水平孔预裂爆破技术在新城金矿二步矿房回采中的应用

In Xincheng gold mine, there are several problems in mining the second-step chamber of V# ore body about the using blasting dropping ore process on construction. They are two working slope tailings collapsing, the difficulty of drilling and charging with tunnel face crushing and roof broken. These problems affect seriously the mining of safety and effective in the second-step chamber of Xincheng gold mine. In order to solve the above problems, we propose that using level borehole prespliting blasting technology of roof and working slope in the second-step chamber. Based on blasting theory and field test, got the parameters of level borehole prespliting blasting. The practice shows that blasting effect of level borehole prespliting blasting is superior the blasting effect smooth blasting. This is a blasting dropping ore process of safe and effective, can meet the needs of safe mining in the mine.