矿产保护与利用2025，Vol.45Issue(4)：9-21,13.DOI:10.13779/j.cnki.issn1001-0076.2025.08.031
露井联采过渡阶段邻近巷道爆破振动响应与轴向不耦合装药多参数协同抑振技术研究
Blasting Vibration Response of Adjacent Roadways during the Transition of Combined Open-Pit and Underground Mining and Multi-parameter Coordinated Vibration Suppression Technology with Axial Decoupled Charge
摘要
Abstract
To address the technical challenge of blast-induced dynamic damage to the adjacent 1880 m-level sublevel drifts during the transition from open-pit to underground mining in the Luodang mining area of Liangshan Mining Co.,this study systematically investigated the dynamic disturbance mechanisms of surrounding rock masses under continuous column charges,axially decoupled charges,and radially decoupled charges.A comprehensive methodology integrating theoretical analysis,LS-DYNA numerical simulations,and field experiments was adopted.The results demonstrate that axially decoupled charges significantly reduce the dynamic response at critical positions of the drifts through the spatiotemporal interference effect of stress waves.The peak vertical particle velocity at the drift crown is reduced from 26.15 cm/s(with continuous column charges)to 14.50 cm/s,achieving a 44.6%reduction,which effectively satisfies the regulatory limits stipulated in the Blasting Safety Regulations.Numerical simulations further reveal that axially decoupled charges reconstruct the rock fragmentation mode via the superposition of multiple stress wave segments,resulting in a higher overlap ratio of the crushed zones compared to radially decoupled charges.Based on the threshold zoning control technique for blast epicenter distance(R≤20 m as the critical protection zone),a synergistic optimization scheme is proposed,employing a 4.0 m×4.0 m dense borehole pattern and 125 kg/hole axially decoupled charges.Under a constant specific charge of 0.65 kg/m3,field experiments validate that 81.28%of the blasted muck falls below 60 cm in size,with a boulder rate(>100 cm)of only 5.18%,and the vibration velocity in the drift is stably controlled below 15 cm/s.These findings provide both theoretical support and practical reference for the coordinated control of blast-induced vibrations and mining efficiency enhancement in open-pit to underground transition mining operations.关键词
露井联采/邻近巷道/轴向不耦合装药/爆破振动控制/动力损伤机制/大块率Key words
combined open-pit and underground mining/adjacent roadways/axial decoupled charging/blast vibration control/dynamic damage mechanism/oversize fragmentation ratio分类
矿业与冶金引用本文复制引用
吴金标,李祥龙,吴需,徐杰,刘路金,胡涛,张熙远..露井联采过渡阶段邻近巷道爆破振动响应与轴向不耦合装药多参数协同抑振技术研究[J].矿产保护与利用,2025,45(4):9-21,13.基金项目
国家自然科学基金面上项目(52274083) （52274083）
云南省教育厅高校服务重点产业科技项目(FWCY-BSPY2024053) （FWCY-BSPY2024053）
