金山金矿掘进爆破参数优化及应用  

Optimization and application of drilling and blasting parameters in Jinshan Gold Mine

作　　者：闵忠鹏 王柏平 张永亮 吴迪 Min Zhongpeng;Wang Boping;Zhang Yongliang;Wu Di(Zhongjin Gold Corporation Limited;School of Civil and Environmental Engineering,University of Science and Technology Beijing;School of Mechanical&Automotive Engineering,Qingdao University of Technology)

机构地区：[1]中金黄金股份有限公司 [2]北京科技大学土木与环境工程学院 [3]青岛理工大学机械与汽车工程学院

出　　处：《黄金》2024年第6期16-22,共7页Gold

基　　金：国家自然科学基金项目(52374209);山东省自然科学基金项目(ZR2023ME012)。

摘　　要：针对金山金矿掘进爆破中存在的巷道超挖、进尺不达标和岩石过度破碎等问题,在-155 m中段进行了爆破漏斗试验,确定爆破参数范围,通过LS-DYNA数值模拟软件建立炮孔堵塞模型,根据不同延期时间的应力云图及全断面岩石损伤云图优化金山金矿的掘进爆破参数,最后进行现场试验验证全断面优化后爆破参数的普适性。结果表明:全断面优化后的掘进爆破参数能够满足矿山的生产要求,巷道断面平整,爆堆比较集中、岩石块度均匀,延期时间在100 ms以下能保证应力波的叠加,掘进爆破的平均炸药单耗从3.28 kg/m^(3)下降至2.92 kg/m^(3),降幅达12.3%;单位体积消耗雷管量从2.28发/m^(3)降为1.97发/m^(3),降幅15.4%。爆破效果较好,可在矿山推广应用。In response to issues such as over-excavation,inadequate excavation footage,and excessive rock fragmentation in the excavation and blasting of Jinshan Gold Mine,a blast funnel test was conducted at-155 m level to determine the range of blasting parameters.Using LS-DYNA numerical simulation software,a blast hole plugging model,stress cloud charts for different delay times,and full-section rock damage cloud charts were established to optimize the excavation and blasting parameters of Jinshan Gold Mine.Finally,field tests were conducted to verify the universality of the optimized blasting parameters.The results show that the excavation and blasting parameters optimized for the entire section can meet the production requirements of the mine,with smooth excavation sections,concentrated blasting piles,uniform rock blocks,and stress wave superposition ensured for delay times below 100 ms.The average explosive consumption per unit volume of excavation and blasting decreased from^(3).28 kg/m^(3)to 2.92 kg/m^(3),a decrease of 12.3%;and the unit volume consumption of detonators decreased from 2.28 units/m^(3)to 1.97 units/m^(3),a decrease of 15.4%.The blasting effect is good and can be widely applied in the mine.

关 键 词：巷道掘进 爆破漏斗试验 爆破参数 LS-DYNA数值模拟 钻爆法 

分 类 号：TD235[矿业工程—矿井建设]