摘要
为消除采空区给铁矿采矿生产安全带来的巨大威胁,本文以袁家村铁矿采空区探测为研究对象,应用高密度电阻率法对隐伏采空区的探测进行了研究,分别建立了简单地质条件下和复杂地质条件下的采空区探测正演模型。在简单地质条件下正演模拟计算得出的电阻率剖面图中,不同装置下的采空区均具有高阻异常和电阻率突变的响应特征。在复杂地质条件下,灰岩、变辉绿岩等复杂地质体在电阻率剖面图上也有明显的异常反映,并且偶极装置对采空区异常的反映更加明显,空间位置更加吻合。在现场采空区探测中,采空区在探测成果图中有明显的反映。根据采空区识别标志圈定了采空区异常的分布范围。经钻探验证,电阻率异常空间位置与采空区实际位置基本符合。结合采空区三维激光扫描,建立了采空区立体模型,精确地获取了采空区的空间特征信息。
In order to eliminate the great threat to the safety of iron mining production caused by goaf,this paper takes the goaf detection of Yuanjiacun iron mine as the research object,and studies the detection of concealed goaf by high density resistivity method.The forward models of goaf detection under simple geological conditions and complex geological conditions are established respectively.In the resistivity profile calculated by forward simulation under simple geological conditions,the goaf under different devices has the response characteristics of high resistance anomaly and sudden change of resistance.Under complex geological conditions,limestone,epidiabase and other complex geological bodies also have obvious abnormal reflection on the resistivity profile,and the dipole device has more obvious reflection on the goaf anomaly and the spatial position is more consistent.In the field goaf detection,the goaf is obviously reflected in the detection result.According to the identification mark of goaf,the abnormal distribution range of goaf is delineated.It is verified by drilling that the spatial position of resistivity anomaly is basically consistent with the actual position of goaf.Combined with the three-dimensional laser scanning of goaf,the three-dimensional model of goaf is established,and the spatial characteristic information of goaf is obtained accurately.
作者
杨兆林
郭凯
YANG Zhaolin;GUO Kai(Yuanjiacun Iron Mine,Taiyuan Iron and Steel(Group)Lanxian Mining Co.,Ltd.,Lyuliang 033504,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《中国矿业》
北大核心
2020年第8期158-164,共7页
China Mining Magazine
基金
国家重点研发计划项目资助(编号:2016YFC0801603,2017YFC1503105)
中央高校基本科研业务经费项目资助(编号:N172303015)。
关键词
铁矿
采空区
高密度电阻率法
正演模型
iron mine
goaf
high density resistance method
forward model
