The reasonableness and limitations of the failure criterion for rock in terms of stress are described and it is emphasized that development of failure criterion in terms of strain has been of great significance on rock engineering design.
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Study on rock features is premise and basis for mining project design and research. Selection of rational mechanical parameters of rock is very important for safety and economy of engineering.
岩体特性研究是工程设计和研究的前提和基础，岩体力学参数取值合理与否，直接关系到工程的安全性和经济性。
The authors put forward that full coupling analysis method and optimization design idea for the safety problem of underground roadway engineering, on base of rock engineering system (RES) theory.
针对巷道工程安全稳定性问题，基于岩石工程系统(RES)理论，提出了全耦合分析方法。
Based on rock engineering system (RES) theory, a full coupling analysis method and optimization design idea for the stability problem of underground roadway engineering are put forward.
针对地下巷道工程稳定性问题，基于岩石工程系统(RES)理论，提出了全耦合分析法及优化设计思想。
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