爆破2026，Vol.43Issue(2)：71-81,129,12.DOI:10.3963/j.issn.1001-487X.2026.02.007
基于SPH-FEM的高瓦斯隧道掏槽孔延期时间优化
Optimization of Delay Time of Cutting Hole in High Gas Tunnel based on SPH-FEM Coupled Simulation
摘要
Abstract
Current initiation delay settings in high-gas tunnels typically follow fixed intervals(0 ms,25 ms,50 ms,75 ms,and 100 ms),yet the limited number of delay segments(fewer than the blast hole rows)forces auxilia-ry holes to share delays.This configuration,combined with inadequate cut-hole delay durations,significantly compro-mises optimal blasting outcomes.To address this issue,a field-programmable digital electronic detonator was imple-mented.Theoretical analysis determined the complete rock mass fracturing duration in the cutting area to be 40 ms,which was further validated through numerical simulation of rock mass displacement dynamics,establishing this as the optimal delay interval.The study reveals that rock mass displacement in the cutting area progresses through three distinct phases:fracture propagation,volumetric expansion,and rock material ejection.Based on the optimal cutting area delay time,the ideal initiation sequence for blast hole rows was established as 0 ms,40 ms,60 ms,80 ms,100 ms,and 120 ms,with subsequent field validation conducted in a high-altitude gas tunnel.Statistical analysis of blasting performance demonstrates that implementing the optimized delay sequence(0 ms,40 ms,60 ms,80 ms,100 ms,and 120 ms)achieves over 90％half-hole preservation and controls linear overbreak within 20 cm,satisfying construction specifications while validating the delay configuration's efficacy,with direct applicability to analogous tunnel blasting operations.关键词
高瓦斯隧道/延期时间/数值模拟/岩体运移情况/理论模型Key words
high gas tunnel/delay time/numerical simulation/migration of rock mass/theoretical model分类
矿业与冶金引用本文复制引用
孙永,姬中海,田成林,赵子龙,王杰,李中辉,王子龙..基于SPH-FEM的高瓦斯隧道掏槽孔延期时间优化[J].爆破,2026,43(2):71-81,129,12.基金项目
山东省博士后创新项目(SDCX-ZG-202400203) （SDCX-ZG-202400203）
青岛市博士后资助项目(QDBSH20230202074) （QDBSH20230202074）
煤矿灾害动力学与控制国家重点实验室开放基金资助项目(2011DA105287-FW202203) Supported by the Shandong postdoctoral innovation project(SDCX-ZG-202400203) （2011DA105287-FW202203）
Qingdao Postdoctoral Project(QDBSH20230202074) （QDBSH20230202074）
The State Key Laboratory of Coal Mine Disaster Dynamics and Control(No.2011DA105287-FW202203) （No.2011DA105287-FW202203）
