深孔阶段崩矿孔端后冲带炮原因分析及对策ANALYSIS AND TREATMENTS OF THE BACKBREAKING OF LONGHOLE BENCH BLASTING AT UNDER GROUND MINES
刘庆林,谢源,尤浩生
Liu Qinglin Xie Yuan You Haosheng(Beijing General Research Institute of Mining and Metallurgy,Beijing 100044)
摘要(Abstract)：
深孔柱状装药阶段崩矿炮孔的上下端部附近的矿岩处于侧向崩矿空区和凿岩硐室底板或拉底空间两个自由面状态下，不合理的装药结构将在硐室底板和拉底空间引起后冲带炮。后冲带炮在硐室底板形成的斜面影响后续装药施工，在拉底空间产生大块。结合工程实践分析了后冲带炮的原因及对策。
Backbreak may take place at the top and toe of the longhole because the toe cut and drilling drift is extra free face for bench blasting with column charge for bulk mining method at underground mines.The backbreak reasons and some mathods to avoid backbreak were discussed in this paper.
关键词(KeyWords)：
阶段崩矿,装药结构,后冲带炮
Bench blasting Charge structure Backbreak
基金项目(Foundation):
作者(Author):
刘庆林,谢源,尤浩生
Liu Qinglin Xie Yuan You Haosheng(Beijing General Research Institute of Mining and Metallurgy,Beijing 100044)