[1]陈泽屹①,王林峰①②,周龙①,等.水介质不耦合爆破载荷作用下隧道围岩的损伤范围计算方法及裂隙损伤分形研究[J].爆破器材,2025,54(05):47-56.[doi:10.3969/j.issn.1001-8352.2025.05.007]
　CHEN Zeyi,WANG Linfeng,ZHOU Long,et al.Calculation Method for Damage Range and Fractal Analysis of Crack Damage of the Tunnel Surrounding Rock under Water-Uncoupled Blasting Load[J].EXPLOSIVE MATERIALS,2025,54(05):47-56.[doi:10.3969/j.issn.1001-8352.2025.05.007]
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水介质不耦合爆破载荷作用下隧道围岩的损伤范围计算方法及裂隙损伤分形研究()

《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
54
期数:
2025年05
页码:
47-56
栏目:
爆破技术
出版日期:
2025-10-13

文章信息/Info

Title:
Calculation Method for Damage Range and Fractal Analysis of Crack Damage of the Tunnel Surrounding Rock under Water-Uncoupled Blasting Load
文章编号:
5981
作者:
陈泽屹①; 王林峰①②; 周龙①; 刘余①
①重庆交通大学山区公路水运交通地质减灾重庆市高校市级重点实验室（重庆，400074）
②三峡大学三峡库区地质灾害教育部重点实验室（湖北宜昌，443002）
Author(s):
CHEN Zeyi①;  WANG Linfeng①②;  ZHOU Long①;  LIU Yu①
① Key Laboratory of Mountainous Area Highway Transportation and Transportation Geological Disaster Reduction in University of Chongqing, Chongqing Jiaotong University (Chongqing, 400074)
② China Three Gorges University Key Laboratory of Geological Hazards in Three Gorges Reservoir Area, Ministry of Education (Hubei Yichang, 443002)
关键词:
水介质不耦合爆破; 不耦合系数; 分形维数; 围岩裂隙
Keywords:
water-uncoupled blasting;  uncoupling coefficient;  fractal dimension;  cracks in the surrounding rock
分类号:
TD235
DOI:
10.3969/j.issn.1001-8352.2025.05.007
文献标志码:
A
摘要:
为了研究水介质不耦合爆破载荷作用下隧道围岩的损伤裂隙范围，基于弹性波动理论、摩尔-库仑强度理论和断裂力学原理，在考虑环向应力的影响下，提出了粉碎区、裂隙I区、裂隙II区围岩损伤范围的计算方法。并通过LS-DYNA软件模拟，验证了水介质不耦合爆破载荷下单孔围岩的损伤范围计算公式的可靠性。结合分形维数理论，探究了不同不耦合系数情况下，砂岩在水介质条件下的单孔爆破损伤规律。结果表明：粉碎区半径为373 mm，位于模拟结果300～400 mm范围内；裂隙I区半径为490 mm，位于模拟结果470～500 mm范围内；裂隙II区半径为1 597 mm，略大于模拟结果。与已有计算方法相比，该计算方法精确性较高，误差控制在10%以内。随着水介质不耦合系数的增大，围岩在水介质不耦合装药条件下的损伤范围会逐渐减小，减小幅度为15%～ 90%，可以使岩壁得到有效保护。水介质面的增大会提高爆轰波作用于孔壁的冲击波峰值压力，提高炸药作用于围岩的能量，并使围岩破碎程度提升，产生较多的主裂纹与次生裂纹，破碎程度增长率分别为0.03%、0.10%、12.68%、44.00%。
Abstract:
In order to study the damage and fracture range of tunnel surrounding rock under water-uncoupled blasting load, based on elastic wave theory, Mohr-Coulomb strength theory, and fracture mechanics principles, a calculation method for the damage range of the surrounding rock in the crushed zone, fracture zone I, and fracture zone II was proposed, considering the influence of circumferential stress. Simulations were conducted using LS-DYNA software to verify the reliability of the calculation formula for the damage range of single hole surrounding rock under water-uncoupled blasting load. Combining fractal dimension theory, the damage law of single-hole blasting in sandstone under water medium conditions was explored under different uncoupling coefficients. The results indicate that the radius of the crushed zone is 373 mm, located within the range of 300-400 mm in the simulation results. The radius of fracture zone I is 490 mm, located within the range of 470-500 mm in the simulation results. The radius of fracture zone II is 1 597 mm, slightly larger than the simulation results. Compared with existing calculation methods, this method has higher accuracy and error control within 10%. As the uncoupling coefficient increases, the damage range of the the surrounding rock under the water-uncoupled charge conditions will gradually decrease by 15% to 90%,which can effectively protect the rock wall. The increase of the water medium surface will increase the peak pressure of the shock wave acting on the hole wall, enhance the energy of the explosive acting on the surrounding rock, and increase the degree of rock fragmentation, resulting in more primary and secondary cracks, with growth rates of 0.03%, 0.10%, 12.68%, and 44.00%, respectively.

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备注/Memo

备注/Memo:
收稿日期：2024-10-21
基金项目:国家自然科学基金联合基金（U22A20600）；重庆市研究生导师团队建设项目（JDDSTD2022009）；三峡库区地质灾害教育部重点实验室(三峡大学) 开放研究基金（2023KDZ07）
第一作者:陈泽屹（1999—），男，硕士研究生，主要从事岩土与地下工程领域的相关研究工作。E-mail: 993360471@qq.com
通信作者:王林峰（1983—），男，博士，教授，主要从事岩土与地下工程领域的相关研究及教学工作。E-mail: wanglinfeng@cqjtu.edu.cn
更新日期/Last Update: 2025-10-13