开滦吕家坨井田八煤层古河流冲刷研究

Study on Paleochannel Washout of Coal Seam 8 in Lujiatuo Minefield, Kailuan

吕家 坨井 田 西翼 部分 区 域八 煤层 顶 板由 正常 的 粉砂 岩变 为 粗中 砂岩 ,并 有 煤层 变 薄 现 象。 通 过 对 岩煤 层 成分、结 构 、构 造及 所含 化 石特 征分 析 ,揭示 出 井田 内发 育 有古 河流 地 质构 造。并对 古河 流的 流 经区 域和 煤 层的 破坏 程度作 了研 究 ,为井 田 中深 部八 煤 层的 开采 提 供了 参考 依 据。

In the part of west flank of Lujiatuo minefield, the normal siltstone roof of coal seam 8 changed into coarse to medium-grained sandstone, and also had phenomenon of coal seam pinch-out. From analyses of rock and coal composition, texture, structure and fossil character, revealed that in the minefield has paleochannel passed through. And then studied the area channel flowed along and destructiveness to the coal seam, provide a reference for the mining of coal seam 8 in middle to deep part of the minefield.