孔间不同毫秒延时对爆破振动影响的数值模拟  

Numerical simulation the effected of blasting vibration for different millisecond delay between the blast-hole

作　　者：李顺波[1] 杨军[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《煤炭学报》2013年第A02期325-330,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51074028)

摘　　要：合理的毫秒延时间隔可以有效地降低爆破振动,目前对精确延时毫秒间隔对爆破振动的影响还没有准确的研究成果。基于地震波传播过程中能量的变化和自由面的形成,给出了孔间毫秒延时时间的计算公式。并对不同毫秒延时间隔进行了数值模拟。结果表明:利用理论计算出的毫秒延时间隔时间的同时也要考虑自由面形成所需要的时间,从而达到理想的爆破效果。在模拟中所采用的爆破参数的情况下,孔间延时间隔为12 ms时利于降低爆破振动,同时满足自由面形成的时间,利于岩石的破碎。同时验证了计算公式的可行性。Abstract：The vibration can be reduced by reasonable millisecond delay interval, and there have not accurate results of precision millisecond delay time for blasting. Based on seismic wave propagation of energy in the process of change and free surface, the millisecond delay time formula was given. Numerical simulation of different millisecond delay time for blast-hole. The results show that using the theory to calculated the millisecond delay interval, at the same time, the for- mation of free surface time must be considered to achieve the desired blasting effect. Blasting parameters of the case used in the simulation for the blasting vibration can be reduced when the delay time is 12 ms, at the same time satisfies the free surface formation time, favorable for rock fragmentation. The results also show that the calculation formula is feasibility. Key words： millisecond interval ; blasting vibration ; precise delay ; rock fragmentation

关 键 词：毫秒间隔 爆破振动 精确延时 岩石破碎 

分 类 号：TD235[矿业工程—矿井建设]