无底柱分段崩落法推墙事故成因及预防措施研究  

Causes and Preventive Measures of Pushing-wall Accident by Sublevel Caving Mining Method

作　　者：王锐 

机构地区：[1]鞍钢矿业爆破有限公司,辽宁鞍山114000

出　　处：《金属矿山》2017年第6期14-17,共4页Metal Mine

摘　　要：在无底柱分段崩落法矿山,中深孔落矿过程中的爆破推墙事故是常见生产事故之一。该事故不仅处理起来比较困难,而且导致大块率增高,严重影响采场生产的正常进行。为解决这一问题,依据扇形炮孔爆破物理模拟试验结果,分析了装药炮孔密度对爆破方向的影响,揭示了扇形中深孔爆破破碎岩体的内在机理,以及形成爆破推墙的根本原因,并以此为据提出了确定扇形炮孔合理装药系数及装药结构的方法。应用实践表明,该方法可有效避免爆破推墙事故的发生,并可显著降低大块率。The pushing-wall accident caused by the medium-deep hole blasting is one of the common accidents in the mines the sublevel caving mining method is adopted. The occurrence of the accidents not only lead to process difficulty,but also increased the large rate,which affect the stope regular production. In order to solve the above problems effectively,according to the fan-patterned hole blasting physical simulation test results,the influence of charge structure to the blasting direction is discussed,and the internal mechanism of the rock mass broken by fan-patterned medium-deep hole blasting is revealed,besides that,the fundamental causes of the formation of pushing-wall accidents are discussed. Based on the above analysis results,the determination method of reasonable charging coefficient and charge structure of fan-patterned hole is proposed. The application results show that the method proposed in this paper is help for avoiding the formation of pushing-wall accidents,and it is also conducive to reducing the large rate remarkably.

关 键 词：无底柱分段崩落法 扇形炮孔 爆破推墙 物理模拟分析 

分 类 号：TD853.36[矿业工程—金属矿开采]