中孔径浅孔爆破施工技术  

Blasting Construction Technology of Short-hole with Medium Diameter

作　　者：李付安 李献稳 

机构地区：[1]中国核工业华兴建设有限公司,南京210019

出　　处：《爆破》2013年第3期80-83,共4页Blasting

摘　　要：田湾核电站排UQP水暗沟岩石段为梯形断面,最大挖深9.1 m,底宽20.8 m,顶宽27.3 m。针对施工中邻近建(构)筑物,爆破施工环境复杂、工期紧、质量要求高的特点,通过方案对比,在施工中采用了中孔径浅孔松动爆破方案,即采用小梯段(3 m)、中孔径(89 mm)浅孔松动爆破,底部预留垂直保护层,边壁预裂爆破。通过选取合理的爆破参数,采用孔内外微差爆破技术,严格控制爆破飞石和爆破振动,取得了良好的爆破效果。The rock section of UQP drainage ditch of In this paper the Tianwan Nuclear Power Plant is a trape- zoidal cross-section, the maximum digging depth is 9.1 m, the bottom width is 20.8m and the top width is 27.3 m. The construction surrounding is complex and close to some buildings, the loose blasting scheme with shallow hole and medium diameter is chosen through schemes comparison, where the small bench height （3 m） and medium di- ameter （89 mm） are designed, and the protective layer and presplitting blasting near side wall are performed, in ex- cavation construction of adjacent building （ structure ） building, blasting construction environment complex charac- teristics, in construction, the aperture short-hole loose blasting schemb. Through the selection of reasonable blast pa- rameters and the delay initiation inside and outside hole, the good blasting effect is obtained with strictly controlling of blasting flyrock and blasting vibration.

关 键 词：复杂环境 岩石开挖 中孔径浅孔爆破 

分 类 号：TD235.371[矿业工程—矿井建设]