充填开采对地表建筑物稳定性影响研究  

Study on Influence of Backfill Mining on Stability of Surface Buildingsm2

作　　者：徐阳 徐良骥[1,3] 刘潇鹏 张坤 XU Yang;XU Liangji;LIU Xiaopeng;ZHANG Kun(School of Spatial Informatics and Geomatics Engineering,Anhui University of Science and Technology,Huainan 232001,China;Coal Industry Engineering Research Center of Mining Area Environmental and Disaster Cooperative Monitoring,Anhui University of Science and Technology,Huainan 232001,China;State Key Laboratory of Deep Coal Mining Response and Disaster Prevention and Control,Huainan 232001,China)

机构地区：[1]安徽理工大学空间信息与测绘工程学院,安徽淮南232001 [2]安徽理工大学、矿区环境与灾害协同监测煤炭行业工程研究中心,安徽淮南232001 [3]深部煤矿采动响应与灾害防控国家重点实验室,安徽淮南232001

出　　处：《煤炭技术》2023年第4期38-42,共5页Coal Technology

基　　金：国家自然科学基金项目(41472323);安徽省重点研发计划项目(201904b11020015);淮南市科技计划项目(2021130);深部煤矿采动响应与灾害防控国家重点实验室开放基金项目(SKLMRDPC21KF19)。

摘　　要：针对淮南矿区深部煤层充填开采对建筑物的影响问题,以某矿充填开采工作面为例进行实验,通过现场观测和数值模拟的手段研究充填开采对地表建筑物的保护情况。结果表明:工作面达到稳沉后最大下沉量为143 mm,不足以危害建筑物安全使用;整个开采活动周期内地表最大倾斜变形为1.8 mm/m、最大曲率变形为0.088 mm/m^(2),均小于建筑物安全使用的阈值,地表移动变形过程中最大下沉速度为1.32 mm/d,没有达到危险变形阶段;通过数值模拟发现当充填率提升至60%时所产生的倾斜变形不足以对建筑物构成危害;根据模拟结果发现该工作面上方建筑物稳定性主要受下沉量和倾斜变形影响,通过计算发现充填率与地表沉陷、倾斜变形之间近似呈一种线性关系,由线性拟合可得保证该工作面上方高层建筑稳定的最小充填率为88%。Aiming at the influence of backfill mining on buildings in the deep coal seam in Huainan mining area,an experiment was carried out with the backfill mining face of a mine as an example,and the protection of surface buildings by backfill mining was studied by means of on-site observation and numerical simulation.The results show that:the maximum subsidence value of the working face is 143 mm after it reaches stability,which is not enough to endanger the safe use of buildings;the maximum surface inclination deformation during the whole mining activity period is 1.8 mm/m,the maximum curvature deformation is 0.088 mm/m^(2),which is less than the safe use threshold of buildings,and the maximum sinking speed is 1.32 mm/d in the process of surface movement and deformation,which does not reach the dangerous deformation stage;through numerical simulation,it is found that when the filling rate is increased to 60%,the inclined deformation generated is not enough to cause damage to the building;according to the simulation results,it is found that the stability of the building above the working face is mainly affected by the amount of subsidence and inclination deformation.It is found that there is an approximate linear relationship between the filling rate and the surface subsidence and tilting deformation.From the linear fitting,the minimum filling rate to ensure the stability of the high-rise building above the working face is 88%.

关 键 词：建筑物稳定性 充填开采 充填率 地表运动 

分 类 号：TD823.[矿业工程—煤矿开采]