Abstract: To optimize and control the over/under-excavation phenomena observed in the excavation of flat and super-large cross-section tunnels using the drill and blast method. A highway tunnel served as a case study, where numerical models for tunnel sections with grade Ⅲ and Ⅳ surrounding rock were established. The blasting process of the tunnel cross-section was replicated, and field-measured data were utilized to validate the numerical models. Analyses were performed on the variations in blast damage nephograms, blast profiles, maximum and average over/under-excavation distances, and over-excavation areas across different blasting schemes. These analyses quantified the impact of varying peripheral and cut hole spacings, as well as the charge quantities in blast holes, on the over/under-excavation during tunnel blasting. Subsequent to these analyses, the blasting schemes were optimized. By integrating numerical simulation outcomes with field-measured data, an optimal construction scheme was deduced that effectively minimizes over-excavation: the peripheral hole spacing was adjusted to 1 m for grade Ⅲ surrounding rock and to 0.8 m for grade Ⅳ.
田瑞端,莫冠旺,李响. 超大断面扁平结构隧道矿山法超欠挖优化控制研究[J]. 隧道与地下工程灾害防治, 2024, 6(2): 84-98.
TIAN Ruiduan, MO Guanwang, LI Xiang. Optimization on the over/under-excavation of flat and super-large cross-section tunnel with drill and blast method. Hazard Control in Tunnelling and Underground Engineering, 2024, 6(2): 84-98.
[1] 曲海锋. 扁平特大断面隧道修筑及研究概述[J]. 隧道建设, 2009, 29(2): 166-171. QU Haifeng. An overview on construction and research of super-large cross-section tunnels with low height-span ratios[J]. Tunnel Construction, 2009, 29(2): 166-171. [2] 彭波. 超大断面扁平结构隧道开挖方法数值模拟及优化研究[J]. 北方交通, 2021(10): 78-82. PENG Bo. Research on numerical simulation and optimization of excavation method for flat structure tunnel with super-large section[J]. Northern Communications, 2021(10): 78-82. [3] 王青松. 关于我国山岭隧道钻爆法施工技术发展的一些思考[J]. 隧道建设(中英文), 2023, 43(增刊1): 37-45. WANG Qingsong. Some thoughts on the development of construction technology of drilling and blasting method for mountain tunnels in China[J]. Tunnel Construction, 2023, 43(Suppl.1): 37-45. [4] 方俊波,刘洪震,翟进营. 山岭隧道爆破施工技术的发展与展望[J]. 隧道建设(中英文), 2021, 41(11): 1980-1991. FANG Junbo, LIU Hongzhen, ZHAI Jinying. Development and prospect of blasting technology for mountain-crossing tunnels[J]. Tunnel Construction, 2021, 41(11): 1980-1991. [5] 赵虎, 李笠. 超大断面隧道Ⅲ级围岩光面爆破质量控制[C] // 中国公路学会养护与管理分会. 中国公路学会养护与管理分会第八届学术年会论文集. 厦门:[出版者不详] , 2018: 206-211. [6] 王玉杰, 陈先锋, 彭天浩. 浅析岩石夹层对爆破效果的影响[J]. 岩石力学与工程学报, 2004, 23(8): 1385-1387. WANG Yujie, CHEN Xianfeng, PENG Tianhao. Analysis on influence of rock interlayer on blasting[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(8): 1385-1387. [7] 崔振华. 灰岩夹页岩地层隧道爆破技术优化[J]. 科学技术创新, 2023(12): 142-145. CUI Zhenhua. Optimization of tunnel blasting technology in limestone and shale strata[J]. Scientific and Technological Innovation, 2023(12): 142-145. [8] 吴姝蒙. 破碎型复杂岩体隧道爆破参数研究[D]. 沈阳: 沈阳工业大学, 2020. WU Shumeng. Research on blasting parameters of broken complex rock mass tunnel[D].Shenyang: Shenyang University of Technology, 2020. [9] 吴晓东. 超大断面分岔隧道安全爆破开挖技术研究[D]. 北京: 北京科技大学, 2022. WU Xiaodong. Research on controlled-blasting technology for safe excavation of super large cross-section branching-out tunnel[D]. Beijing: University of Science and Technology Beijing, 2022. [10] 陈国政, 孟陈祥, 万波, 等. 