硐室爆破技术在开采砼面板堆石坝填筑料的应用

APPLICATION OF CHAMBER BLASTING TECHNOLOGY TO FILLING MATERIAL MINING FOR CONCRETE FACE ROCK-FILL DAM

井冈山水电站砼面板堆石坝,筑坝级配石料开采选用硐室爆破,取得成功。以一次性爆破开采面板堆石坝填筑石料为例,介绍了硐室爆破的爆破参数、起爆网路的设计,爆破的效果及需要改进的相关爆破参数。为类似工程的爆破设计提供了可借鉴的经验。

The paper presented a successful determination of the employment of chamber blasting for extraction of dam grade stone on the concrete faced rock-fill dam of Jinggangshan Hydropower Station. Taking this as an example of mining CFRD filling stone by one-time blasting, the paper discussed its blasting parameters, initiating network design, blasting effects and some of its blasting parameters which needed to improve. The successful experience of this project has reference to similar engineering.