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HE Songlin,YANG Renshu,DING Chenxi,et al. Numerical simulation and application of phased cut blasting in hard rock Roadway in metal mine[J]. Coal Science and Technology,2024,52(S1):37−46. DOI: 10.12438/cst.2023-0205
Citation: HE Songlin,YANG Renshu,DING Chenxi,et al. Numerical simulation and application of phased cut blasting in hard rock Roadway in metal mine[J]. Coal Science and Technology,2024,52(S1):37−46. DOI: 10.12438/cst.2023-0205

Numerical simulation and application of phased cut blasting in hard rock Roadway in metal mine

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Key Project of the National Natural Science Foundation of China (52204085)

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  • Received Date: February 23, 2023
  • Available Online: July 18, 2024
  • In response to the challenges of high rock strength in deep underground metal mines, difficulty in slotting, and low efficiency in excavation, based on the tunneling project at Xingshan Underground Iron Mine of Shougang Corporation, and utilizing precise per-hole blasting with digital electronic detonators, we propose a phased blasting scheme for slotting areas of straight-eye barrel-shaped grooves, combining segmentation within and between holes, as well as delays within each hole. In combination with numerical simulations and field tests, it presents a trench domain gradient detonation configuration with differential detonation in the hole area, between holes and within holes on the basis of the original conventional scheme, builds a three-dimensional(3D) model of the trench domain μsing LS-DYNA numerical simulation software, sets up the original conventional scheme and three gradient schemes for modelling, and provides a comparative analysis of the evolution of the effective peak stress in the dredged-trench zone for the original conventional blasting solution and the staged solution. The results of the numerical simulations show that the μse of short-delay inter-hole blasting can change the fluctuation pattern of the peak effective stress, and compared to the original conventional scheme, the peak effective stress state of the rock in the dredged-trench zone along the direction of the shell hole is increased by 40% to 57%, while the peak effective stress state of the rock in the radiμs of 0-30 cm at the bottom of the shell hole is increased by 84% to 92%. In addition to the numerical simulation results, field experiments were carried out to verify the results. It is clear that the combination of short-delay differential detonation between holes can improve debris crowding in mine excavation, and short-delay differential detonation within holes can improve throwing capacity, improve debris throwing after blasting in the upper part of the shell hole, and avoid affecting the blasting of subsequent shell holes. Incorporating the two in hard rock blasting can significantly improve the blasting effect and increase the hollowing progress by 28%. And better results can be obtained in rock point-excavation by μsing short delay between holes and long delay within hole settings. The results of this paper could provide a reference for similar mine production.

  • [1]
    何满潮,谢和平,彭苏萍,等. 深部开采岩体力学研究[J]. 岩石力学与工程学报,2005,24(16):2803−2813. doi: 10.3321/j.issn:1000-6915.2005.16.001

    HE Manchao,XIE Heping,PENG Suping,et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2803−2813. doi: 10.3321/j.issn:1000-6915.2005.16.001
    [2]
    谢和平. 深部岩体力学与开采理论研究进展[J]. 煤炭学报,2019,44(5):1283−1305.

    XIE Heping. Research review of the state key research development program of China:Deep rock mechanics and mining theory[J]. Journal of China Coal Society,2019,44(5):1283−1305.
    [3]
    李响,怀震,李夕兵,等. 基于裂纹扩展模型的深部硐室围岩致裂规律[J]. 煤炭学报,2019,44(5):1378−1390.

    LI Xiang,HUAI Zhen,LI Xibing,et al. Fracture patterns induced by deep underground excavation based on a crack propagation model[J]. Journal of China Coal Society,2019,44(5):1378−1390.
    [4]
    杨仁树. 我国煤矿岩巷安全高效掘进技术现状与展望[J]. 煤炭科学技术,2013,41(9):18−23.

    YANG Renshu. Present statusus and outlook on safety and high efficient heading technology of mine rock roadway in China[J]. Coal Science and Technology,2013,41(9):18−23.
    [5]
    YANG,Jianhua,WU Zenan,SUN Wenbin,et al. Numerical simulation on radiation and energy of blast-induced seismic waves in deep rock masses[J]. Journal of Central South University,2022,29(2):645−662. doi: 10.1007/s11771-022-4908-x
    [6]
    罗勇,宫凤强. 深部硬岩巷道围岩板裂破坏试验研究进展与展望[J]. 煤炭科学技术,2022,50(6):46−60.

