岩石脆性破壞及地下坑室穩定性之初步探討

The Preliminary Study of the Rock Failure and the stability of Underground Openings

廖日昇(Jih-Sheng Liao)

《鑛冶：中國鑛冶工程學會會刊》 27卷4期 (1983/12) Pp. 104-115

https://doi.org/10.30069/MM.198312_27(4).0009

摘要

實驗室內，岩石裂痕成長之研究成果有可能被應用到地下（採礦或土木用途）坑室的穩定分析，故岩石破壞理論之探討有其正面價值。過去，坑室張力帶的估計率皆由應力分析着手，然而，若從應變觀點來研究當更能説明岩石破壞之現況。本文對岩石脆性破壞之初步探究係以室内岩石力性實驗數據為依據，基於橢圓狀裂縫及裂縫軸比為0.1之假設前提，從學理上闡明岩石脆性破壞的過程；此外，再自直接應變評估技術來解析坑室盤壁岩體的破壞帶範圍。

並列摘要

Since the conclusions of rock fracture growth in the experiments may be applied to that of the underground openings, the studies of rock failure theories show that will be constructive. The estimation of the extent of fracture zone around openings is usually done by way of the stress analysis, however, it may be preferable if based on the analysis of strain. Using the data obtained from the laboratory tests, and assuming the shape and axis ratio of flaw in rock, the brittle failure of rock may be interpreted with the fracture mechanics, moreover, the failure of underground openings can be analysed from the Direct Strain Evaluation Technique.