中部引黄工程马蹄形小断面引水隧洞光面爆破设计与试验

Smooth Blasting Design and Test for Water Drawing Tunnel with Small Horseshoe Section in Central Yellow River Diversion Project

中部引黄工程某标段输水隧洞工作面狭窄,地质条件差,为取得良好的爆破施工效果,节约炸药、人工等消耗量,控制施工成本,需科学合理设计爆破参数,并通过试验逐步复核确定,以指导现场施工。主要介绍了马蹄形断面的光面爆破设计,包括炮眼布置、装药结构、起爆方式,根据现场实际爆破效果对理论设计参数进行调整,形成了适用的爆破参数。

The working face of the water conveyance tunnel in a section of Central Yellow River Diversion Project is narrow and the geological conditions are poor.In order to obtain good blasting construction effect,save explosives,labor and other consumption,and control the construction cost,it is necessary to design blasting parameters scientifically and reasonably,and gradually recheck and determine them through tests,so as to guide the site construction.This paper mainly introduce the smooth blasting design of the horseshoe section,including the blast-hole-arrangement plan,charging structure and initiation mode,the theoretical design parameters are adjusted according to the actual blasting effect,and the applicable blasting parameters are formed.