溢洪道开挖爆破块度级配控制研究  

STUDY ON CONTROL OF FRAGMENTATION GRADATION IN EXCAVATION OF A SPILLWAY BY BLASTING

作　　者：李保林 刘治峰 郭永为 张永哲[2] 

机构地区：[1]河北省水利工程局,石家庄050021 [2]中国水利水电科学研究院,北京100044

出　　处：《工程爆破》2004年第1期41-43,76,共4页Engineering Blasting

摘　　要：采用深孔梯段爆破进行溢洪道扩挖时 ,根据岩体的力学特性和工程要求 ,制定合理的爆破方案 ,正确选择爆破参数 ,并采取一系列技术措施控制其特征尺寸 ,使爆破石碴具有一定的块度级配。用YS— 1型压实计检测和灌水法抽验的结果表明 ,碾压 4～ 6遍后的石碴干容重大于 2 0kN/m3,达到较高的填筑密实度 ,完全满足工程要求。On the basis of rockmass characteristics and engineering demands,through working out reasonable blasting plan,selecting correct blasting parameters and using a series of technological measures for control of fragmented rock's characteristic size,the fragmentation gradation can be controlled in excavation of a spillway by deep-hole bench blasting.The results of detection by YS-1 compactness meter and sampling inspection by water-poring method shows that the fragmented rock rolled at 4～6 times has a high compactedness and a dry density of larger than 20 kN/m^3,meeting the demands for dam construction.

关 键 词：溢洪道 开挖爆破 块度级配控制 深孔梯段爆破 力学特性 爆破参数 

分 类 号：TV542[水利工程—水利水电工程]