光面爆破在边坡控制中的实践

The Practice of Smooth Surface Blasting for Controlling the Side Slope

在露天矿山爆破过程中,临近边坡的爆破施工相对来说比较严格,既要杜绝超、欠挖,又要防止破坏边坡基岩而造成的坍塌,因此,在爆破时往往会留有一定厚度的缓冲带。如非洲某露天矿在边坡施工时,为避免爆破对边坡的损伤,预留3m厚缓冲带,待爆破后利用液压锤进行修整。此种办法虽然能够完整地保护边坡不受爆破冲击波破坏,但施工效率非常低,严重制约了工程进度。为提高效率,采用光面爆破技术于边坡施工中,通过实践,取得了较好的效果。

In the blasting process of open pit mine, the blasting construction near the slope is relatively strict. In order to avoid ＂the collapse caused by ＂the overexcavate or underexcavate and prevent to destroy ＂the slope bedrock, ＂the buffer zone with a certain ＂thickness will be left in ＂the blasting. Such as in some open pit mine in Africa , in order to avoid ＂the demage for ＂the side slope caused by ＂the blasting, ＂the 3 m ＂thickness buffer zone shall be left, and adjusted by ＂the hydraulic hammer after ＂the blasting. Although ＂this method could completely protect the slope from blasting shock wave, the construction efficiency is very low, which seriously restricts the progress of the project. In order to improve the efficiency, the smooth surface blasting technique is adopted in the slope construction. Which has been proved in practice.