依据扩容率判断围岩的稳定状态

Judging stability of surrounding rock based on volume expansion ratio

确定围岩的稳定性状态是地下工程研究的关键难题之一,至今尚无有效的分析方法,即使进行了现场监测,也难以判定围岩的稳定状态。本文以自承载能力是决定围岩稳定性的主要因素为依据,在深入分析现场实测资料的基础上,开展了反映围岩变形特点的平面应变试验,综合建立了围岩扩容率与其自承载能力的关系模型,以期在现场监测结果与围岩稳定状态之间架起桥梁。

How to judge the stability of surrounding rock is a key problem in underground engineering. There is yet no effective approach. It is a difficult problem even in-situ inspection. According to that self-bearing capacity is the key of surrounding rock stability, plain strain experiments are carried out on the basis of the analysis of in-situ measured data, and the relationship between volume expansion ratio and self-bearing capacity is presented, which is meaningful in underground engineering.