关键词: 开采沉陷, 地表建(构)筑物, 移动变形, 采空区, 概率积分法

Abstract: The surface movement and deformation above the goaf will seriously affect the safety of nearby structures. In order to analyze the failure types of buildings (structures) caused by surface movement and deformation,and to clarify the influence of surface subsidence,inclination and curvature on buildings (structures),based on probability integral method,taking 3307 working face of a mine in Northern Jining as an example,combined with measured displacement results and FLAC3D numerical simulation,the rules of surface movement and deformation were analyzed. The safety analysis of surface structures is also carried out. The study results show that:① With the advance of the working face,the surface subsidence increases gradually. When the length of the goaf reaches twice the influence radius,the lowest position of the surface basin begins to hit the bottom,and the subsidence reaches the maximum. As the working face continues to advance,the surface basin size continues to expand,and the maximum subsidence value no longer increases. ② The mining depth has an important influence on the shape of the surface basin. When the mining depth is small,the surface basin is approximately the shape of the mining face,and with the increase of the mining depth,the surface basin gradually approaches to the oval shape. ③ The surface deformation law of 3307 working face is analyzed,and the measured results are compared with the theoretical calculation results. The error between them is less than 5%,which proves the rationality of the theoretical calculation results.

Key words: mining subsidence,surface buildings (structures),movement deformation,goaf,probability integral method