In the deep hole step-by-step mining of thick and large ore-body, because of the serious over-excavation or under-excavation after the first-step room mining, the second-step pillar stope became a very irregular shape. Thereby, the blasting design of pillar extraction was affected seriously. By way of cavity monitoring system (CMS) situ measuring, the both sides of adjacent cavities practical shape were determined accurately. The three-dimensional cavity model was built by DIMINE, and after the Boolean operation with the three-dimensional model of designed stope, the practical shape of pillar was determined. Then, the deep hole and medium-deep hole blasting mining scheme was designed by DIMINE, and the blasting design report and construction drawings of pillar stope mining were generated at the meantime. As a result, the quality of hole arrangement and the work efficiency were greatly improved.%厚大矿体采用中深孔分步骤开采时,往往由于一步骤矿房开采存在不同程度的超挖或欠挖情况,导致二步骤待采矿柱的实际形态极不规则,影响到矿柱回采的爆破设计.利用三维激光探测系统(CMS)对某铜矿第一步骤采空区的现场测量,准确地确定矿柱相邻两侧空区形态,通过DIMINE生成空区模型,将该模型与设计采场三维实体模型进行布尔运算后建立了矿柱的三维实体模型.然后利用DIMINE进行了深孔和中深孔爆破回采方案设计,生成了矿柱采场爆破设计报告和施工图,提高了布孔质量和工作效率.
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