大断面巷道(硐室)超挖原因分析及其控制措施探讨

Analysis of the cause of over excavation of large section tunnel and controlling measures adopted

从新城金矿主斜坡道超挖现状入手，分析造成超挖的原因，提出减少大断面巷道（ 硐室） 掘进施工超挖的具体措施，以提高矿山综合经济效益。

Begining with the current situation of the over excavation of main ramp,the analysis of the cause of over excavation was made and measures for reducing over excavation in the construction of large section tunnel were brought forward.