小湾水电站坝肩抗力体爆破试验

The Dam Abutment Force-resisting Mass Blasting Test in Construction of the Xaowan Hydropower Project

小湾水电站坝肩抗力体地下洞(井)塞开挖爆破均是在缺陷岩体中进行,在爆破开挖施工过程中,支护、回填灌浆、衬砌(回填)混凝土等工序与开挖爆破交替进行。为避免爆破对其它工序造成影响,保证施工安全,必须要进行相应的爆破试验和安全监测,通过对试验及监测成果数据分析,优选爆破方案。

Excavation blasting of the underground cavern（shaft） plugs located in the dam abutment force - resisting masses was al/carried out within defected rock masses in construction of he Xiaowan hydropower project. In the course of blasting and excavation supporting work, backfill grouting, lining（backfilling） and concrete placement were performed al- ternatively. In order to avoid any adverse influence caused by blasting on the working procedure and ensure construction safety corresponding blasting test and safety monitoring were done. The optimum blasting alternative was selected based on the test and monitoring results.