基于长壁采空区覆岩稳定性的地表残余下沉系数计算方法  

Calculation method of surface residual subsidence coefficient based on stability of overlying strata in longwall goaf

作　　者：韩科明 Han Keming(CCTEG Ecological Environment Technology Co.,Ltd.,Beijing 100013,China;Department of Ecological Science and Technology,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;China Coal Technology Engineering Group,Beijing 100013,China;CCTEG Beijing Research Institute of Land Renovation and Ecological Restoration Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中煤科工生态环境科技有限公司,北京100013 [2]天地科技股份有限公司生态科技事业部,北京100013 [3]中国煤炭科工集团有限公司,北京100013 [4]中煤科工集团北京土地整治与生态修复科技研究院有限公司,北京100013

出　　处：《矿山测量》2021年第2期1-4,共4页Mine Surveying

基　　金：北京市科技计划课题重点研发计划(Z181100005118012);中国煤炭科工集团有限公司科技创新创业资金专项重点项目(2018-2-ZD007)。

摘　　要：为确定地表建(构)筑物荷载作用下长壁采空区地表残余下沉系数,基于长壁采空区覆岩稳定性分析方法,提出了采空区中央和边界两个区域的地表下沉系数确定原则和计算方法。采用概率积分法对荷载作用下长壁采空区地表残余沉陷预测时,地表下沉系数的选取应充分考虑地表荷载大小和作用位置、垮落带岩体的压密,以及裂缝带破断岩体结构的稳定性,按照垮落带垮落岩体压密区(采空区中央)和裂缝带破断岩体结构可能失稳区(采空区边界)两个区域分区计算,推导了荷载作用下长壁采空区垮落岩体压密区、采空区覆岩结构滑落失稳和回转失稳时地表残余下沉系数计算公式。In order to determine the surface residual subsidence coefficient of the long-wall goaf area under the load of the surface buildings(structures),based on the overlying strata stability analysis method of the long-wall goaf area,the determination principle and the calculation method of the surface subsidence coefficients were proposed in the center and the boundary of the goaf.When using the probability integral method to predict the surface residual subsidence of the long-wall goaf under the load,the surface subsidence coefficient should be selected considering fully the magnitude and location of the surface load,the compaction of the rock mass in the caving zone,and the stability of the fractured rock mass structure in the fracture zone,and calculated according to the two areas of the collapse zone collapsed rock mass compaction area(center of the goaf)and the fracture zone broken rock mass structure possible instability area(boundary of the goaf),and the calculation formula of the surface residual subsidence coefficient was deduced when the collapsed rock mass compaction zone in the long-wall goaf and the overlying strata structure in the goaf under load were instability and rotational instability.

关 键 词：采空区 残余下沉系数 地表残余沉陷预测 覆岩稳定性 砌体梁 

分 类 号：TD325[矿业工程—矿井建设]