采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (1): 34-40.

• 论文 • 上一篇    下一篇

自然崩落法采场软破围岩巷道支护技术研究

  

  1. 1.北京科技大学土木与环境工程学院,北京 100083; 2.中国地质科学院郑州矿产综合利用研究所,河南 郑州 450006
  • 出版日期:2014-01-15 发布日期:2014-02-26
  • 作者简介:明建(1979-),男,山东省夏津县人,博士,讲师,从事工程力学方面的研究。 E-mail:mingjian.ustb@163.com Tel:010-62332081
  • 基金资助:

    国家“十二五”科技支撑计划项目(2012BAB01B04);中央高校基本科研业务费项目(FRF-TP-12-017A)

Study on supporting technology for roadways of soft rock mass in natural caving method

  • Online:2014-01-15 Published:2014-02-26

摘要: 针对自然崩落法采场巷道布置密集、存在时间长、采动影响大、维护难度大等特点,采用现场调研、室内试验、理论分析、井下巷道试验与变形实测等综合手段,分析软破围岩巷道变形破坏特征和支护难点。以围压恢复加固理论为指导,提出了被动和主动联合支护体系,采用增设底梁和提高充填接顶等全封闭强化支护措施。现场实施结果表明,巷道收敛量能够控制在80 mm以内,实现了对巷道围岩变形的有效控制,维护高应力环境软破围岩巷道的稳定性,为自然崩落法采矿奠定基础。

关键词: 自然崩落法, 软岩, 巷道支护, 变形控制

Abstract: As for the problem of intense roadway layout, long time existence, large mining influence and great maintenance difficulty in the mine with natural caving mining method, a comprehensive method including field investigation,laboratory test,theoretical analysis, underground roadway test and deformation measurement has been used to analyze the deformation failure characteristics and support difficulties. With the guidance of confining pressure restored reinforcement theory, the active and passive combined support system of the surrounding rock is put forward, and mudsill, roof-contacted filling and other enhanced support techniques are adopted. The industrial test shows that the roadway deformation can be controlled within 80 mm after support provided. This proposes support technology can effectively control the surround rock deformation in soft rock roadway, which ensures the safety and feasibility of natural caving method in soft rock.

Key words: natural caving method, soft rock, roadway support, deformation control