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.
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。
A discussion on the distribution law of outburst seam in the two walls of the normal fault has a certain apocalypse to the geology.
讨论正断层两盘突出煤体的分布规律对于构造地质学也具有一定的启示。
A discussion on the distribution law of outburst seam in the two walls of the normal fault has a certain apocalypse to the geology.
讨论正断层两盘突出煤体的分布规律对于构造地质学也具有一定的启示。
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