供风量对水下爆炸冲击波气泡帷幕消波效应的影响  

Influence of air supply rate on wave attenuation effect of bubble curtain for underwater explosion shock wave

作　　者：陆少锋 梁进 覃才勇 杜明燃 陈保健 LU Shao-feng;LIANG Jin;QIN Cai-yong;DU Ming-ran;CHEN Bao-jian(Guangxi New Harbour Engineering Co.,Ltd.,Fangchenggang 538001,Guangxi,China;School of Chemical Engineering in Anhui University of Science&Technology,Huainan 232001,Anhui,China)

机构地区：[1]广西新港湾工程有限公司,广西防城港538001 [2]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《工程爆破》2022年第5期143-148,共6页Engineering Blasting

基　　金：广西科技基地和人才专项基金资助项目(桂科AD20238084);防城港重点研发计划基金资助项目(防科AB21014001);广西重点研发计划基金资助项目(桂科AB22035001)。

摘　　要：为了减小水下爆破冲击波的危害,在某河道开展了气泡帷幕消减水下爆炸冲击波的现场试验。将300 g乳化炸药和2支PCB压力传感器同时悬吊在水面以下4.5 m深,乳化炸药位于中间,2支PCB传感器等距离位于两侧,且三者处于一条水平直线上,每支传感器与乳化炸药的水平距离为12 m。将气泡帷幕发生器置于其中1支传感器与炸药之间,与炸药水平距离为4 m。调节供风量产生相应的气泡帷幕,引爆炸药后测试两侧冲击波峰值压力,并计算有气泡帷幕一侧相比于无气泡帷幕一侧的冲击波压力下降幅度,对比分析了不同供风量形成的气泡帷幕对冲击波的消减效应。结果表明,供风量由0.938 m^(3)/min增加到7.5 m^(3)/min,冲击波峰压的消减幅度由77.507%增加到88.554%,供风量继续增加到29.1 m^(3)/min,冲击波峰压的消减幅度缓慢增加到90.102%。可见,气泡帷幕对水下冲击波的消波效果随着供风量的增加而增加,但综合考虑电能消耗和消波效果,在本试验条件下供风量7.5 m^(3)/min最为可取。In order to reduce the damage of underwater explosion shock wave,the field test of bubble curtain to reduce underwater explosion shock wave was carried out in the river.Suspend 300 g emulsion explosive and two PCB pressure sensors 4.5 m below the water surface at the same time.The emulsion explosive is in the middle,and two PCB sensors are equidistant on both sides,and the three are in a horizontal straight line.The horizontal distance between each sensor and the emulsion explosive is 12 m.The bubble curtain generator is placed between one of the sensors and the explosive,with a horizontal distance of 4m from the explosive.Adjust the air supply volume to produce the corresponding bubble curtain,test the peak pressure of the shock wave on both sides after detonating the explosive,calculate the drop range of the shock wave pressure on the side with bubble curtain compared with the side without bubble curtain,and compare and analyze the attenuation effect of the bubble curtain formed by different air supply volumes on the shock wave.The results show that when the air supply volume increases from 0.938 m^(3)/min to 7.5 m^(3)/min,the peak pressure of shock wave decreases from 77.507%to 88.554%,the air supply volume continues to increase to 29.1 m^(3)/min,and the peak pressure of shock wave slowly increases to 90.102%.It can be seen that the wave attenuation effect of bubble curtain on underwater shock wave increases with the increase of air supply,but considering the power consumption and wave attenuation effect,the air supply of 7.5 m^(3)/min is the best under this test condition.

关 键 词：爆炸力学 水下爆破 水中冲击波 气泡帷幕 消波效应 供风量 

分 类 号：TD235[矿业工程—矿井建设]