基于GDEM的采空区地表移动变形对邻近建设场地影响研究  

Effect of the Ground Subsidence above the Abandoned Mine Gallery on an Adjacent Construction Site by Using GDEM Software

作　　者：王金祥 徐建城 江巍[1,2] 张皓然 付钊宇 WANG Jinxiang;XU Jiancheng;JIANG Wei;ZHANG Haoran;FU Zhaoyu(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,Yichang 443002;Hubei Key Laboratoryof Disaster Prevention and Mitigation,Yichang 443002;HubeiE'XiGeologicalDesignCo.Ltd.,Yichang443100)

机构地区：[1]三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [2]防灾减灾湖北省重点实验室,湖北宜昌443002 [3]湖北鄂西地质设计有限公司,宜昌443100

出　　处：《土工基础》2024年第2期287-293,298,共8页Soil Engineering and Foundation

基　　金：国家自然科学基金项目(编号:52079070);防灾减灾湖北省重点实验室开放基金资助项目(2022KJZ07)。

摘　　要：安全利用采空区场地是城市拓展发展空间的有效途径之一,而评价采空区地表移动变形对建设场地的影响是基础工作,但传统方法在分析矿层倾斜、存在断层和地表起伏等复杂条件下的采空区地表移动变形时能力不足。以湖北荆门某石膏矿采空区为研究对象,采用连续-非连续数值分析方法的GDEM软件数值模拟分析地表移动变形,评价对邻近建设场地的影响。然后在不同的矿层倾角、断层赋存等条件下构建数值模型,分析地表移动变形并比较其对建设场地影响。分析结果表明,矿层倾向背离建设用地时采空区地表移动变形的影响明显小于矿层倾向指向建设用地时,倾角越大则影响范围越小。断层倾向背离建设用地时采空区地表移动变形对建设用地的影响小于无断层时,断层倾向指向建设用地时则效果相反。The safe utilizing the abandoned mine voids site is an efficient approach to expand the available development space for the city,in which an elementary work is to estimate the effect of the ground subsidence on the adjacent construction site.The classical ways are deficient in the surface movement and deformation analysis above the abandoned mine voids under the complicated geological conditions,such as inclined seams,faults and a relief surface.This paper presents a case history of the abandoned gypsum mine goaf in Jinmen,Hubei.The GDEM software which is used based on the continuum and non-continuum numerical method is employed in the analysis of the ground subsidence.Then the effect of the goaf on the adjacent construction site is evaluated.Furthermore,numerical models with various inclined angles for seams and different faults are established.Their surface movement and deformation are acquired,and the effects on the construction site are compared.Results show that the seams dipping opposite to the site has less effect than the seams dipping towards the site.And the influence zone becomes small with the inclined angle of seam increasing.The ground subsidence where the fault dips opposite to the site has less effect than where no fault occurs.And the fault dipping towards the site has more effect.

关 键 词：GDEM 地表移动变形 建设场地 倾角 断层 

分 类 号：TU443[建筑科学—岩土工程]