摘要
本文阐述了一些软岩巷道围岩松动带中波速测定的结果,并利用变参数的二次抛物型强度曲线讨论了软岩的非均质塑性(松动)状态。强度参数的变化规律利用声波波速测定结果来描述。理论分析结果说明围岩在开始破裂和即将失去承载能力之前有较大的变形。计算结果与实例比较吻合。
The paper describes results of acoustic velocity measurement in soft rock around the roadway. The inhomogeneous plastic state, loose state of soft rock is analyzed by using Mohr criterion in the form of quadratic parabola of variable parameters. The rules of intensity parameter variation are described by the results of acoustic velocity measurement.
Theoretical analysis shows vhat big deformation takes place when the rock begins to crack and just before the rock loses its carrying capacity. The calculations are in agreement with the practical example.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1991年第2期63-70,共8页
Journal of China Coal Society
关键词
软岩
巷道
围岩
松动带
测定
声波
roadway in soft rock
loose zone
acoustic velocity measurement
