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金属矿山 ›› 2014, Vol. 43 ›› Issue (11): 54-57.

• 采矿工程 • 上一篇    下一篇

白象山铁矿河床下开采地表沉降数值模拟分析

刘彦超1,陈轲2,蔡嗣经1,黄刚1,刘发平2   

  1. 1.北京科技大学土木与环境工程学院,北京 100083;2.马钢(集团)控股有限公司姑山矿业公司,安徽 马鞍山 243184
  • 出版日期:2014-11-15 发布日期:2015-05-21
  • 基金资助:

    * 国家自然科学基金项目(编号:51204100)。

Numerical Simulation Analysis of Ground Surface Subsidence During Mining of Baixiangshan Iron Mine under a Riverbed

Liu Yanchao1,Chen Ke2,Cai Sijing1,Huang Gang1,Liu Faping2   

  1. 1.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Gushan Mining Company,Magang (Group) Holding Company Ltd.,Maanshan 243184,China
  • Online:2014-11-15 Published:2015-05-21

摘要: 针对设计采用嗣后充填采矿法的白象山铁矿的主矿体位于青山河床下的状况,为了保障矿山安全生产,采用数值模拟方法,对矿体、围岩及断层进行建模,对断层采用岩体弱化的方法建立模型,对于重点研究的地表和对结果有影响的断层进行细化网格的划分,并依据设计的连续倾斜进路尾砂充填法对模型进行开采与充填,分析地表沉降情况。通过计算分析,确定了位于地表河流中部即横坐标为400 m处的最大沉降值0.23 m。根据模拟结果,提出了对存在安全隐患的断层注浆加固的处理方法。经过再次运算得出最大沉降值减小到0.15 m,研究结果验证了采矿方法的安全可行性与注浆加固方法的安全有效性。  

关键词: 充填法采矿, 数值模拟, 地表沉降, 注浆加固

Abstract: In view of the main orebody of Baixiangshan iron mine is located under Qingshan river.In order to guarantee the safe mining,the numerical simulation method is used to build model of the ore body,surrounding rocks and faults.Faults model is built with rock weakening method.The surface and the faults with large influence are meshed,and then the caving and filling on the model are made by the continuously inclined drift stoping method with tailings backfilling to analyze the situation of surface subsidence.Through analysis and calculation,the maximum settlement value at the central river with the X-coordinate 400m is determined to be 0.23 m.According to the simulation results,an approach for grouting reinforcement of faults in risks was proposed.Through the calculation,the maximum settlement value is reduced to 0.15 m.The results verify the feasibility and safety of mining methods and the safety effectiveness of the grouting reinforcement method.

Key words: Mining with backfill, Numerical simulation, Surface subsidence, Grouting reinforcement