Forecasting of water yield of deep-buried iron mine in Yanzhou, Shandong

This paper compares analytical and numerical methods by taking the forecasting of water yield of deep-buried iron mine in Yanzhou, Shandong as an example. Regarding the analytical method, the equation of infinite and bilateral water inflow boundary is used to forecast the water yield, and in the case of numerical simulation, we employed the GMS software to establish a model and further to forecast the water yield. On the one hand, through applying the analytical method, the maximum water yield of mine 1 500 m deep below the surface was calculated to be 13 645.17 m3/d; on the other hand, through adopting the numerical method, we obtained the predicted result of 3 816.16 m3/d. Meanwhile, by using the boundary generalization in the above-mentioned two methods, and through a comparative analysis of the actual hydro-geological conditions in this deep-buried mine, which also concerns the advantages and disadvantages of the two methods respectively, this paper draws the conclusion that the analytical method is only applicable in ideal conditions, but numerical method is eligible to be used in complex hydro-geological conditions. Therefore, it is more applicable to employ the numerical method to forecast water yield of deep-buried iron mine in Yanzhou, Shandong.

兖州市颜店矿区洪福寺铁矿床地质特征

洪福寺铁矿床处于济宁磁异常的北端,为隐伏矿床,埋深1000 m左右,赋存于新太古代济宁岩群浅变质岩中。该矿床发育11个铁矿体,矿体呈层状、似层状产出,产状与地层产状基本一致,探明的铁矿石资源量6.22亿t,平均品位TFe28.42%,mFe20.96%。矿床规模大、埋藏深,矿体形态和结构较简单,厚度较稳定,品位变化不大,矿石属于需选贫铁矿石。该矿床的勘探表明了分布于鲁西地区的新太古代济宁岩群存在较大规模的变质沉积铁矿,为该地区铁矿勘查开阔了空间。

山东省兖州市翟村铁矿床地质特征及成因探讨

翟村铁矿床位于山东省最大磁异常——济宁磁异常北部,为验证该异常,在该区通过物探、钻探等勘查方法进行地质找矿,圈定了44个矿体,共求得铁矿石(332)+(333)资源量超过10亿t,平均品位TFe31.09%,mFe22.44%,mFe/TFe的平均值为72.18%。该矿体赋存于新太古代济宁群变质岩中,上覆盖层为寒武纪至奥陶纪地层,矿体呈层状、似层状产出,产状与围岩一致。矿石的主要有用组分为Fe,矿石结构为自形—他形晶粒状结构、包含结构、碎斑结构;矿石构造主要为条带状构造、条带—稠密浸染状构造。铁矿的原始沉积或为近岸浅海陆架产物,沉积物中的火山物质较多,条带状硅铁建造是在热水环境中形成的,其成因类型属沉积变质型铁矿。济宁群浅变质岩是寻找该类型铁矿的有利层位,济宁群分布区是寻找该类型铁矿床的首选靶区。