YE Hai-wang;LI Ya-wei;LU Dong;YU Yan;ZHANG Zhi-mou;YU Meng-hao;LEI Tao;WANG Qi-zhou;LI Ning;

• 1:School of Resources and Environmental Engineering
• 2:Wuhan University of Technology
• 3:Ministry of Education Key Laboratory of Key Non-metallic Mineral Resources Green Utilization
• 4:Hubei Key Laboratory of Mineral Resources Processing and Environment

Abstract：

In a limestone aggregate quarry,excessive fines generation following blasting was primarily caused by extensively developed joint fractures and prolonged implementation of continuous coupled charging configurations. To minimize the generation of blasting fines and improve rock fragmentation,a small-diameter charge technology was developed based on the principles of decoupled charge blasting. Firstly,a fragmentation-damage correlation model for blast-induced fractured rock mass was developed in ANSYS/LS-DYNA based on field-collected measurement data.Secondly,numerical simulations were conducted to evaluate the blasting performance of the small-diameter charge structure relative to traditional decoupled charge methods,thereby confirming the technical viability of the proposed small-diameter charging approach. Thirdly,numerical simulations were conducted to determine the correlation between segmented small-diameter charge lengths and fines generation rates,thereby enabling technical optimization.Finally,field verification tests were conducted in accordance with simulation findings to assess the performance of the refined small-diameter charging method. Numerical simulations demonstrate that the small-diameter charging technique provides superior control over rock fragmentation,with the optimal dust reduction achieved using a dual-segment 2. 0 m small-diameter charge configuration. Field tests demonstrate that employing a dual-segment 2. 0 m smalldiameter charge configuration reduces blasting fines generation by 6. 53 percentage points compared to conventional continuous coupled charging,while maintaining comparable boulder yield,offering practical guidance for similar aggregate quarry operations.

Key Words： aggregate quarry;fines generation rate;small diameter charge;blasting simulation;rock damage

Abstract:

Keywords:

Foundation: 地球深部探测与矿产资源勘查国家科技重大专项(2025ZD1010901、2024ZD1003802)~~

Authors: YE Hai-wang;LI Ya-wei;LU Dong;YU Yan;ZHANG Zhi-mou;YU Meng-hao;LEI Tao;WANG Qi-zhou;LI Ning;

