矿井水深部转移水文地球化学变化模拟研究--以鄂尔多斯盆地东北部为例  

Simulation Study on Mine Water Depths Transfer Hydrogeochemical Variation——A Case Study of Northeastern Ordos Basin

作　　者：胡荣华[1] Hu Ronghua(Jiangsu Design Institute of Geology for Mineral Resources,Xuzhou,Jiangsu 221000)

机构地区：[1]江苏地质矿产设计研究院,江苏徐州221000

出　　处：《中国煤炭地质》2022年第6期29-33,62,共6页Coal Geology of China

基　　金：中国煤炭地质总局科技创新项目“矿井水深井回灌目的层可注性研究”(ZMKJ-2020-J03-3)。

摘　　要：煤矿的矿井水处置是矿井生产过程难题之一。矿井水深井回灌避免了水资源的浪费,降低了深度水处理的高额成本,做到了煤-水双资源开发利用,是非常有前景的应用模式。矿井水回灌过程中,在目的含水层与原地层地下水和含水层介质发生的水化学变化以及矿物相溶解沉淀平衡等因素都是影响回灌效果的重要方面。以鄂尔多斯盆地某矿刘家沟组为回灌目的层,模拟了矿井水回灌过程中可能发生的化学反应,应用PHREEQC软件对矿井水回灌的全过程进行混合模拟和水岩作用正向模拟。结果发现,在回注过程中主要有Ca^(2+)和SO_(4)^(2-)等发生沉淀,产生方解石、白云石和重晶石等矿物沉淀。通过温度变化的单一变量模拟,发现在一定温度变化范围内,温度升高使方解石和白云石等碳酸盐岩矿物沉淀量增加,重晶石等硫酸盐岩类矿物沉淀量减少。Coalmine water disposal is one of hard nuts in mine production process.Mine water deep well recharge has avoided waste of water resources,reduced high cost in meticulous water processing,managed coal-water dual resources exploitation and utilization,thus a very good prospect application mode.During the mine water recharge process,the target aquifer and original strata groundwater,aquifer media generated hydrochemical variation and mineral phase dissolution-precipitation equilibriumetcfactors are all major aspects impacting recharge effect.Taking the Liujiagou Formation in an Ordos Basin coalmine as the recharge zone of interest has simulated possible chemical reactions during the recharge process,taken the software PHREEQC has carried out mine water recharge overall process hybrid simulation and water-rock interaction forward simulation.The result has shown that during the recharge process mainly have Ca^(2+),SO_(4)^(2-) etc precipitated and produced calcite,dolomite and barite etc mineral precipitations.Through temperature variation single variable simulation obtained:within certain temperature variation range,temperature rising can make calcite and dolomite etc carbonate minerals precipitation capacity increase,barite etc sulfate minerals decrease.

关 键 词：矿井水利用 水文地球化学 PHREEQC 模拟 

分 类 号：P641[天文地球—地质矿产勘探]