【摘要】 从平面形状、剖面形状、发育高度及中心轴变化方面,总结了华北煤田陷落柱的几何特征。在平面形状特征方面,以椭圆形为主;在剖面形状方面,以上小下大的圆锥状柱体为主。陷落柱的发育高度大小差别十分悬殊,几乎所有的陷落柱中心轴都会随地层深度的变化发生有规律的偏移。更多还原

【Abstract】 The geometrical characteristics of sunken column in North China Coalfield is summarized from the aspects of its planar shape, sectional shape,development height and axle center change, etc. The shape of most sunken columns presents ellipse in plan and circular cone in section. The height of sunken columns is a great disparity in size. Almost all the axle centers of sunken columns change in regularity with depth of strata.更多还原