采空区地表变形对既有砌体结构影响分析

煤炭开采沉陷区的较大地表变形（倾斜、水平变形和曲率）会对既有砌体房屋造成倾斜、裂缝或倒塌等破坏。在总结“三下”压煤现状的基础上，根据拟建矿区具体的地质条件和开采条件预估算各种地表变形值，用ANSYS有限元整体模型思想建立典型多层砌体结构，分析砌体结构在拟建矿区开采沉陷导致地表整体倾斜、水平受拉变形和不均匀沉降情况下的墙体受力情况，并与在正常工作状态下的墙体受力情况做对比，总结各工况下墙体的受力特点，对采空区砌体结构的抗变形提出建议。

Analysis of the effect that the surface deformation of goaf generates to the existing masonry structure

The biggish surface deformation of subsidence area of coal mining(inclination,horizontal deformation and curvature) will destroy the existing masonry buildings,such as inclination,crack and collapse,etc.On the basis of summarizing the current situation of coal under the "three",all kinds of surface deformation value according to the concrete geologic conditions and mining conditions of the proposed mine lot are estimated.Typical multistory masonry structure by using the ideology of ANSYS finite element whole model is establised.The force conditions of the masonry structure’s wall in the situation of surficial whole inclination,horizontal and tensile deformation,differential settlement caused by mining subsidence in the proposed mine lot are analyzed.The force conditions of the wall in normal work condition is compared.The force characteristics in all kinds of working condition is summarized.Some suggestions on anti-deformation of masonry structure in goaf are put forward.