三锅桩面板堆石坝石料开采特殊硐室爆破

SPECIAL CHAMBER BLASTINGS IN EXPLOITATION OF ROCK MATERIAL FOR EMBANKMENT OF SANGUOZHUANG CONCRETE FACE ROCKFILL DAM

在三锅桩水库堆石坝修筑用料的开采中 ,进行了两次特殊的硐室爆破。第 1次硐室爆破的目的是处理上次不成功的硐室爆破产生的残爆堆。在确保安全的条件下 ,残爆堆得以完全破碎。第 2次硐室爆破的目的是在特定的地质条件下利用硐室爆破获取面板坝垫层料。爆后 ,有 70

In exploitation of rock material for embankment of rockfill dam of Sanguozhuang reserovir,two special chamber blastings were carried out The aim of first chamber blasting is to treat the remaining broken piles resulted from the unsuccessful previous chamber blasting In the condition of ensuring the safety,the remaining broken piles were completely crushed The purpose of second chamber blasting is that it is used to obtain the wadding rock material of concrete face dam for special geological conditions After blasting,70% of broken rock material can be directly utilized,without second crushing,for filling of the wadding layer