华北隐伏型煤矿深部含水层补给源水化学与同位素示踪

doi:10.13249/j.cnki.sgs.2013.06.755

地理科学 ›› 2013, Vol. 33 ›› Issue (6): 755-762.doi: 10.13249/j.cnki.sgs.2013.06.755

华北隐伏型煤矿深部含水层补给源水化学与同位素示踪

陈陆望(), 殷晓曦, 刘鑫

合肥工业大学资源与环境工程学院,安徽合肥 230009

收稿日期:2012-10-09 修回日期:2013-03-15 出版日期:2013-08-20 发布日期:2013-08-20
作者简介:
作者简介：陈陆望(1973-),男,湖北蕲春人,博士,副教授,主要从事水文地球化学研究。E-mail:luwangchen8888@163.com
基金资助:
国家自然科学基金面上项目(41173106)、安徽省自然科学基金项目（1308085ME61）资助

Tracing of Recharge Sources of Deep Aquifers in the Concealed Type Colliery of North China by Hydrochemistry and Isotopes

Lu-wang CHEN(), Xiao-xi YIN, Xin LIU

School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China

Received:2012-10-09 Revised:2013-03-15 Online:2013-08-20 Published:2013-08-20

摘要/Abstract

摘要：

为了阐明华北隐伏型煤矿深部含水层补给条件,以淮北煤田临涣矿区任楼煤矿为例,采用水化学系统聚类分析与氢氧同位素示踪技术,结合采矿活动影响,分析与探讨煤矿深部含水层中的地下水补给源及其变化机制。研究表明：矿区深层地下水形成机制为大气降水直接但不均匀入渗、滞留入渗以及古地下水混合。矿区深层地下水当总溶解固体（TDS）小于1 000 mg/L时,氢氧稳定同位素组成（δ值）随着TDS的增大而减小;当TDS大于1 000 mg/L时,δ值在平均值线附近。矿区深层地下水平均δD与δ¹⁸O分别为-67.4‰与-8.68‰,小于大气降水年平均δD与δ¹⁸O（δD=-52.4‰,δ¹⁸O=-7.80‰）。在未经采矿活动影响下,矿区深层地下水主要来源于大气降水直接但不均匀入渗补给形成的;经采矿活动影响后深部含水层长期向采空区充水,原地下水循环条件已被打破,在补给区水力交替加快,滞留于地表或土壤层的大气降水补给深部含水层。

关键词: 隐伏型煤矿, 水化学, 同位素, 深层地下水, 补给源

Abstract:

In order to find out the recharge condition in deep aquifers in the concealed type colliery in the north of China, taking Renlou colliery and the local Linhuan coal-mining district for example, hydrochemical systemic cluster analysis and hydrogen and oxygen isotopes tracing were carried out to discuss and analyze the recharge sources and its changing mechanism in the deep aquifers under the influence of mining activities. The deep groundwater of the coal-mining district was composed of direct but nonuniform infiltration and retention infiltration of precipitation and ancient underground water. In the case of TDS of deep groundwater at less than 1 000 mg/L, the δ values of stable hydrogen (D) and oxygen isotopes (¹⁸O) decreased with the increase of TDS in the coal-mining district. However, in the case of TDS of deep groundwater at higher than 1 000 mg/L, the δ values were around the average ones. In addition, the average δ values of D and ¹⁸O were -67.4‰ and -8.68‰ respectively, being relatively small compared with that of precipitation in the coal-mining district. Without the influence of mining activities, the deep groundwater of the coal-mining district was formed by the direct but nonuniform infiltration of precipitation. However, under the influence of mining activities, the deep groundwater of the coal-mining district was formed by the retention infiltration of precipitation, because mining activities had broken the original circulation condition of deep groundwater and the hydraulic alternate had been accelerated in the recharge area.

Key words: concealed type colliery, hydrochemistry, isotope, deep groundwater, recharge source

中图分类号:

P641.3

陈陆望, 殷晓曦, 刘鑫. 华北隐伏型煤矿深部含水层补给源水化学与同位素示踪[J]. 地理科学, 2013, 33(6): 755-762.

Lu-wang CHEN, Xiao-xi YIN, Xin LIU. Tracing of Recharge Sources of Deep Aquifers in the Concealed Type Colliery of North China by Hydrochemistry and Isotopes[J]. SCIENTIA GEOGRAPHICA SINICA, 2013, 33(6): 755-762.

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华北隐伏型煤矿深部含水层补给源水化学与同位素示踪

Tracing of Recharge Sources of Deep Aquifers in the Concealed Type Colliery of North China by Hydrochemistry and Isotopes

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