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郑群, 余国锋, 仇文革, 陈昊喆, 刘洋. 大变形巷道限阻耗能型支护结构研究[J]. 矿业安全与环保.
引用本文: 郑群, 余国锋, 仇文革, 陈昊喆, 刘洋. 大变形巷道限阻耗能型支护结构研究[J]. 矿业安全与环保.
ZHENG Qun, YU Guofeng, QIU Wenge, CHEN Haozhe, LIU Yang. Research on energy-consuming support structures with limited resistance in large deformation roadways[J]. Mining Safety & Environmental Protection.
Citation: ZHENG Qun, YU Guofeng, QIU Wenge, CHEN Haozhe, LIU Yang. Research on energy-consuming support structures with limited resistance in large deformation roadways[J]. Mining Safety & Environmental Protection.

大变形巷道限阻耗能型支护结构研究

Research on energy-consuming support structures with limited resistance in large deformation roadways

  • 摘要: 为了解决深部煤矿开采过程中所遇到的“高地应力、大变形、支护结构破坏”等问题,以朱集东矿东部辅助轨道大巷为工程背景,采用变形监测与数值模拟的方法研究深井软岩巷道围岩变形特征规律;依据围岩耗能支护理念,设计出控制巷道围岩能量释放与变形的“限制支护阻力阻尼器”(简称:限阻器)。通过数值分析与室内静压试验相结合的方式得到限阻器试件的性能指标与设计参数之间的关系,并验证限阻器的工作性能;最后通过数值模拟对比巷道常规支护与限阻耗能支护形式的变形与受力情况,验证巷道限阻耗能型支护方案的可行性。结果表明:限阻器的试验压缩量均达到了80%以上,具有较大的变形行程,在保证初期支护发生较大变形的前提下,达到降低围岩压力、耗散围岩能量的目的;限阻耗能支护较巷道常规支护最大主应力值分别降低51.2%、89.8%,提高了结构的安全性。

     

    Abstract: In order to solve the problems of "high ground stress, large deformation and damage to the support structure" encountered during deep coal mining. The deformation monitoring and numerical simulation method is used to study the deformation characteristics of the surrounding rock in the soft rock roadway of the deep shaft, taking the eastern auxiliary trackway of Zhuji East Mine as the engineering background. Based on the concept of energy-consuming support of the surrounding rock, a "limiting support resistance dampener" is designed to control the energy release and deformation of the surrounding rock of the roadway, referred to as "limiting dampener". The relationship between the performance indexes and the design parameters of the damper specimen is obtained through a combination of numerical analysis and indoor hydrostatic testing, and the performance of the damper is verified; finally, the deformation and stresses of the conventional and energy-consuming forms of support are compared by numerical simulation to verify the feasibility of the energy-consuming support scheme. The results show that:(1) the test compression of the restrictor reached more than 80%, with a large deformation stroke, to reduce the pressure of the surrounding rock and dissipate the energy of the surrounding rock under the premise of ensuring the large deformation of the initial support. (2) The maximum main stress value of the energy dissipating support of the restrictor is reduced by 51.2% and 89.8% respectively compared with the conventional support of the roadway, which improves the safety of the structure.

     

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