Experiment Study on Air-deck Divided Decoupling Charge In the Subway Construction
At present, smooth blasting are widely used in urban subway excavation.To improve smooth blasting effect in the blasting excavation process of urban subway, this paper took the fourteen section of Qingdao subway as the background, confirmed the reasonable interval of surrounding holes by combining the theoretical calculation and the actual scene; improved the smooth blasting effect obviously by changing the charge structure of periphery holes.The results of the experiment showed that adopted air-deck divided decoupling charge, when interval of surrounding holes was 350mm, and the minimum burden was 500mm, the smooth blasting effect was better, and the half eye tracking rate was beyond 85%, which meet the design requirements.The experiments proved that when adopted air-deck divided decoupling charge, the blasting effect was better than adopted concentrated charge, so there will be some reference value to the later engineering.
Smooth blasting Charge structure Blasting effect Urban subway
Ren-shu Yang Yu-long Che Qiang-Sun Shao-min Zhang Chuan-Huo
State Key Lab of GeoMechanics and Deep Underground Engineering,China University of Mining & Technolo School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing,100083,China
国际会议
上海
英文
1500-1503
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）