摘要
为优选适宜的微差延时间隔,指导生产爆破参数控制,采用仿真分析软件建立了二维和三维数值计算模型,研究了不同延时间隔对破岩量的影响规律,分析了延时间隔与破岩量和振动速度的关系,并开展了现场应用试验。研究表明:前后排起爆顺序不影响最佳延时间隔,但影响最终破岩量大小;随着延时间隔的增大,爆破破岩量呈现波动变化趋势,且延时10 ms时可以获得最大破岩量以及较大的振动速度;应综合考虑振动速度和破岩量两个指标,在建(构)筑物安全振动速度范围内,宜优先考虑爆破破岩量,以提高采场生产效率。现场应用后,爆破块度较为均匀,有效验证了优选参数的可行性和可靠性。
In order to optimize the appropriate delay interval and guide the control of production blasting parameters,the numerical simulation software was used to establish two-dimensional and three-dimensional numerical calculation models,and the influence of different delay intervals on the rock breaking amount was studied.The relationship between rock breaking amount and vibration velocity was studied,and field application tests were carried out.The study results showed that the blasting sequence of the front and rear rows of blast holes does not affect the optimal delay interval,but affects the final rock breaking amount.With the increase of the delay interval,the blasting rock volume shows a fluctuating trend,and when the delay time is 10 ms,the maximum rock breaking volume and larger vibration speed can be obtained.The two indicators of vibration speed and rock breaking volume should be comprehensively considered.Within the safe vibration speed range of buildings(structures),blasting rock volume should be given priority to improve production efficiency.After the field application,the blasting size is relatively uniform,which effectively verifies the feasibility and reliability of the optimal parameters.
作者
张西良
仪海豹
韩寒
李二宝
汪禹
杨海涛
周健
ZHANG Xiliang;YI Haibao;HAN Han;LI Erbao;WANG Yu;YANG Haitao;ZHOU Jian(State Key Laboratory of Safety and Health for Metal Mines,Maanshan 243000,China;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,China;Anhui Provincial Public Security Department,Hefei 230061,China;Huawei National Engineering Research Center of High Efficient Cyclic Utilization of Metallic Mineral Resources Co.,Ltd.,Maanshan 243000,China;School of Resources and Safety Engineering,Central South University,Changsha 410083,China)
出处
《金属矿山》
CAS
北大核心
2022年第7期73-79,共7页
Metal Mine
基金
“十三五”国家重点研发计划项目(编号:2017YFC0602902)。
关键词
延时间隔
爆破破岩量
振动速度
数值分析
现场试验
delay interval
blasting rock volume
vibration velocity
numerical analysis
field test
