脉冲水气射流的破岩实验研究  

Experimental Study on Rock Breaking by the Pulsed Water-Gas Jet

作　　者：唐川林[1] 朱伟林[1] 胡东[1] 

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2012年第2期34-37,共4页Journal of Hunan University of Technology

基　　金：科技部国际科技合作基金资助项目(2008DFA70300);湖南工业大学自然科学研究基金资助项目(2011HZX10)

摘　　要：利用脉冲水气射流喷嘴在振荡腔内引入空气,与自激脉冲射流掺混形成脉冲水气射流;当泵压为7.5 MPa时,进行了2组冲蚀实验,冲蚀抗压强度为6.9 MPa的混凝土,第一组实验分析了不同腔长对脉冲水气射流和脉冲射流冲蚀效果的影响,第二组实验分析了不同开孔孔径下脉冲水气射流的冲蚀效果。实验结果表明:泵压一定时,在合适的腔长下,脉冲水气射流比脉冲射流的破岩效果好,且存在一个最佳进气方式使脉冲水气射流的破碎体积最大。With pulsed water-gas jet nozzle the pulsed water-gas jet was formed by entraining and mixing the air in the self-oscillating pulsed jet. At the pump pressure of 7.5 MPa made two groups of erosion experiments on the compressive strength of 6.9 MPa concretes. For the first group analyzed and compared the erosion effects of the pulse water-gas jet and the pulse jet under different cavity lengths, and for the second group analyzed the erosion effects of the pulse water-gas jet under different pore diameters. The experimental results show that at certain pump pressure and under the suitable cavity length, the pulse water-air jet has better rock breaking effect than the pulse jet, and there is the best air injection means which reaches the peak value of the breaking volume for the pulse water-air let.

关 键 词：脉冲水气喷嘴 脉冲水气射流 冲蚀实验 

分 类 号：TD421.59[矿业工程—矿山机电]