老采空区地表残余变形分析与地基稳定性评价——以徐州市庞庄煤矿为例  

Analysis on Surface Ground Residue Deformation of Old Goaf and Evaluation of Foundation Stability:A Case Study of Pangzhuang Coal Mine in Xuzhou City

作　　者：马荣 秦云虎 张雷 胡荣华 MA Rong;QIN Yunhu;ZHANG Lei;HU Ronghua(Jiangsu Design Institute of Geology for Mineral Resources,Xuzhou,Jiangsu 221006;CNACG Key Laboratory of Mineral Resource in Coal Measures,Xuzhou,Jiangsu 221006)

机构地区：[1]江苏地质矿产设计研究院(中国煤炭地质总局检测中心),江苏徐州221006 [2]中国煤炭地质总局煤系矿产资源重点实验室,江苏徐州221006

出　　处：《中国煤炭地质》2024年第8期57-61,共5页Coal Geology of China

基　　金：中国煤炭地质总局科技创新项目(ZMKJ-2022-JBGS01),徐州市重点研发计划(社会发展KC20059)。

摘　　要：为合理开发采空区上部土地资源,以徐州市庞庄煤矿某场地为例,通过研究区西部对煤层采空区工程地质条件和上覆岩层变形机理的分析,用概率积分法和采沉陷预计系统MSPS,对研究区下伏采空区地表沉陷的下沉值、倾斜值、水平移动值、水平变形值、曲率变形值进行计算预测,分析评价残余变形量的稳定性,绘制地表变形参数的等值线图,并对建筑地基稳定性进行评价。研究结果表明:研究区下伏采空区地面下沉变形已趋稳定,地表残余沉降变形小于建筑物临界变形,采空区上部建筑荷载变形影响深度与导水裂缝带的距离较大,不会直接引起老采空区“活化”,但采空区地下水恢复可能有导致老采空区“活化”的风险,在建筑施工时,应采取必要措施。In order to reasonably develop the land resources in the upper part of the goaf,taking a certain site of Pangzhuang coal mine in Xuzhou City as an example,this study analyzes the engineering geological conditions and deformation mechanism of the overlying strata in the western part of the study area.Using probability-integral method and mining subsidence prediction system MSPS,the subsidence value,inclination value,horizontal movement value,horizontal deformation value,and curvature deformation value of the surface subsidence in the goaf of the study area are calculated and predicted.The stability of residual deformation,draw contour maps of surface deformation parameters are analyzed and evaluated.The research results indicate that the ground subsidence deformation in the underlying goaf of the study area has become stable,and the residual surface settlement deformation is less than the critical deformation of the building.The depth of the influence of the upper building load deformation in the goaf is greater than the distance from the water conducting crack zone,and it will not directly cause the activation of the old goaf.However,the restoration of groundwater in the goaf may pose a risk of activation,and necessary measures should be taken during construction.

关 键 词：土地利用 煤矿老采空区 地基稳定性 残余变形 庞庄煤矿 

分 类 号：TD7[矿业工程—矿井通风与安全]