预裂控制爆破技术在靠帮边坡中的应用实践

Application Practice of Pre-Splitting Blasting Technique in Ending Slope

摘要: 秀山石灰石矿在开采过程中，受爆破及采动影响，台阶的边坡成型完整性较差，影响边坡的整体稳定性，给矿山安全开采造成了一定的威胁。针对此问题，根据矿山工程地质条件，确定了合理的爆破工艺参数，同时采用密集预裂孔不耦合装药结构的控制爆破工艺技术以及预裂孔、主炮孔微差爆破的起爆方式，在预裂控制爆破后实现了完整性较好的预裂孔及靠帮边坡，有效提高了台阶靠帮边坡的围岩完整性和稳定性，保障了矿山开采的安全性，该技术手段对类似露天矿山靠帮边坡的稳定性控制具有一定的借鉴意义。

Abstract: In the mining process of Xiushan limestone mine, affected by blasting and mining, the slope formation integrity of the steps is poor, which seriously affects the stability of the slope and poses a certain threat to mining safety. Aiming at this problem, according to the engineering geological conditions in mines, millisecond blasting is used in the pre-splitting and main blasting drills, forming integrity slope surface in the process of blasting, which implements long-term stability of the steps slope, effectively guaranteeing mining safety. There is a certain referential significance for similar slope stability controlling in open-pit mine.