三台阶七步开挖法在超大断面扁平隧道的应用[J]. 价值工程, 2023, 42(32): 86-89. CHEN Guozheng, MENG Chenxiang, WAN Bo, et al. Application of three-step and seven-step excavation method in super-large section flat tunnel[J]. Value Engineering, 2023, 42(32): 86-89. [11] 杨波,赵军,周明聪,等. 隧道爆破掘进超欠挖原因分析及控制措施[J].化工矿物与加工, 2021, 50(1): 5-9. YANG Bo, ZHAO Jun, ZHOU Mingcong, et al. Analysis on the cause of insufficient excavation and control measures in tunnel blasting driving[J]. Industrial Minerals & Processing, 2021, 50(1): 5-9. [12] 赵泽昌, 张翼翔, 刘万林, 等. 中等砂化白云岩小断面隧洞控制爆破技术: 以滇中引水工程玉溪段隧洞为例[J]. 科学技术与工程, 2023, 23(29): 12663-12671. ZHAO Zechang, ZHANG Yixiang, LIU Wanlin, et al. Controlled blasting technology of small section tunnel in medium sanded dolomite: taking the Yuxi section tunnel of the Central Yunnan Water Diversion Project as an example[J]. Science Technology and Engineering, 2023, 23(29): 12663-12671. [13] 王勇洁. 隧道掘进爆破的超欠挖控制技术试验研究与应用[D]. 成都: 西南交通大学, 2022. WANG Yongjie. Experimental research and application of over-under-excavation control technology for tunnel driving and blasting[D]. Chengdu: Southwest Jiaotong University, 2022. [14] 阮迪新. 周边孔爆破参数对隧道超欠挖的影响及参数优化研究[D]. 重庆: 重庆大学, 2021. RUAN Dixin. Study on the influence of peripheral hole blasting parameters on over-excavation and under-excavation of tunnels and parameter optimization[D]. Chongqing: Chongqing University, 2021. [15] 李启月,魏新傲,郑静,等. Ⅳ级围岩大断面隧道全断面开挖轮廓控制研究与应用[J]. 公路交通科技, 2020, 37(3): 88-95. LI Qiyue, WEI Xin'ao, ZHENG Jing, et al. Study and application of profile control for full section excavation of large section tunnel in grade Ⅳ surrounding rock[J]. Journal of Highway and Transportation Research and Development, 2020, 37(3): 88-95. [16] 刘国强,刘彬,张庆明,等. 岩溶隧道光面爆破参数优化及其应用研究[J]. 隧道建设(中英文), 2021, 41(增刊2): 50-57. LIU Guoqiang, LIU Bin, ZHANG Qingming, et al. Parameter optimization of smooth blast in karst tunnel its application[J]. Tunnel Construction, 2021, 41(Suppl.2): 50-57. [17] 余绍山, 王薇, 李姚伟奇. 周边眼偏位空孔爆破设计优化研究与应用[J]. 铁道科学与工程学报, 2024, 21(4): 1509-1520. YU Shaoshan, WANG Wei, LI-YAO Weiqi. Research and application of offset hole for peripheral blasting design and optimization[J]. Journal of Railway Science and Engineering, 2024, 21(4): 1509-1520. [18] 雷明锋, 张运波, 秦桂芳, 等. 山岭隧道爆破效果神经网络评价模型及爆破参数优化决策方法研究[J]. 现代隧道技术, 2023, 60(2): 54-61. LEI Mingfeng, ZHANG Yunbo, QIN Guifang, et al. A study on neural network evaluation model of blasting effect in mountain tunnel and decision-making method for blasting parameter optimization[J]. Modern Tunnelling Technology, 2023, 60(2): 54-61. [19] 王平. 大断面隧道楔形掏槽爆破参数的优化[D]. 南宁: 广西大学, 2020. WANG Ping. Optimization of wedge cut blasting parameters for large section tunnel[D].Nanning: Guangxi University, 2020. [20] 中华人民共和国交通运输部. 公路隧道施工技术规范: JTG/T 3660—2020[S]. 北京: 人民交通出版社, 2020. [21] 赵高峰, 殷超凡, 扈晓冬, 等. 岩石隧道光面爆破的自动化布孔设计[J]. 隧道与地下工程灾害防治, 2020, 2(3): 48-57. ZHAO Gaofeng, YIN Chaofan, HU Xiaodong, et al. Automatic design of blast-hole pattern for smooth blasting of rock tunnel[J]. Hazard Control in Tunnelling and Underground Engineering, 2020, 2(3): 48-57. [22] 关振长, 周宇轩, 吕春波, 等. 空气间隔装药周边眼爆破精细化数值模拟[J]. 隧道与地下工程灾害防治, 2022, 4(4): 11-19. GUAN Zhenchang, ZHOU Yuxuan, LÜ Chunbo, et al. The refined numerical simulation for the periphery hole blasting with air-deck charge[J]. Hazard Control in Tunnelling and Underground Engineering, 2022, 4(4): 11-19.