舟山绿色石化基地凝灰岩露天矿山靠帮边坡爆破技术研究

Study on blasting technology of side slope in surface tuff mines of Zhoushan green petrochemical base

为有效维护靠帮边坡稳定,降低爆破对保留区岩体的损伤破坏,在不同地质条件下的边坡应采用不同的爆破方法。本文通过舟山绿色石化基地凝灰岩露天矿山靠帮边坡爆破技术研究,对边坡坡率小、风化程度大、节理裂隙发育的表层边坡采用预留孔底保护层缓冲爆破,对坡率大、风化程度弱、岩石较为完整的中下层边坡采用光面(预裂)爆破,均较好地保护了靠帮边坡的稳定,取得了较好的经济效益和社会效益,对以后类似边坡的施工具有一定的指导意义。

In order to effectively maintain the stability of the slope and reduce the damage and damage of the blasting to the rock mass in the reserved area,different blasting methods should be used in the slope under different geological conditions.In this article,through the study of the blasting technology of the surface tuff mines in Zhoushan green petrochemical base,the surface slope with small slope rate,high weathering degree and joint fracture development adopts the buffer blasting of reserved hole bottom protective layer,which adopts smooth surface(pre-cracking) blasting on the middle and lower slope with large slope rate,weak weathering degree and complete rock,which better protects the stability of the slope and obtains good economic and social benefits,is a model to help the slope blasting construction,which has certain guiding significance for the construction of similar slope in the future.