交叉巷道暴露面积大，开挖表面光滑性差，是应力集中的多发区域，在脆性岩体环境下容易发生岩爆。合理的支护方式能改善围岩环境，防止岩爆发生，在选择支护方式上采用flac3D数值模拟软件对不同支护方式进行分析比较，同时使用FISH语言从能量、应力等方面岩爆预测判据内置于所建模型的单元体内，在比较岩爆判据的灵敏性的同时优选出合适的韧性支护方式。该分析方法在使用岩爆判据来优选支护结构，优化支护方式做出了尝试，效果明显。%The exposed area of cross tunnel is large, the smooth of the surface in excavation is poor, there is stress-prone regions, are prone to be rock outburst in brittle rock, and rational support methods can improve surrounding rock environment, prevent rock explosion occurred. On the selecting support method, it uses flac3D numerical simulation software for analysis and comparison on different supporting methods, uses FISH language to make rock explosion criterion insetthe unit of the model, and slects suitable toughness of supporting method when comparing sensitivity of rockburst criterion. The analysis method has made attempts to slect support structure, and optimize support method, using rock burst criterion, the effect is obvious.
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