某矿区工程稳定性分级方法及其在巷道支护中的应用

A Mining Engineering Stability Classification Method and its Application in Tunnel Support

建立了某矿区工程稳定性分级的数值模型,据数值计算结果中的安全系数分级得出了该矿区-430m水平的安全系数分级区域图;运用RMR分级和Q分级2种方法对该矿区-430 m水平进行分级,综合2种分级结果,得出了该水平的岩体分级区域图。将-430 m水平的安全系数分级区域图与该水平的综合岩体分级区域图叠加得出了该水平的工程稳定性分级,同时制定了相应工程稳定性分级下的巷道支护方法,为井下巷道的正确支护提供了依据。

The numerical model of a mining engineering stability classification is established. According to the safety coefficient classification from the numerical calculation results, the classification area map with the safety coefficient for - 430 m level mining area is drawn, and the - 430 m level mining area is classified with RMR classification and Q classifica- tion. Combining with the two classification results, the -430 m level＇s rock mass classification area map with the safety co- efficient is overlaid on that of the comprehensive rock mass to gain the engineering stability classification of - 430 m level. Meanwhile, the tunnel support method with the corresponding engineering stability classification is given, thus providing a reference for right underground tunnel support.