chemical and model simulation. This study investigates the hydrological regularity and impacts of mining activities on water quantity and quality, and reveals the destruction process of hydrological system. The results show that: (1) Water chemical type shows an evolutionary trend of HCO3--Ca2+- Mg2+- SO42-- HCO3--Ca2+-Mg2+- SO42--Ca2+-Mg2+, due to the influence of exploitation and fault zones. Isotope tracer shows that mine pit water is formed by a mixture of pore water, karst water and surface water. (2) Although precipitation and seepage have a certain impact on the reducing of groundwater quantity, over-exploitation of water resource is still the main reason for reducing of groundwater quantity. Under the conditions of keeping the exploitation intensity at the current level or reducing it by 10%, groundwater level shows a declining trend. Under the condition of reducing it by 30%, groundwater level starts to rise up. When reducing by 50%, groundwater level reaches its highest point. Coalmining changes the runoff, recharge and discharge paths. (3) From 1985 to 2015, Water quality in the mining area is worsening. Ca2+ increases by 35.30%, SO42- increases by 52.80%, and TDS (Total Dissolved Solid) increases by 67.50%. Nitrates come from the industrial and domestic wastewater, which is generated by mining. The percentage of groundwater coming from gypsum dissolusion is 67.51%, and the percentage from coal measure strata water is 34.49%. The water qualities of river branches are generally deteriorated. (C) 2018 Elsevier Ltd. All rights reserved.
机译：矿区水文系统及其破坏过程机理的研究较少，特别是同位素技术和化学信号的联合应用，这是需要解决的关键科学问题。本研究以山西晋spring春季地区为例。它基于1954年至2015年的水文和采矿条件数据，结合了监测实验，O-18，D，S-34和N-15示踪，化学和模型模拟。该研究调查了水文规律和采矿活动对水量和水质的影响，并揭示了水文系统的破坏过程。结果表明：（1）受开发影响，水化学类型呈现出HCO3--Ca2 +-> Mg2 +-> SO42-> HCO3--Ca2 + -Mg2 +-> SO42-Ca2 + -Mg2 +的演变趋势。和断层带。同位素示踪剂表明矿井水是由孔隙水，岩溶水和地表水的混合物形成的。 （2）虽然降水和渗流对减少地下水量有一定的影响，但水资源的过度开发仍是减少地下水量的主要原因。在将开采强度保持在当前水平或降低10％的条件下，地下水位呈下降趋势。在降低30％的条件下，地下水位开始上升。当减少50％时，地下水位达到最高点。煤矿改变了径流，补给和排出的路径。 （3）从1985年到2015年，矿区的水质在恶化。 Ca2 +增加35.30％，SO42-增加52.80％，TDS（总溶解固体）增加67.50％。硝酸盐来自采矿产生的工业和生活废水。来自石膏溶解的地下水比例为67.51％，来自煤系地层水的比例为34.49％。河流支流的水质普遍恶化。 （C）2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Environmental pollution》 |2018年第6期|356-365|共10页
  • 作者

    Yang Yonggang; Guo Tingting; Jiao Wentao;

  • 作者单位

    Shanxi Univ, Inst Loess Plateau, Taiyuan 030006, Shanxi, Peoples R China;

    Shanxi Univ, Coll Environm & Resource Sci, Taiyuan 030006, Shanxi, Peoples R China;

    Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mining; Isotope; Destruction processes; Water quantity; Water quality;

    机译：采矿;同位素;破坏过程;水量;水质;

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