金属矿空区冒落诱发地表塌陷范围的计算模型探讨  

Calculation Model of Range of Surface Subsidence Caused by the Caving in Mined⁃out Area of Metal Mine

作　　者：李海英[1,2] 任凤玉 赵云峰[4] 丁航行 LI Hai-ying;REN Feng-yu;ZHAO Yun-feng;DING Hang-xing(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Postdoctoral Research Station of HBIS Group Co Ltd,Shijiazhuang 050023,Hebei,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,Liaoning,China;Xigang Group Dengta Mining Co Ltd,Liaoyang 111300,Liaoning,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]河钢集团有限公司博士后科研工作站,河北石家庄050023 [3]东北大学资源与土木工程学院,辽宁沈阳110819 [4]西钢集团灯塔矿业有限公司,辽宁辽阳111300

出　　处：《矿冶工程》2020年第5期5-8,共4页Mining and Metallurgical Engineering

基　　金：国家重点研发计划(2016YFC0801601);国家自然科学基金重点项目(51534003)。

摘　　要：从采空区冒落过程入手,建立了采空区冒落诱发地表塌陷范围的计算方法。研究发现,地表的初始陷落是采空区剩余空间的突然上移,在重力场作用下,采空区冒透地表时对应的冒落等价椭圆中心在地表的投影位置,可作为地表塌陷坑中心的期望位置;而塌陷坑的尺度可根据采空区冒透地表时的剩余空间体积进行估算。该方法在小汪沟铁矿的应用结果表明,本文建立的地表初始塌陷位置估算式与实际误差不超过5%,该方法可用于估测地表塌陷的时间与空间,为地表陷落灾害的安全经济防治提供依据。In view of the caving process in the mind⁃out area,a calculation method was proposed for the range of surface subsidence induced by the caving in mined⁃out area.It is found that the remaining space of the mind⁃out area will suddenly move upward at an initial stage of subsidence of the ground surface.Due to the action at the gravitational field,when the large and serious roof caving occurs,the corresponding caving⁃equivalent ellipse center that is projected on the ground surface can be regarded as the expected surface subsidence pit,and the dimension of the subsidence pit can be estimated based on the volume of remaining space of the mined⁃out area.This method was applied in the Xiaowanggou Iron Mine,and the results show that compared to the actual position,the margin of error of the initial surface collapse position estimated by the formula established in this paper doesn′t exceed 5%.It is concluded that this method can be used to estimate the time and space of surface subsidence,providing the basis for prevention and control of surface subsidence disaster in a safe and economical way.

关 键 词：采空区 冒落 地表塌陷 初始塌陷范围 计算模型 

分 类 号：TD327[矿业工程—矿井建设]