地面荷载作用下采煤塌陷区地基再变形研究  

Research on deformation of foundation in subsidence coal mining area under ground load

作　　者：马春艳[1] 张予东 马玉宽[3] 

机构地区：[1]河南理工大学测绘学院,河南焦作454003 [2]郑州测绘学校,河南郑州450000 [3]郑州市规划勘测设计研究院,河南郑州450000

出　　处：《中国矿业》2013年第9期107-110,共4页China Mining Magazine

基　　金：国家自然基金项目"煤矿塌陷区地基稳定性与承载力研究"资助(41072225);河南省科技厅重点科技攻关计划项目"煤矿塌陷区荷载作用下地基再变形机理及控制研究"资助(102102210196);中国煤炭工业协会项目"地下开采损害反演动态模拟评价方法研究"资助(MTKJ2010-352);河南省重点攻关项目资助(112102210193)

摘　　要：随着土地利用的日益紧张,一些地区工业厂房和住宅楼不得不建在采煤塌陷区,在地面建筑物荷载作用下,已受损伤的岩体可能会再一次产生较大的移动和变形,甚至失稳、破坏,从而影响塌陷区地基的稳定性和建筑物正常使用。以某矿塌陷区地质采矿条件为原型,首先利用概率积分法,推导地基再变形的预计公式,再根据地质采矿条件和地基影响因素,运用数值模拟和回归分析等方法,确定塌陷区建筑荷载作用下地基再变形的再下沉系数。最后结合数值模拟,分析荷载大小和加载位置对采煤塌陷区地基再变形的影响,在荷载大小相同情况下,塌陷区拐点区的地基下沉量和再变形量较大,中央区再下沉和变形较小;在拐点区、边缘区和中央区三个不同建筑荷载作用位置,地基再下沉量、再变形都随着建筑荷载的增大而增大。With the growing tension of land use,industrial building and apartment blocks have to built in coalmine subsided area in some areas.In the effect of building load,the impaired lock mass may produce major remove and transformation again,even cause unstability and damaged,thus the stability of subsidence areas and the normal use of buildings are affected.It uses geological and mining conditions of choic subsided areas some mine as an example,Firstly,the paper erivates of the expected formula foundation redeformation based on the probability integral method.Secondly,According to affecting factors of foundation the geological and mining conditions,Using numerical simulation and regression analysis methods are used,foundation redeformation calculation of sinking parameter is sured subsided area of under building loads.Finally,combined with the results of numerical simulation,the paper evaluats the stability of foundation subsidence areas of mine by analyzing different load size and loading positions.The impact of foundation deformation is analyzed of load size and load position on the coal mining subsidence area,in the same case of the size of the load,the amount of ground subsidence inflection point of the collapse area and redeformation is larger as central area;three different buildings in the loading position of the inflection point area,edge and central areas,the foundation and resubsidence,and deformation increases with the increase of the construction load.

关 键 词：建筑荷载 塌陷区 地基再变形 地基稳定性 

分 类 号：TU443[建筑科学—岩土工程]