改善红砂岩爆破破碎效果的几种方法

通常在路堑石方开挖中采用深孔爆破、浅孔爆破、药壶爆破、竖井爆破四种爆破方法。本文根据笔者的实践经验,分析影响红砂岩破碎度的主要因素,提出了改善四种爆破方式破碎效果的适用方法,并结合实际对这几种爆破方式进行了综合比较。通过实践可知,无论采用哪种爆破方法,只要爆破参数选择合理、措施得当,均可取得良好的破碎效果。

BIDIRECTIONAL THREE-FOLDED BLASTING DEMOLITION OF 158M HEIGHT REINFORCED CONCRETE CHIMNEY

The chimney of 158m height in reinforced concrete was demolished by controlled blasting through dividing it into three sections which were apt to collapse in two directions based on the chimney's feature and its surroundings.This paper analyzed the collapse direction,the three blasting cuts in terms of their shapes,locations and parameters,the control of blasting interval,primer location and the measures of safety protection as well as the blasting effect.The blasting saw a very successful result and can be referred by engineering of the kind.