大断面一次成巷爆破数值模拟及试验研究  

Numerical simulation and experimental study on blasting of large cross-sectional lane

作　　者：马东 尤元元 胡世超 宫国慧 高常胜 李宗武 吴东海 左进京 MA Dong;YOU Yuan-yuan;HU Shi-chao;GONG Guo-hui;GAO Chang-sheng;LI Zong-wu;WU Dong-hai;ZUO Jin-jing(Ansteel Group Mining Gongchangling Corporation Limited,Anshan 114046,Liaoning,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]鞍钢集团矿业弓长岭有限公司,辽宁鞍山114046 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]北京科技大学土木与资源工程学院,北京100083

出　　处：《工程爆破》2024年第2期66-72,共7页Engineering Blasting

摘　　要：为有效解决大断面掘进爆破作业中存在的技术难题,在大断面巷道中采用孔间多时序一次成巷爆破技术。利用LS-DYNA有限元数值模拟软件,通过改变大断面巷道炮孔掏槽方式、孔间起爆时差,进行数值模拟计算。在此基础上确定了掏槽方式、炮孔布置方式等关键爆破技术参数,并进行了现场试验及应用。结果表明:与分步开挖相比,采用孔间多时序全断面一次掘进成巷爆破技术后,巷道成型效果好、炮孔利用率提高18%。改进后的爆破方案有效地解决了大断面分步开挖中面临的问题,对地下矿大断面掘进爆破巷道成型及控制具有一定的参考价值。In order to effectively solve the technical problems in large section excavation and blasting operations,the inter-hole multi-timing blasting technology is used in large section roadways.Using LS-DYNA finite element numerical simulation software,numerical simulation calculations are conducted,where in the cut method of large cross-section tunnel boreholes and the delay time difference of blasting between boreholes are varied.On this basis,the key blasting technical parameters such as hollowing method and blasthole arrangement were determined and tested and applied.The results of the field test showed that compared with step-by-step excavation,the use of inter-hole multi-temporal full-section tunneling technology resulted in good channel formation and an 18%increase in the utilization rate of blastholes.The improved blasting scheme effectively solves the problems faced in the step-by-step excavation of large cross-sections,and is of great significance to the shaping and control of blasting channels for large cross-sectional excavations in underground mines.

关 键 词：弓长岭铁矿 大断面 一次成巷 孔间多时序 炮孔利用率 数值模拟 

分 类 号：TU443[建筑科学—岩土工程] TD235[建筑科学—土工工程]