摘要
本文以刚果(金)某露天矿为实验地点,首先分析以往爆破震动数据及相关岩性地质等资料,其次在孔深、孔间距、装药量、填塞等参数相同的条件下,分别实施减震沟减震爆破、预裂爆破、无减震措施爆破,对爆破震动数据收集处理并进行分析,研究预裂爆破对爆破震动的作用效果。研究结果表明采用预裂爆破相对正常爆破可以降低13%以上震动峰值;测点与爆心越近,预裂爆破减振效果越大,即受保护建筑物离爆破工程越近,采取预裂爆破措施减震效果越好;预裂爆破比减震沟爆破减震作用小。
In this paper,an open-pit mine in DRC is taken as an experimental site. Firstly,the data of previous blasting shock and related lithology and geology information are analyzed. Secondly,under the condition of the same parameters such as hole depth,hole spacing,charge and packing,the blasting with shock damping ditch,pre-splitting blasting and blasting without shock damping measures are carried out respectively. The blasting shock data are collected,processed and analyzed,and the shock damping effect of pre-splitting blasting is studied. The results show that pre-splitting blasting can reduce the shock peak value by more than 13% compared with normal blasting;the closer the measuring point to the blasting center,the greater the shock damping effect of presplitting blasting,viz. the closer the protected building to the blasting works,the better the shock damping effect of pre-splitting blasting;and pre-splitting blasting has less shock damping effect than blasting with shock damping ditch.
作者
张怀东
马恒
ZHANG Huaidong;MA Heng
出处
《中国矿山工程》
2021年第4期17-20,共4页
China Mine Engineering
关键词
爆破震动
震动危害
预裂爆破
减震沟爆破
blasting shock
shock hazard
pre-splitting blasting
blasting with shock damping ditch
