爆破2025，Vol.42Issue(3)：37-45,9.DOI:10.3963/j.issn.1001-487X.2025.03.005
基于时序控制断裂爆破的多孔模型试验研究
Experimental Study on Porous Model based on Time-sequenced Controlled Fracture Blasting
摘要
Abstract
In recent years,the technology of controlled fracture blasting with sequential timing has been exten-sively utilized in the construction of mining engineering projects and hydraulic infrastructures.To investigate its influ-ence on crack propagation mechanisms in rock masses,C50-grade concrete specimens with 3,5,and 9 boreholes were cast.Detonators were used instead of explosives to conduct multi-hole blasting tests on rock-like models,examining the propagation paths of cracks and the effects of fracture formation.The LS-DYNA software was used to simulate blasting processes under various working conditions,utilizing the RHT constitutive model to characterize the dynamic failure behavior of rock.A fluid-solid coupling algorithm was employed to simulate the interaction between explosive stress waves and rock masses.By regulating variables such as borehole spacing and detonation timing,several numeri-cal models were developed.Post-processing software was used to extract the simulation results,which were subse-quently compared with experimental data to investigate crack propagation patterns within rock masses.The results in-dicated that time-sequenced controlled blasting technology effectively guides cracks to propagate along predetermined paths.Both the detonation timing sequence and borehole spacing significantly influence crack formation,with more pronounced effects observed in configurations containing a greater number of boreholes.Rational design of initiation timing and borehole spacing can substantially enhance the efficiency of explosive energy utilization while reducing damage to the surrounding rock.This study provides theoretical foundations and technical support for precision blas-ting operations in complex geological conditions.关键词
时序控制断裂爆破/多孔模型/数值模拟/裂纹扩展Key words
time-sequence controlled fracture blasting/multi-hole model/numerical simulation/crack propa-gation分类
矿业与冶金引用本文复制引用
唐明酉,祝云峰,吴松,王远宏,黄俊红,李新平..基于时序控制断裂爆破的多孔模型试验研究[J].爆破,2025,42(3):37-45,9.基金项目
国家自然科学基金资助项目(52109165) Supported by the National Natural Science Foundation of China(Grant No.52109165) （52109165）
