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十多年来,海城滑石矿对60年代以前的采空区矿柱进行了回收,共采出矿石115万吨,取得较好的经济效果。本文以一号矿体为例,介绍如下。一、概述一号矿体长300余米,上宽下窄,平均水平厚度80米(最大水平厚度150米),系中低温热液交代型矿床。矿体走向近东西,倾向南,倾角35～45°,含煌斑岩、硅化大理岩夹层。顶、底板均为菱镁岩。靠近顶、底板为滑石化菱镁岩,矿、岩界线不明显。滑石多为片状,灰白色及粉红色,手感滑腻,疏水性较强,摩氏系数1～3,主要有益成份
For more than a decade, Haicheng talc mine has recovered pillars of the goaf before the 1960s and collected a total of 1.15 million tons of ore, achieving good economic results. In this paper, an ore body, for example, described below. First, an overview of No. 1 ore body more than 300 meters long, wide on the narrow, the average thickness of 80 meters (maximum horizontal thickness of 150 meters), the Department of low-temperature hydrothermal interchange deposit. The orebodies are close to the east and west, with a dip of 35 ~ 45 °, including lamprophyre and silicified marble intercalations. Top, floor are magnesite. Close to the top, the floor of the talcification magnesite, ore, rock boundary is not obvious. Talc mostly flaky, gray and pink, feel creamy, hydrophobic, Mohs coefficient of 1 to 3, the main beneficial ingredients