大红山铁矿露天——地下联合开采岩移发展规律研究  

Research on the Development Law of Rock Movement in the Opencast Underground Combined Mining of Dahongshan Iron Mine

作　　者：张玮 杨天鸿[2] 侯俊旭 马凯 ZHANG Wei;YANG Tianhong;HOU Junxu;MA Kai(Yuxi Dahongshan Mining Co.,Ltd.,Yuxi 653100,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]玉溪大红山矿业有限公司,云南玉溪653100 [2]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《金属矿山》2024年第2期232-238,共7页Metal Mine

基　　金：中央高校基本科研业务专项(编号:N2201003);国家自然科学基金项目(编号:U1903216)。

摘　　要：地下开采产生的地表移动会影响邻近露天采场边坡的稳定性。以大红山铁矿露天—地下联合开采为例,采用微震、地表开裂观测等多种方法进行岩移监测和数据分析,探究了地下开采引起的岩体移动与地表开裂规律。首先,对历史监测数据进行了整理和分析,包括地表塌陷和裂缝的发育情况。其次,针对地下开采过程中的围岩变形特点,开展微震数据分析,获取了岩体损伤破坏信息。同时,结合矿山地质资料,统计数据得出了陷落角的变化范围。结果表明:大红山铁矿露天—地下联合开采,岩体移动发展阶段可划分为:冒落及地表贯通的岩移阶段、陷落区充分发展的岩移阶段、F2断层影响的陷落角非对称发育阶段、废石充填与深部开采下的岩移阶段。西北部陷落角发育范围为75°~81°、东南部陷落角发育范围为65°~82°。研究可为类似地质及工程条件矿山岩移发展规律分析提供一定参考。The surface movement caused by underground mining can affect the stability of adjacent open-pit slopes.Tak-ing the combined open-pit and underground mining of Dahongshan Iron Mine as an example,various methods such as micro-seismic observation and surface cracking observation were used for rock movement monitoring and data analysis to explore the laws of rock mass movement and surface cracking caused by underground mining.Firstly,the historical monitoring data of the open-pit underground combined mining project was organized and analyzed,including the development of surface subsidence and cracks.Secondly,based on the deformation characteristics of surrounding rock during underground mining,microseismic monitoring was conducted to obtain information on rock damage and failure.At the same time,based on the geological condi-tions of the mine and statistical data,the range of changes in subsidence angle is determined.The results indicate that the de-velopment stages of rock mass movement in the open-pit underground joint mining of Dahongshan Iron Mine can be divided in-to:movement stages of caving and surface connectivity,fully developed rock movement stages of subsidence areas,asymmetric development stages of subsidence angles influenced by F2 fault,and rock movement stages under waste rock filling and deep mining.The development range of the northwest subsidence angle is 75°~81°,and the southeast subsidence angle is 65°~82°.The study can provide a certain reference for the analysis of the development law of rock movement in mines under similar geo-logical and engineering conditions.

关 键 词：大红山铁矿 露天—地下联合开采 岩体移动 陷落角 

分 类 号：TD853[矿业工程—金属矿开采]