摘要
煤岩的蠕变特性对回采巷道的稳定性具有重要的影响作用,在煤岩单轴压缩试验的基础上,采用分级加载的方式对阳煤集团三矿回采巷道煤岩进行了蠕变试验。结果表明,煤岩具有明显的蠕变特征,蠕变过程主要有衰减蠕变与稳态蠕变两个阶段。通过BFGS算法的MATLAB编程实现了煤岩单轴压缩蠕变试验曲线的Burgers蠕变模型参数识别,得出Burger蠕变模型可很好地描述煤岩蠕变特性。
The creep characteristics of coal rock has great effect on the stability of the gateway. Based on the test of coal uniaxial compression,the creep test of the coal rock in the gateway was carried out by multi-level loading. The results show that the coal rock has obvious creep characteristics,and there are two stages of the creep: the decay creep and steady creep. The parametric identification of the Burgers creep model of the coal rock uniaxial compression creep test curve was realized by MATLAB programming based on the BFGS algorithm,which presents that the Burger creep model can be well used to describe the creep characteristics of the coal rock.
出处
《陕西煤炭》
2016年第2期60-62,共3页
Shaanxi Coal
关键词
煤岩
蠕变
巷道
蠕变模型
coal rock
creep
tunnel
creep model
