1号露天矿是中部采选公司开采含铁石英岩的主要生产单位之一。该露天矿采深到500m的含铁石英岩含量为16亿t,并分布在由“苏共二十大”和“共产国际”两个矿井开采的富铁矿体上盘中的1～5层铁中(图1),因此1号露天矿有厚20～150m的铁矿层落入上述矿井开采的岩石移动带中, Open Pit No. 1 is one of the major production units for the production of ferrous quartzite by a central mining company. The open-pit mined iron-bearing quartzite at a depth of 500 m is 1.6 billion tons and is distributed in 1-5 of the top iron ore mines exploited by the two mines of the “CPSU” and “Comintern” (Figure 1). Therefore, the No. 1 open pit mine has an iron ore layer with a thickness of 20-150 m falling into the rock movement zone exploited by the above mine,