我矿为凹陷露天铁矿,采用单沟或组沟开拓、斜坡卷扬提升、岩石运往外部排土场的开采方法。由于矿石质量较好,露天生产剥采比较高,剥离量较大。过去岩石剥离用人工运输卸车排土,遍地堆积。这样,不但占用农地多,运距也逐渐加长,排土效率低,劳动强度大,排土费用高。在毛主席革命路线的指引下,为了改变这种排土现状,我们坚持独立自主、自力更生的方针,发动群众搞革新,成功地使用了造山排土方法。 I mine for the depression open-pit iron ore, the use of a single ditch or group of trench development, hoisting and upgrading of slopes, rock to the external dumps mining methods. Due to the better quality of ore, stripping open-air production is relatively high, large amount of stripping. In the past, the rock was peeled off and manually dumped and piled up. In this way, not only the occupation of farmland is more, the distance of transportation is also gradually lengthened, the efficiency of soil drainage is low, the labor intensity is high, and the cost of soil dumping is high. Under the guidance of Chairman Mao’s revolutionary line, in order to change the status quo, we adhered to the principle of independence, self-reliance and mobilized the masses to innovate and successfully used the method of making orphan dumping.