References：

• [1]郝芳．建筑用碎石骨料矿山投资评价方法及可持续发展研究[D]．北京:中国地质大学(北京)，2013．[1]HAO Fang.A study on investment evaluation method and sustainable development of crushed stone for construction[D].Beijing:China University of Geosciences(Beijing),2013.(in Chinese)
• [2]戴俊．柱状装药爆破的岩石压碎圈与裂隙圈计算[J]．辽宁工程技术大学学报(自然科学版)，2001(2):144-147．[2]DAI Jun.Prevention and control mechanism of deep-hole blasting in deep mining[J].Journal of Liaoning Technical University(Natural Science),2001 (2):144-147.(in Chinese)
• [3]楼晓明，马建军．裂隙岩体不耦合装药的爆破破坏分区计算[J]．矿业研究与开发，2004(4):50-53．[3]LOU Xiao-ming,MA Jian-jun.The damage zones calculation of uncoupled charge bl-asting in fractured rock[J].Mining Research and Development,2004 (4):50-53.(in Chinese)
• [4]宗琦，田立，汪海波．水介质不耦合装药爆破岩石破坏范围的研究和应用[J]．爆破，2012,29(2):42-46．[4]ZONG Qi,TIAN Li,WANG Hai-bo.Study and application on rock damage range by blasting with water-decoupled charge[J].Blasting,2012,29(2):42-46.(in Chinese)
• [5]王皓永，任晓玲，沈强，等．基于空气间隔优化的骨料用灰岩爆破粉矿率控制[J]．爆破，2023,40(4):110-114,223．[5]WANG Hao-yong,REN Xiao-ling,SHEN Qiang,et al.Control of blasting powder rate of limestone for aggregate based on air decking optimization[J].Blasting,2023,40(4):110-114,223.(in Chinese)
• [6]罗志华，史秀志，陈飞，等．径向不耦合装药对粉矿控制的影响研究[J]．爆破，2020,37(3):47-55．[6]LUO Zhi-hua,SHI Xiu-zhi,CHEN Fei,et al.Study on influence of radial decoupling charge on fine ore control[J].Blasting,2020,37(3):47-55.(in Chinese)
• [7]尹岳降，夏文俊，卢文波，等．灰岩矿爆破开采岩粉成因及其控制研究[J]．工程爆破，2021,27(6):44-51．[7]YIN Yue-xiang,XIA Wen-jun,LU Wen-bo,et al.Study on genesis and control of rock powder of limestone mine during rock blasting[J].Engineering Blasting,2021,27(6):44-51.(in Chinese)
• [8]杨跃宗，邵珠山，熊小锋，等．岩石爆破中径向和轴向不耦合装药的对比分析[J]．爆破，2018,35(4):26-33,146．[8]YANG Yue-zong,SHAO Zhu-shan,XIONG Xiao-feng,et al.Comparison of radial a-nd axial uncoupled charge in rock blasting[J].Blasting,2018,35 (4):26-33,146.(in Chinese)
• [9]郑虹，冯夏庭，陈祖煜．岩石力学室内试验ISRM建议方法的标准化和数字化[J]．岩石力学与工程学报，2010,29(12):2456-2468．[9]ZHEN Hong,FENG Xia-ting,CHEN Zu-yu.Standardization and digitization for ISRM suggested methods of rock mechanics laboratory tests[J].Chinese Journal of Rock Mechanics and Engineering,2010,29 (12):2456-2468.(in Chinese)
• [10]梁为民，LIU Hong-yuan，周丰峻．不耦合装药结构对岩石爆破的影响[J]．北京理工大学学报，2012,32(12):1215-1218,1228．[10]LIANG Wei-min,LIU Hong-yuan,ZHOU Feng-jun.Influence of air-decoupling charge on rock blasting[J].Transactions of Beijing Institute of Technology,2012,32 (12):1215-1218,1228.(in Chinese)
• [11]姜鹏飞，唐德高，龙源．不耦合装药爆破对硬岩应力场影响的数值分析[J]．岩土力学，2009,30(1):275-279．[11]JIANG Peng-fei,TANG De-gao,LONG Yuan.Numerical analysis of influence of un-coupled explosive-charge structure on stress field in hard rocks[J].Rock and Soil Mechanics,2009,30(1):275-279.(in Chinese)
• [12]王志亮，李永池．工程爆破中径向水不耦合系数效应数值仿真[J]．岩土力学，2005(12):1926-1930．[12]WANG Zhi-liang,LI Yong-chi.Numerical simulation on effects of radial water-decoupling coefficient in engineering blast[J].Rock and Soil Mechanics,2005 (12):1926-1930.(in Chinese)
• [13]杨国梁，杨仁树，姜琳琳．轴向间隔装药爆破沿炮孔的压力分布[J]．爆炸与冲击，2012,32(6):653-657．[13]YANG Guo-liang,YANG Ren-shu,JIANG Lin-lin.Pressure distribution along borehole with axial air-deck charge blasting[J].Explosion and Shock Waves,2012,32(6):653-657.(in Chinese)
• [14]吴亮，卢文波，钟冬望，等．混凝土介质中空气间隔装药的爆破机理[J]．爆炸与冲击，2010,30(1):58-64．[14]WU Liang,LU Wen-bo,ZHONG Dong-wang,et al.Study of concrete damage under b-last loading of air-decking[J].Explosion and Shock Waves,2010,30(1):58-64.(in Chinese)
• [15]杨国梁，程帅杰，王平，等．切缝管轴向不耦合装药爆破实验[J]．爆炸与冲击，2017,37(1):134-139．[15]YANG Guo-liang,CHENG Shuai-jie,WANG Ping,et al.Experiment on slotted tube blasting of axial decoupling coefficient charging[J].Explosion and Shock Waves,2017,37(1):134-139.(in Chinese)
• [16]严鸿海，张义平，任少峰，等．孔底准真空间隔装药的爆破效果试验研究[J]．爆破，2018,35(1):66-74．[16]YAN Hong-hai,ZHANG Yi-ping,REN Shao-feng,et al.Experimental study on blasting effect of quasi vacuumdecking in hole bottom[J].Blasting,2018,35 (1):66-74.(in Chinese)
• [17]KUMAR V H,K A M,P M R,et al.Influence of joint orientation and spacing on induced rock mass damage due to blasting in limestone mines[J].Mining,Metallurgy&Exploration,2023,40(6):2349-2359．
• [18]WANG Zhi-liang,HUANG You-peng,XIONG Feng.Three-dimensional numerical analysis of blast-induced damage characteristics of the intact and jointed rock mass[J].Computers,Materials&Continua,2019,60(3):1189-1206．
• [19]JAYASINGHE L,SHANG J,ZHAO Z,et al.Numerical investigation into the blasting-induced damage characteristics of rocks considering the role of in-situ stresses and discontinuity persistence[J].Computers and Geotechnics,2019,116:103207-103207．
• [20]叶海旺，韦文蓬，周汉红，等．裂隙岩体精细化数值模型构建与爆破模拟[J]．爆破，2023,40(4):44-51．[20]YE Hai-wang,WEI Wen-peng,ZHOU Han-hong,et al.Refined numerical model construction and blasting simulation of fractured rock mass[J].Blasting,2023,40(4):44-51.(in Chinese)
• [21]叶海旺，彭瑞，田治平，等．基于孔间延时优化的骨料矿山台阶爆破大块率控制[J/OL]．金属矿山:1-10.[2025-08-14].https:∥link.cnki.net/urlid/34.1055.td.20240812.1438.004．[21]YE Hai-wang,PENG Rui,TIAN Zhi-ping,et al.Large lump rate control of aggregate mine bench blasting based on inter-hole delay optimization[J/OL].Metal Mine:1-10.[2025-08-14].https:∥link.cnki.net/urlid/34.1055.td.20240812.1438.004.(in Chinese)
• [22]叶海旺，杨坤，马宝臣，等．基于排间延时的柱状节理岩体爆破块度优化研究[J]．工程爆破，2024,30(6):1-8．[22]YE Hai-wang,YANG Kun,MA Bao-chen,et al.Columnar jointed rock blasting fragmentation optimization based on changing inter-row delay time[J].Engineering Blasting,2024,30(6):1-8.(in Chinese)
• [23]林继凯，孙梦迪，刘增辉，等．中部空气间隔不同比例装药对炮孔孔壁受力及碎石块度的影响[J]．爆破器材，2023,52(6):55-64．[23]LIN Ji-kai,SUN Meng-di,LIU Zeng-hui,et al.Influence of charge with different proportions under the condition of middle air separation on the stress on the borehole wall and the rock fragmentation[J].Explosive Materials,2023,52(6):55-64.(in Chinese)