深孔爆破间隔装药技术探讨

某场平土石方深孔爆破施工期间,恰逢爆破器材价格上涨,如何节约爆破成本是此工程面临的主要问题。在某些爆破参数确定的条件下,施工中摸索出空气间隔装药结构能降低炸药单耗,同时保证了破碎效果。通过不同装药结构经济性对比分析,表明深孔爆破间隔装药技术在技术、经济上是可行的,值得推广。

STATISTICS AND ANALYSIS ON BORE-HOLES OF LARGE-SCALED SOIL AND ROCK BLASTING PROJECT

In order to find the deviation of unit explosion consumption and blasting stone quantity of pre-meter between actual value and estimated value.Bore-holes statistics of a large-scaled cubic meter of earth and stone project in north china were carried out according to construction progress.The relation of hole-depth and blasting stone quantity of pre-meter was analyzed.It was found that high proportion of bore-holes less than 5m deep was main factor that induced comprehensive blasting stone quantity of pre-meter.So it can draw a conclusion that comprehensive blasting stone quantity of pre-meter can be increased effectively through optimization and combination and decreasing quantity of shallow bore-holes in the condition of given hole grid parameter and bench height to flat gradient bench blasting project.The conclusion points out direction for reducing cost of flat gradient bench blasting project.