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Influence of millisecond time, charge length and detonation velocity on blasting vibrationCHEN Shi-hai(陈士海)1, 2, 3, WU Jian(吴建)1, ZHANG Zi-hua(张子华)1(1. College of Civil Engineering, Huaqiao... the influencing factors in the blasting process. The effects of millisecond time, charge length and detonation velocity on the blasting vibration are discussed by analyzing the characteristics......
Preliminary Dynamic Study on Millisecond Blasting卓刚,毕谦,胡廷炜,黄呈伟摘 要:<正> This paper presents a preliminary dynamic photoelastic investigation on millisecond blasting. Millisecond blastings with different delay time and the simultaneous blasting of two charged holes are simulated to discuss the mechanism of millisecond blasting and the comparisons......
Trans. Nonferrous Met. Soc. China 26(2016) 1965-1974 Application of Hilbert-Huang transform based delay time identification in optimization of short millisecond blasting Xiu-zhi SHI, Xian-yang QIU... blasting project, the capability of the EMD (empirical mode decomposition) method in identifying the delay time of short millisecond blasting with precise initiation was compared with the instantaneous......
要:<正> Time interval of short delay ignition is an important factor to affect the efficiency of blasting cuts. The motion process of rock pieces... to the borehole depth. The suggested results are of practical value to the optimal design of the delay interval in millisecond blasting related to the parallel hole cuts with an empty hole.关键词:......
technologies including high bench blasting, inclined hole, millisecond blasting, pre-splitting blasting and casting blast parameters determination which have influence on the effect of casting blast have been...Analysis of key technologies and development of integrated digital processing system for cast blasting designDING Xiao-hua(丁小华)1, 2, LI Ke-min(李克民)1, 2, XIAO Shuang-shuang(肖双双)1, 2, HU Wei-min(狐为民)3......
中深孔凿岩逐孔爆破技术在那林金矿的试验研究郭明春1,胡宪铭2(1.吉林省长春市长春黄金研究院2.中国黄金集团投资有限公司)摘 要:中国岩金地下开采矿山逐孔起爆技术应用不多.详述了逐孔起爆微差时间间隔和起爆网络的选择及设计,介绍了那林金矿逐孔微差爆破工程试验与实践.试验研究结果表明,中深孔逐孔爆破技术能够有效地降低爆破震动,改善爆破效果和提高爆破的安全性.关键词:中深孔凿岩； 微差爆破； 逐孔起爆； 那林金矿......
中深孔微差挤压爆破法回采顶柱的实践王群1(1.广东省肇庆市高要市广东高要河台金矿)摘 要:针对河台金矿云西矿区顶柱开采技术条件,选择了中深孔爆破法回采方案.详述了中深孔爆破参数和爆破工艺.多排同段大药量微差挤压爆破技术的应用,有效地降低了顶柱回采生产成本,提高了生产能力,取得了较好的技术经济效果.关键词:顶柱回采； 中深孔； 微差挤压； 爆破参数......
铜坑矿中深孔凿岩爆破参数优化试验研究吴贤振1,余敏1,吴强2(1.江西省赣州市江西理工大学2.广西华锡集团股份有限公司铜坑矿)摘 要:为优化铜坑矿92#矿体凿岩爆破参数,进行了单孔爆破漏斗试验,孔网参数以及微差间隔时间对比试验.经过综合分析,最终推荐铜坑矿65 mm扇形中深孔凿岩爆破参数为:炸药单耗1.168 kg/m3,最小抵抗线1.2 m,孔底距1.5 m,微差间隔时间50 ms.关键词:扇形中深孔； 爆破漏斗； 微差间隔时间； 孔网参数......
关系 Fig. 3 Relationship between test block velocity and blasting center distance 试块波速与龄期关系如图4所示.从图4可以看出:不同混凝土试块所受的超声波波速随着龄期的增加共经历了3个阶段,分别为缓慢增长阶段,迅速增长阶段和基本稳定阶段.以强度为C40的试块为例,龄期为6~12 h阶段,波速由3.151 km/s增长到... criteria of blasting vibration in hydropower engineering and several key problems in their application[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(8): 1513-1520. [4] 徐林生. 大断面高速公路隧道复合式衬砌结构......
. LING and LI [15] determined the actual delay time of millisecond blasting with this method. Regarding one blast as a system, blast of every detonator is a process of energy input and will inevitably...: Academic Press Incorporated, 1992: 49-176. [15] LING Tong-hua, LI Xi-bing. Time-energy analysis based on wavelet transform for identifying real delay time in millisecond blasting [J]. Journal of Rock......
