摘要
地下采煤中三带（冒落带、裂隙带、弯曲带）高度的判断是预测采空引起地表变形破坏程度的依据。在诸多的影响因素中，煤层倾角是控制“三带”高度的最主要因素。建立在实测统计基础上的经验范围值用于“三带”高度的判断带有一定的人为性。急倾斜煤层中冒落带和裂隙带高度随煤层倾角变化的规律已被褐示［７］。通过弹塑性岩石材料的非线性有限元模拟，本文提出了利用应力重分布图判断中、缓倾角煤层采空区覆岩“三带”高度的方法，并应用于实际工程。
Determination of heights of three zones(inbreak, crack, and bent zones) of mined out area provides a basis for predicting deformatiom and fracture of earth′s surface. Among several factors,dip angle of coal seam is the most important factor affecting the height of the three zones. Determination of heights of three zones from experience data if of certain artificial character. Relationship between height of inbreak zone and fracture zone and dip angle of steeply dipping coal seam has been discussed. In the paper, a method for determination of heights of three zones through analsysing redistrbution of gragh of stress which if obataine from non linear finite element simulation in moderately and gently dipping seam is proposed. Then, we predict the heights of three zones in two by this method.
出处
《工程地质学报》
CSCD
1997年第3期211-217,共7页
Journal of Engineering Geology
关键词
冒落带
煤层
倾角
覆岩变形
岩层变形
Heights of Three Zones, Inclination of coal, Deformation and Damage of Earth Surface, Non linear Finite Element Simulation.
