不规则形状地下空间开挖条件下地表沉陷预计方法研究

Method for Prediction of Surface Subsidence in Excavating Underground Rooms of Irregular Shape

地下工程施工或地下采矿导致地表沉陷,甚至造成突然坍塌或沿层面滑移等灾害事故。文中根据概率积分法的基本原理,基于褶曲构造地层、任意形状空间开挖条件下地表点在任意方向的移动与变形值预计方法,并顾及复杂地质和开挖等因素,推导出不规则形状地下空间开挖条件下地表移动与变形预计公式。由于地表沉陷预计公式都是不可积重积分式,因此,采用数值积分方法解算这些不能求出原函数的方程式和变积分限问题。

The surface subsidence is caused by underground constructing and mining.And the disastrous accidents on unexpected collage and landslide along bedding plane are probably led to occur.Based on the fundamental principle of the probability integration method and the methods for prediction of ground point's movement and deformation in all directions under folding structure strata and any shape of room,the basic factors in varied geology and excavating are comprehensively thought out.The for-mulas for predicting surface point's movement and deformation are derived under excavating underd rooms of irregular shape.Because the formulas for predicting surface subsidence can't be integrated,the numerical integral method is adopted to calculate the values of double integral and solve the problems of variable limits of integration.