为研究不同干湿循环次数对破碎砂岩水化学特征的影响,以豹子沟矿 10203 工作面为例,开展顶板破碎砂岩水岩作用实验.研究结果表明,随着干湿循环次数的增大,矿井水阴、阳离子置换作用增强,Na++K+、HCO3-、CO32-呈正相关的趋势,Ca2+反之,长石矿物溶蚀-沉淀效应增强,矿井水化学类型由SO4-Ca逐渐转化为HCO3-Na类型.研究结果可为废弃矿井建设抽水蓄能电站采空区水化学评估提供借鉴.
To study the effect of different wet dry cycles on the hydrochemical characteristics of fractured sandstone,a water rock interaction experiment was conducted on the 10203 working face of Baozigou Mine as an example.The research results indicate that as the number of wet and dry cycles increases,the displacement of anions and cations in mine water is enhanced.Na++K+,HCO3-,and CO32-show a positive correlation trend,while Ca2+is the opposite.The dissolution precipitation effect of feldspar minerals is enhanced,and the chemical type of mine water gradually transforms from SO4-Ca to HCO3-Na type.The research results can provide reference for the hydrochemical evaluation of goaf in abandoned mine construction of pumped storage power stations.