基于爆破漏斗试验的深孔爆破参数选择  

Parameter Selection of Deep-hole Blasting Based on Blasting Crater Test

作　　者：付宏宁 刘海洋 侯志永 匡正平 刘再道 杨帆 马云超 刘东锐 张为星 FU Hongning;LIU Haiyang;HOU Zhiyong;KUANG Zhengping;LIU Zaidao;YANG Fan;MA Yunchao;LIU Dongrui;ZHANG Weixing(Shaoguan Jinyuan Uranium Co.,Ltd.,CNNC,Shaoguan 512329,China;Changsha Institute of Mining Research Co.,Ltd.,Changsha 410012,China)

机构地区：[1]中核韶关锦原铀业有限公司,广东韶关512329 [2]长沙矿山研究院有限责任公司,湖南长沙410012

出　　处：《铀矿冶》2023年第4期8-12,共5页Uranium Mining and Metallurgy

摘　　要：在采用深孔爆破回采时,爆破参数一般由炮孔直径推导的经验值确定,存在爆破质量偏低的问题。笔者进行了爆破漏斗试验,由单孔爆破漏斗试验得到装药质量为300 g的药包的最佳埋深为0.65 m,最佳漏斗半径为0.63 m;由变孔距多孔同段爆破试验得出最佳孔间距为0.9~1.0 m,最佳孔间距与最佳漏斗半径的比为1.43~1.59;由斜面台阶爆破试验初步得到最佳的最小抵抗线为0.41 m。基于爆破相似定律,计算得到直径65 mm深孔的最佳孔间距为1.7 m;考虑到斜面台阶爆破试验结果不理想,采用扇形布孔的孔底密集系数经验值(1.0~1.3)计算后,推荐深孔爆破排距为1.3 m。Deep-hole blasting is used in the mining of hard rock uranium ore in Mianhuakeng mine,the blasting parameters are derived from the experience value of the diameter of the blasting hole,which has the problem of low blasting quality.The optimum depth and radius of 300 g charge are 0.65 m and 0.63 m respectively from the single hole blasting crater test,the optimum distance between holes is 0.9~1.0 m and its ratio to the optimum crater radius is 1.43~1.59 from the multi-hole blasting test with variable hole spacing,the optimum minimum resistance line from the slope step blasting is 0.41 m.Based on the blasting similarity law,the optimum hole spacing of 65 mm deep hole is calculated to be 1.7 m.Considering that the test results of slope step blasting are not ideal,the empirical value of hole bottom density coefficient of fan-shaped hole layout is 1.0~1.3,and the row spacing of deep-hole blasting is recommended to be 1.3 m after calculation.

关 键 词：硬岩矿山 深孔爆破 爆破漏斗试验 爆破参数 

分 类 号：TD868[矿业工程—金属矿开采]