厚松散层条件下地表采动裂缝宽度的计算方法

Calculation Method of the Surface Cracks Width Induced by Mining Under Thick Alluvium

地表采动裂缝是地下煤层开采引起地表采动损害的一种显现形式。限于研究手段和方法,目前对地表采动裂缝宽度的定量计算鲜有研究。基于实测资料,根据几何学原理推导了地表采动裂缝宽度的计算公式。与实测对比验证表明,该式计算结果与实测基本吻合。为煤矿区土地复垦工程量计算和土地损害程度提供了判断方法。

Surface crack is a kind of mining - induced damage. Due to research means and methods, there is few study on the quantita- tive calculation of the width of mining - induced surface cracks. In this article, based on the measured data, the surface crack width indeced by mining is deduced according to the geometry theory. Compared with the measured data, it shows that the calculated results coincide with the measured data, which provides the judgment method for the coal mining area land reclamation engineering and land damage degree.