摘要
基于三贵口铅锌矿矿柱及采空区形态分布,结合矿山的基本情况、工程地质条件、岩石力学试验结果等资料,采用面积承载法和普氏理论法对三贵口铅锌矿580 m中段以上共80根矿柱进行稳定性理论计算,得出安全系数F<1.0、1.0≤F≤1.5和F>1.5的矿柱数量分别为面积承载法23根、12根和45根;普氏理论法25根、12根和43根。基于Mathews图解法对580 m中段以上共100个采空区进行稳定性计算分析,得出处于稳定区、无支护过渡区、支护稳定区、支护过渡区和开挖区的采空区数量分别为44个、29个、25个、2个和0。同时,采用FLAC3D软件对典型矿柱及采空区进行计算分析,得出F>1.5、1.0≤F≤1.5、F<1.0对应的矿柱数量分别为46根、12根和22根,且C9-3-07附近采空区存在失稳或冒落的可能性,与现场实际情况吻合。最后,基于上述研究成果综合评价资源待回收区域采空区及矿柱的稳定性,将矿柱稳定性分为稳定、较稳定和不稳定三级,将采空区稳定性分为稳定、较稳定、较不稳定和不稳定四级。研究成果有望为后续矿山矿柱安全高效回采和采空区治理提供理论支撑。
Based on the shape distribution of pillars and goafs in Sanguikou Lead-Zinc Mine,combined with the basic situation of the mine,engineering geological conditions,rock mechanics test results and other data,the stability of 80 pillars above 580 m middle section in Sanguikou Lead-Zinc Mine was calculated by area bearing method and Platts theory method.It is concluded that the number of pillars with safety factors of F>1.5、1.0≤F≤1.5、F<1.0 is 23,12 and 45 respectively by area bearing method,and the number of pillars in the Platts theory method is 25,12 and 43 respectively.Based on Mathews graphic method,the stability calculation and analysis of 1o0 goafs above 580 m middle section were carried out.It is concluded that the number of goafs in stable area,no support transition area,support stable area,support transition area and caving area is 44,29,25,2 and O respectively.At the same time,FLAC3D software was used to calculate and analyze the typical pillar and goaf.It is concluded that the number of pillars corresponding to F>1.5,1.0≤F≤1.5 and F<1.0 is 46,12 and 22 respectively,and there is a possibility of instability or caving in the goaf near C9-3-07,which is consistent with the actual situation on site.Finally,based on the above research results,the stability of goaf and pillar in the area to be recovered was comprehensively evaluated.The stability of the pillar is divided into three levels:stable,more stable and unstable,and the stability of the goaf is divided into four levels:stable,more stable,more unstable and unstable.The research results are expected to provide theoretical support for the safe and efficient mining of mine pillars and the treatment of goaf in the future.
作者
王长军
卢磊芬
冯庆杰
李辉
温嘉明
刘怀宇
WANG Changjun;LU Leifen;FENG Qingjie;LI Hui;WEN Jiaming;LIU Huaiyu(Zijin(Changsha)Engineering Technology Co.,Ltd.,Changsha,Hunan 410036,China;Urat Rear Banner Zijin Mining Co.,Ltd.,Bayannur,Inner Mongolia 015500,China)
出处
《矿业研究与开发》
CAS
北大核心
2024年第7期49-56,共8页
Mining Research and Development
关键词
矿柱
采空区
稳定性分析
安全分级
数值模拟
Pillar
Goaf
Stability analysis
Safety classification
Numerical simulation
