一、基本情况我矿自1963年开始进入薄煤层开采,到1974年全部开采太原组薄煤层,主要可采煤层为七、九、十共三层。其中七层煤平均厚度0.9米,内含结核状黄铁矿,顶底板均为砂质页岩,地质构造复杂,顶板较破碎;九层煤平均厚度0.8米,顶板为石灰岩底板为砂 First, the basic situation I mine since 1963 into the thin seam mining, mining all of the Taiyuan thin coal seam in 1974, the main coal seam for the seven, nine, ten total of three. Among them, the average thickness of seven layers of coal is 0.9m, which contains nodular pyrite. The top and bottom plates are all sandy shales. The geological structure is complicated and the top plate is fragmented. The average thickness of nine layers of coal is 0.8m. The top plate is limestone with bottom plate of sand