爆破2025，Vol.42Issue(2)：67-72,157,7.DOI:10.3963/j.issn.1001-487X.2025.02.008
平坦原抽水蓄能电站工程爆破超大块控制技术
Control Technology for Oversized Fragments in Engineering Blasting at Pingtanyuan Pumped-storage Power Station Project
摘要
Abstract
The occurrence of oversized fragments during blasting operations significantly increases the cost of blasting,crushing,and hauling expenses.This study addressed the slab'phenomenon observed in the blasting of in-tact hard rock at the Pingtanyuan Pumped Storage Power Station,where the oversized fragments of the surface blasting area was up to 6 m ×5 m ×2.5 m.Through comprehensive mechanism analysis,the investigation indicated that the quality of the stemming was the key reason for forming large fragments at the upper part.Meanwhile,the mechanism of its influence lies in the over-long stemming length of the original blasting scheme,which resulted in a low charge center,leading to insufficient energy distribution at the top of the blast hole.Furthermore,an oversized blasting frag-ments control measurement based on stemming quality optimization was proposed.The stemming length was optimized from 3～4 m to 2.1～2.4 m using a time-sharing piecewise calculation method and the optimization principle,which allowed the part of the stemming structure to rush out of the blast hole.Besides,the decontaminated rock chips were used as stemming material.The results show that the optimized scheme prevented the occurrence of the slab phenom-enon,significantly reduced boulder rates,and saved rock breakage costs.关键词
完整硬质岩/爆破/超大块/堵塞长度Key words
intact hard rock/blasting/oversize blasting fragments/stemming length分类
建筑与水利引用本文复制引用
谭展志,张光辉,陈明,张家托,程远龙..平坦原抽水蓄能电站工程爆破超大块控制技术[J].爆破,2025,42(2):67-72,157,7.基金项目
国家自然科学基金企业创新发展联合基金(U24B20110) （U24B20110）
国家自然科学基金面上项目(51979205) National Natural Science Foundation of China(U24B20110),National Natural Science Foundation of China(51979205) （51979205）
