摘要
在较软弱岩石中开凿巷道平壳碹岔，具有工程量小、施工速度快的优点，对于单线巷道用喷射混凝土支护时尤为适用。在玉石洼铁矿所施工的５０多个平壳碹岔使用效果良好。
The excavation of the arch crossings in the more weak rocks can be completed with less work amount and with more high speed,especially for the one-way roadways lined with the shotcrete. Now more than fifty flat-cover crossings constructed in the Yushiwa iron mine are all in effective operation.
出处
《冶金矿山设计与建设》
1995年第2期49-50,共2页
Metal Mine Design & Construction
