煤矿泥岩流变模型辨识及支护方法的确定

THE RHEOLOGICAL MODEL AND THE SUPPORT METHOD OF MUDSTONE IN THE MINE

  • 摘要: 结合高家梁煤矿斜井泥岩的流变变形特征, 对泥岩进行分析建模, 设计有效的泥岩斜井支护措施. 通过对泥岩进行蠕变加卸载试验, 采用统一流变力学模型理论建立了能表现泥岩流变特性的弹性--黏性--黏弹性--黏弹塑性模型, 并确定了流变模型参数. 结合泥岩试验测得的泥岩力学特性和现场观测资料, 设计采用锚喷网联合支护方法, 并采用大型有限元软件ADINA进行数值模拟分析, 该支护方法能有效控制泥岩变形, 采用的锚喷网支护方法合理可靠.

     

    Abstract: According to the rheological deformation characteristicsof mudstone around an inclined well in Gao Jia Liang mine, this paperproposes a mudstone model with effective support measures for theinclined well. Through mudstone creep loading and unloading tests and based on the model theory of unified rheology, an elastic-viscous-visco elastic-visco elastic-plastic model is established, which can reasonably represent rheological properties of mudstone, and the model parameters are calculated. Through analyzing mudstone mechanical properties obtained by tests and field observation data, and with the bolt-spray-net joint support method, the simulation is carried out by Large-scale finite element software ADINA. It is shown that the support method can effectively control mudstone's deformation, and the bolt-spray-net support method is reasonable and reliable.

     

/

返回文章
返回