摘要
针对煤矿建设阶段普遍存在的矿井水回灌至浅层地下含水层问题,以生态脆弱的毛乌素沙漠腹地某煤矿为研究对象,重点开展了高矿化度矿井水地下回灌的水质影响研究,结果表明:尽管矿井水中含有多种污染组分,但采用地下回灌方式,可以利用风积沙层的自然过滤净化作用,去除水中绝大部分NH_4、NO_3、COD、大肠杆菌等污染组分,大大增加了当地的水资源量,避免了二次污染和无效蒸发等问题。风积沙层中蕴含丰富的低矿化度地下水资源,在稀释作用下,可以有效降低矿井水中TDS浓度,回灌影响区域在80 m范围内,80 m以外的矿井水已成为可直接利用的地下水资源。建井阶段采用地表回灌,生产阶段建设地下水库,可以有效保护和利用矿井水资源,实现西部矿区的绿色可持续发展。
There were some unknown problems that underground water recharges to shallow aquifer during coal mine constructing;we researched the water quality influence of groundwater recharge with high salinity mine water by taking a coal mine in the hinterland of the ecologically fragile Mu Us desert as the research object. The results showed that aeolian sand was used as porous medium during mine water recharge, which can remove many pollution components（e.g. NH_4, NO_3, COD and escherichia coli）.Mine water underground recharge can increase the amount of water resources, avoid the secondary pollution and reduce ineffective evaporation. There is abundant and low salinity water resource in aeolian sand bed. Dilution effect effectively reduce the TDS concentration of mine water, and the influence range of high salinity mine water is within 80 m. The mine water can be directly used as groundwater resource. Both surface recharge during coal mine construction and underground reservoir during coal mine production can be used to effectively protect and utilize mine water to realize green sustainable development in western mining area.
作者
赵彩凤
杨建
ZHAO Caifeng1, YANG Jian1,2(1. China Coal Technology and Engineering Group Xi＇an Research Institute, Xi＇an 710054, China;2.Shaanxi Key Laboratory of Preventing and Controlling Coal Mine Water Hazard, Xi＇an 710054, Chin)
出处
《煤矿安全》
CAS
北大核心
2018年第3期29-32,共4页
Safety in Coal Mines
基金
国家重点研发计划资助项目(2016YFC0501104)
煤炭开采水资源保护与利用国家重点实验室开放基金资助项目(SHJT-16-30.10)
中煤科工集团西安研究院有限公司创新基金面上资助项目(2015XAYMS18)
关键词
高矿化度
矿井水
地下回灌
风积沙层
稀释作用
high salinity
mine water
groundwater recharge
aeolian sand bed
dilution effect
