司家营铁矿北区不同自由面前排炮孔参数的探讨

Discussion on Angle Parameters in the Front Line of Different Free Faces in North District of Sijiaying

为了取得更好的爆破效果,前排炮孔位置的选定和穿孔的深度选择是至关重要的,根据露天矿边坡不同形式的自由面和不同的岩性,确定出适合司家营北区地质现状的爆破参数是非常重要的,根据自由面的3种形式(斜面、立面、反斜面)和固定的坡面角α,在同一种岩性下如何圈定合理的爆破参数,保障在以后的爆破施工中取得更好的爆破效果。分析结果可为以后的爆破工作提供借鉴。

In order to achieve a better blasting effect,the selection of the position of the hole in the front row and the depth of the perforation are of great importance.According to the different forms of free surface and different lithology of the open pit slope,it is very important to determine the blasting parameters suitable for the geological status quo in the northern part of Shijiaying.In the following three forms of free surface:slope,facade,backslope and fixed slope angle,how to set reasonable blasting parameters under the same lithology,to ensure better blasting effect in the subsequent blasting construction.The analysis results can provide reference for future blasting.