    LUO Yong,GONG Fengqiang. Research progress and prospect of laboratory test of rock spalling in deep hard rock roadway[J]. Coal Science and Technology,2022,50(6):46−60
    [7]
    单仁亮, 马军平, 赵华, 等. 分层分段直眼掏槽在石灰岩井筒爆破中的应用研究[J]. 岩石力学与工程学报, 2003(4): 636−640. doi: 10.3321/j.issn:1000-6915.2003.04.026

    SHAN Renliang, MA Junping, ZHAO Hua, et al. Application of staged burn-cut in shaft blasting in limestone.[J]. Chinese Journal of Rock Mechanics and Engineering, 2003(4): 636−640. doi: 10.3321/j.issn:1000-6915.2003.04.026
    [8]
    杨国梁,姜琳琳,杨仁树. 复式楔形深孔掏槽爆破研究[J]. 中国矿业大学学报,2013,42(5):755−760.

    YANG Guoliang,JIANG Linlin,YANG Rernshu. Investigation of cut blasting with duplex wedge deep holes[J]. Journal of China University of Mining & Technology,2013,42(5):755−760.
    [9]
    宗琦,王从平. 深孔分段直眼掏槽试验研究[J]. 有色金属(矿山部分),2001(3):11−13. doi: 10.3969/j.issn.1671-4172.2001.03.004

    ZHONG Qi,WANG Congping. Experimental study on deep hole segmented straight hole cutting[J]. Nonferrousus Metals(Mining Section),2001(3):11−13. doi: 10.3969/j.issn.1671-4172.2001.03.004
    [10]
    高全臣,杨永琦,宋浩,等. 岩巷中深孔光爆最佳掏槽方式探讨[J]. 建井技术,1996(4):28−32.

    GAO Quanchen,YANG Yongqi,SONG Hao,et al. Discusussion on the best cutting way of light explosion in deep hole in rock roadway[J]. Mine Construction Technology,1996(4):28−32.
    [11]
    YANG Renshu,ZHENG Changda,YANG Liyun,et al. Study of two-step parallel cutting technology for deep-hole blasting in shaft excavation[J]. Shock and Vibration,2021(1):8815564.
    [12]
    倪昊. 竖井二氧化碳“二阶二段”筒形掏槽爆破技术及应用[J]. 煤炭科学技术,2023,51(10):65−71.

    NI Hao. Application and carbon dioxide two-step barrel cut blasting technology in coal mine shaft[J]. Coal Science and Technology,2023,51(10):65−71.
    [13]
    LENG Zhendong,SUN Jinshan,LU Wenbo,et al. Mechanism of the in-hole detonation wave interactions in dual initiation with electronic detonators in bench blasting operation[J]. Computers and Geotechnics 2021,129:103873
    [14]
    KATSABANIS P D,TAWADROUSΜS A,BRAUN C,et al. Timing effects on the fragmentation of small scale blocks of granodiorite[J]. Fragblast,2006,10(1-2):83−93. doi: 10.1080/13855140600858339
    [15]
    MA Jun,LI Xianglong,WANG Jiangguo,et al. Numerical simulation on selection of optimal delay time for precise delay blasting[J]. Shock and Vibration,2021,2021:4593221,9.
    [16]
    SAADATMAND H,KATSABANIS A P. The effect of stress wave interaction and delay timing on blast-induced rock damage and fragmentation[J]. Rock Mechanics and Rock Engineering,2020,53(5):2327−2346. doi: 10.1007/s00603-019-02043-9
    [17]
    CHEN Xudong,XU Lingyu,ZHU Qiao. Mechanical behavior and damage evolution for concrete subjected to multiple impact loading[J]. Ksce Journal of Civil Engineering. 2017,21(6):2351-2359.
    [18]
    MANUAL,K U S. LS-DYNA keyword user’s manual. LSTC Co.,Livermore,CA[Z] . 2007.
    [19]
    李志鹏,吴顺川,严琼,等. 瓦斯剧烈爆炸隧道衬砌损伤数值模拟与机理分析[J]. 煤炭学报,2018,43(S1):167−177.

    LI Zhipeng,WU Shunchuan,YAN Qiong,et al. Numerical simulation and mechanism analysis of tunnel lining structure damage subjected to severe gas explosion[J]. Journal of China Coal Society,2018,43(S1):167−177.
    [20]
    霍晓锋,史秀志,苟永刚. 边帮控制爆破裂纹扩展模拟及参数优化[J]. 爆破,2019,36(1):21−28. doi: 10.3963/j.issn.1001-487X.2019.01.004

    HUO Xiaofeng,SHI Xiuzhi,GOU Yonggang. Simulation of crack growth in sidewall controlled blasting and parameter optimization[J]. Blasting,2019,36(1):21−28. doi: 10.3963/j.issn.1001-487X.2019.01.004
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