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动力扰动下充填体内预留巷道稳定性分析

  • 罗福龙
  • 作者单位:
  • 江西钨业控股集团有限公司
  • 基金项目:

  • 国家自然科学基金青年项目(12005099)
  • 详细信息:

  • 作者简介:
  • 罗福龙(1989—),男,工程师,从事采矿技术研究、矿山安全生产管理和矿产资源开发等工作;E-mail:353895111@qq.com
  • 通讯作者:
  • isnull
  • PDF下载

Stability analysis of reserved tunnels in fill body under dynamic disturbance

  • English Author:
  • Jiangxi Tungsten Holding Group Company Limited
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

巷道的稳定性是矿山安全高效生产的保障,在动力作用下实现充填体内预留巷道的稳定性预测,是指导工程实践的关键。为了研究不同扰动下充填体内预留巷道的动力响应规律,以某矿山工程为研究对象,采用3DEC数值模拟技术,建立了巷道动力稳定性分析的三维数值模型,并进行了数值模拟分析。研究结果表明:对于马蹄形巷道,同一水平的动力扰动对侧帮的影响较大。随着动力扰动距离的增大,巷道周围质点振动的差异性越来越小。采用钢丝绳+钢筋网的预留巷道开采方式,能够合理有效地对巷道外爆破动力扰动进行很大程度上的削弱,这对于巷道稳定性的保持是非常有利的。

关键词:

充填体;动力扰动;巷道稳定性;动力响应;数值分析;支护

Abstract:

The stability of tunnels is the guarantee for safe and efficient mining production,and predicting the stability of reserved tunnels inside fill bodies under dynamic forces is the key to guiding practical engineering.To study the dynamic response laws of reserved tunnels inside fill bodies under different disturbances,a certain mining engineering was taken as the research object,and a three-dimensional numerical model of tunnel dynamic stability analysis was established and numerically simulated using 3DEC numerical simulation technology.The research results show that for horseshoe-shaped tunnels,the impact of dynamic disturbances at the same level has a greater influence on the sidewall.As the distance of dynamic disturbances increases,the difference in particle vibration around the tunnel becomes smaller.The reserved tunnel mining method using  steel wire rope and steel mesh can effectively and reasonably weaken the dynamic disturbance from outside blasting to a great extent,which is very favorable for maintaining tunnel stability.

Keywords:

fill body;dynamic disturbance;tunnel stability;dynamic response;numerical analysis;support