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本文介绍的硐室工程是平顶山地区的一特大硐室,结构复杂,所通过的地质条件差,采用先墙后(?)分别施工,施工时先掘导硐,后用钻爆法达到设计断面。
The chamber project introduced in this paper is a special large chamber in Pingdingshan area. Its structure is complex and the geological conditions passed are poor. Construction is carried out after the first wall (?). When excavation is carried out, the tunnel is digged first, .