束状孔当量球形药包爆破技术回采切割槽在大红山铜矿的应用研究

大红山铜矿体属于多层缓倾斜矿体,在矿山多年生产实践中不断摸索总结切割槽回采技术,但目前厚大矿体盘区切割槽回采采用纯浅孔留矿法或高切割天井提供补偿空间的侧向崩矿技术,存在安全风险高、施工进度慢、成本高、作业条件差等缺点,本文提出采用束状孔进行回采,很大程度上克服了上述缺点。

Research on Application of Mining Cutting Groove by blasting technique of Bunch-hole Equivalent Spherical Charge in Dahongshan Copper Mine

The orebody of Dahongshan Copper Mine belongs to multilayer and gently inclined type,and conti-nuing efforts have been made to improve the technique of cutting groove for years.At present,the cutting grooves are excavated by shrinkage method with shallow holes,or lateral caving technique in which a high shaft provides the first compensate space.However,it has been found that these techniques have some disadvantages such as safety risk,slow construction progress,high cost and poor operation condition.In this paper,a new technique that can remedy above disadvantages greatly by using a bunch hole mining is proposed,and details on the new technique are presented.