炮孔底部水介质在台阶爆破中的作用
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摘要
运用有限元软件ANSYS/LS-DYNA,对炮孔底部水间隔装药结构与正常装药结构做了对比数值模拟分析。结果表明:台阶炮孔底部的水垫层使得炮孔中的炸药爆炸时能量分布更加均匀,延长了应力波在岩体中的作用时间,更有利于破碎台阶的岩体。通过在现场进行具体应用实践,取得了良好的爆破效果,对进一步研究含水炮孔水压爆破和现场应用推广具有一定借鉴意义。
A comparative numerical simulation analysis was conducted via the software ANSYS/LS-DYNA on the charge structure between gun hole at the bottom of the water space and the normal blasting structure.The results showed that the water cushion at the bottom of the step blast holes makes explosive energy in blast holes a more even distribution,which lengthens the action of the stress wave in rock mass,and benefits to break the bench rocks.The specific application of the research finding above makes a good blasting effect and thus brings a reference for further study of the water pressure blasting theory and field applications.
A comparative numerical simulation analysis was conducted via the software ANSYS/LS-DYNA on the charge structure between gun hole at the bottom of the water space and the normal blasting structure.The results showed that the water cushion at the bottom of the step blast holes makes explosive energy in blast holes a more even distribution,which lengthens the action of the stress wave in rock mass,and benefits to break the bench rocks.The specific application of the research finding above makes a good blasting effect and thus brings a reference for further study of the water pressure blasting theory and field applications.
引文
[1]宋增春,刘钦,姜文成.炮孔底部垫层水介质爆破研究与应用[J].金属矿山,2000(7):11-13.
[2]林德余,马万昌,等.岩石爆破中水垫层作用的研究[J].岩石力学与工程学报,1992(2):130-139.
[3]陈世海.深孔水压爆破装药结构与应用研究[J].煤炭学报,2000,25(增刊):112-116.
[4]武海军,杨军,黄风雷,等.不同耦合装药下岩石的应力波传播特性[J].矿业研究与开发,2002,22(1):43-46.
[5]Sen G C,Ding Dexin.An investingation into the influence of quasi-static pressure on the mechanism of pressplitting rock[J].Explo-sives Engineering,1991(2):18-21.
[6]David Blythe.MSC/DYTRAN User's Manual[M].北京:TheMacNeal Schwendler Corporation,1991.
[7]屠同春.德兴铜矿爆堆铲装效率的研究[J].长沙矿山研究院季刊,1989,9(4):115-118.
[8]张建平.露天矿电铲铲装效率影响因素的分析[J].化工矿山技术,1995(8):22-27.
[2]林德余,马万昌,等.岩石爆破中水垫层作用的研究[J].岩石力学与工程学报,1992(2):130-139.
[3]陈世海.深孔水压爆破装药结构与应用研究[J].煤炭学报,2000,25(增刊):112-116.
[4]武海军,杨军,黄风雷,等.不同耦合装药下岩石的应力波传播特性[J].矿业研究与开发,2002,22(1):43-46.
[5]Sen G C,Ding Dexin.An investingation into the influence of quasi-static pressure on the mechanism of pressplitting rock[J].Explo-sives Engineering,1991(2):18-21.
[6]David Blythe.MSC/DYTRAN User's Manual[M].北京:TheMacNeal Schwendler Corporation,1991.
[7]屠同春.德兴铜矿爆堆铲装效率的研究[J].长沙矿山研究院季刊,1989,9(4):115-118.
[8]张建平.露天矿电铲铲装效率影响因素的分析[J].化工矿山技术,1995(8):22-27.