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金属矿山 ›› 2018, Vol. 47 ›› Issue (10): 41-45.

• 采矿工程 • 上一篇    下一篇

保国铁矿软岩巷道支护方式的数值模拟研究

刘冬,邵安林,金长宇,王旭刚,荆洪迪,范富泉   

  1. 东北大学智慧矿山研究中心,辽宁 沈阳 110819
  • 出版日期:2018-10-15 发布日期:2018-11-09
  • 基金资助:

    *:国家自然科学基金项目(编号:51109035),“十二五”国家科技支撑重点计划项目(编号:2016YFC0801605)。

Numerical Simulation for Supporting Scheme of Soft Rock Roadway in Baoguo Iron Mine

Liu Dong,Shao Anlin,Jin Changyu,Wang Xugang,Jing Hongdi,Fan Fuquan   

  1. Intelligent Mine Research Center, Northeastern University, Shenyang 110819, China
  • Online:2018-10-15 Published:2018-11-09

摘要: 保国铁矿地下矿山软岩巷道围岩地质条件复杂,下盘围岩破碎,抗压强度低,遇水极易破碎、膨胀产生变形破坏,严重影响了矿山的开采和运输。为减缓该矿铁蛋山矿区地下开采过程中的巷道围岩变形破坏程度,提高地下工程的稳定性,保持矿山安全高效生产,对+35 m水平分段巷道进行变形监测,并采用FLAC3D软件进行数值计算,分析了保国铁矿软岩巷道在不同支护方案下,无底柱分段崩落法沿脉运输巷道围岩的位移与塑性区等情况。结果表明:在重点破坏区域采用多支护手段联合支护方案,可显著提高该矿软岩巷道围岩强度和承载能力,有效遏制动压软岩巷道破坏趋势。

关键词: 岩体力学, 软岩巷道, 支护方案, 变形监测, 数值模拟

Abstract: The geological conditions of underground soft rock roadway in Baoguo Iron Mine is complicated with broken surrounding rock at the footwall, low compressive strength. It is easy to be broken and swelled when the roadway meets water, which seriously affects the mining and transportation of the mine. In order to reduce the deformation and failure of roadway surrounding rock in the underground mining process of Tiedanshan mining area, improve the stability of underground engineering and maintain the safe and efficient production of the mine, the deformation monitoring of + 35 m horizontal sublevel roadway was carried out, and the related numerical calculation was made by using FLAC3D software. The displacement and plastic zone of the surrounding rock roadway for transportation in the pillarless sublevel caving method with different supporting in Baoguo Iron Mine was analyzed. The results indicated that the strength and bearing capacity of soft rock roadway in this mine can be significantly improved and the failure trend of dynamic pressure at soft rock roadway can be effectively prevented by adopting the combined support means in the key weak and broken area.

Key words: Rock mechanics, Soft rock roadway, Supporting scheme, Deformation monitoring, Numerical simulation