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一、地质概况白云石露天矿的特点是:矿床较长,层厚,层位稳定,覆盖物表土层比较薄,多数白云岩明显露于地表。矿区白云岩属二叠系茅口灰岩,灰白色厚层状白云岩,岩质好,岩层出露厚度120～200米,倾向南西35°～73°,倾角27°。顶板是玄武岩,底板是灰白色厚层状硅质砂岩,含P_2O_5。采区有五条断层切割,其中F_1和F_2断层斜穿2~#硐,断距1.5米。断层对采区有一定的影响。
First, the geological overview Dolomite open-pit mine is characterized by: a long deposit, layer thickness, horizon stability, covering the surface layer is relatively thin, most of the dolomites were clearly exposed to the surface. The dolomite in the mining area belongs to the Permian Maokou limestone and thick gray-white dolomite. The rock quality is good. The thickness of the rock formation is 120-200 meters, with a tendency of 35 ° -73 ° and a dip of 27 °. The roof is basalt, the floor is gray thick layered siliceous sandstone, containing P_2O_5. There are five faults in the mining area, in which F_1 and F_2 faults obliquely penetrate through 2 ~ # and the fault has a distance of 1.5m. The fault has a certain impact on the mining area.