群矿开采驱动下盆地尺度地下水循环模式
投稿时间:2017-03-15  修订日期:2017-06-06  点此下载全文
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作者单位E-mail
代锋刚 河北地质大学 daifenggang@126.com 
张发旺 中国地质科学院岩溶地质研究所  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:煤炭开采导致区域含水层结构破坏,已经严重影响了区域地下水循环演化态势,是煤矿区地下水资源短缺的根本原因。本文以长治盆地潞安矿区为例,通过野外调查、相似材料模拟实验和数值模拟手段,分析了群矿开采驱动下含水层结构破坏对地下水流场的影响。通过砂槽模拟试验结果和数值模拟结果进行对比验证,结果表明:1)煤层开采形成采动裂隙发育基本限制在完整基岩内,使得隔水底板粘土岩发生弯曲变形,承压含水层水位下降形成层间疏干区,对第四系潜水含水层流场影响甚微,潜水水位没有明显下降;2)隔水层有效厚度变薄局部地区,由于采动裂隙切穿隔水岩层,导致该区潜水含水层消失;3)同时采煤造成的类似“溯源侵蚀”,引发原本隔离的地下水系统间的地下水袭夺现象,矿井水补给量适当增加。
中文关键词:计算机模拟  物理模拟  相似材料模型  群矿开采  含水层结构
 
The New Pattern of groundwater Circulation under the Drive of Multiple Coal Mining
Abstract:Multiple coal mining lead to regional aquifer structure damage, which has seriously affected the regional groundwater circulation evolution trend, it is the root cause of the coal mining area groundwater resource shortage. Take Changzhi basin LuAn mining area as an example, through field investigation, similar material simulation and numerical simulation method, analyzed under the drive of multiple coal mining damage aquifer structure and its influence on groundwater circulation. Through sand tank simulation test results were compared with the results of numerical simulation, the results show that the fissure development form coal mining basic restricted to complete bedrock, makes the water bottom clay rock bending deformation, forming interlayer drainage area, has little impact damage to Quaternary unconfined aquifer structure; Effective thickness of water-resisting layer thinner parts, due to mining fissure cutting wear waterproof layers, lead to the unconfined aquifer disappear; Artificial "headward erosion" caused by coal mining at the same time, cause the abstraction phenomenon of groundwater between the original isolation groundwater system, mine water recharge appropriately increased.
keywords:computer simulation, physical simulation, similar material model,multiple coal mining,aquifer structure damage
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