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。

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It is pointed out that the comparison and selection of development scheme are very important during the higher stage of engineering design for a mining project.

指出在矿山项目的高阶段设计中，开拓方案比选是非常重要的。

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