云南冶金2026，Vol.55Issue(1)：14-21,8.
云南某锡矿盲切割井一次成井爆破技术研究
Study on One-pass Shaft Sinking Blasting Technology for a Blind Cut-off Shaft in a Yunnan Tin Mine
杨智勇 1张素平1
作者信息
- 1. 云南锡业股份有限公司大屯锡矿,云南个旧 661021
- 折叠
摘要
Abstract
To address the problems of low drilling efficiency and poor safety encountered in the excavation of a blind cut-off shaft in a Yunnan tin mine,experimental tests were conducted using 7-hole,6-hole,and 9-hole barrel cut blasting patterns.The results show that the 9-hole barrel cut achieved the largest comprehensive caving volume and the best blasting performance.A full-face blind cut-off shaft blasting test was carried out using the 9-hole barrel cut pattern for a shaft with a designed depth of 8.0 m and a cross-section of 1.8 m × 1.8 m.After blasting,the actual shaft depth reached 7.8 m,and the cross-sectional area was approximately 2.9～3.3 m2,which effectively improved construction safety and efficiency.关键词
一次成井/桶形掏槽/大直径空孔/分层起爆Key words
one-pass shaft sinking/barrel cut blasting/large-diameter empty hole/staged detonation分类
矿业与冶金引用本文复制引用
杨智勇,张素平..云南某锡矿盲切割井一次成井爆破技术研究[J].云南冶金,2026,55(1):14-21,8.
