采矿与安全工程学报 ›› 2012, Vol. 29 ›› Issue (3): 386-390.

• 论文 • 上一篇    下一篇

孟家岗铁矿开采方案及地表铁路安全研究

  

  1. 1.东北大学资源与土木工程学院,辽宁  沈阳  110819;
    2.中国煤炭科工集团沈阳设计研究院,辽宁  沈阳  110004
  • 收稿日期:2011-09-30 出版日期:2012-05-15 发布日期:2012-04-12
  • 作者简介:李海洲(1982-),男,辽宁省锦州市人,博士,从事采矿工程方面的研究。 E-mail:huaienf@126.com Tel:15040393478
  • 基金资助:

    国家自然科学基金项目(50874024,10872046,50904013)

    教育部重点科技项目(107033)

    中央高校基本科研业务费项目(N100401003)

    教育部基本科研业务费项目(N100601003)

Study on Mining Scheme and Surface Railway Safety in Meng Jia-gang Iron Mine

  • Received:2011-09-30 Online:2012-05-15 Published:2012-04-12

摘要: 根据孟家岗铁矿实际地质情况,有铁路、公路于矿区之间穿过,为最大限度地回收资源和保证上部公路的安全运行,确定了房柱法与胶结充填两种采矿方案。通过岩体宏观结构凋查分析、取样、室内岩石力学试验和工程类比,综合确定岩体及充填体力学参数;并采用有限元力学分析软件Comsol Multiphysics对2种不同的开采方案引起公路地表的沉降高度进行了数值计算,模拟计算结果表明:采用“尾砂+普通水泥+粉煤灰+水”配比方案进行胶结充填采矿法采矿时,5#、6#勘探线范围内铁路处的沉降值均小于30 mm,符合安全规程要求,不会影响地表铁路的正常运营,后期地表位移监测结果也较好地验证了尾砂胶结充填采矿方法的正确性。

关键词: 采矿工程, 铁路下开采, 地表变形, 有限元分析, 沉降监测

Abstract: According to the geological condition in Mengjiagang Iron mine, as well as railway, highway passing through the mining area, in order to maximize the resource recycling and ensure the transportation safety of upper railway, two mining schemes including the cemented filling method and room and pillar method were adopt in this paper. Mechanical parameters of rock mass were comprehensively determined based on rock macrostructure survey, sampling, rock mechanics test and engineering analogy. In addition, the software of Comsol Multiphysics was used to calculate the surface sedimentation height caused by the two different mining schemes. The numerical calculation results show that when using cemented filling mining method with the mix proportion scheme of “tailing + cement + fly ash + water”,  the sedimentation values of railway surface in the range of No. 5 and No. 6 exploration lines are all less than 30 mm, which meets the requirement of safety regulations, and will not affect the normal operation of railway on the surface. The validity of cemented filling method with tailings is verified well by later surface displacement monitoring results.

Key words: mining engineering, mining under railways;surface deformation;finite element analysis;subsidence monitoring