切缝药包空气间隔装药爆破的动态测试  

Dynamic test on silt-charge blasting of air-deck charge

作　　者：岳中文[1] 杨仁树[1,2] 陈岗[1] 潘长春[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]深部岩土力学与地下工程国家重点实验室,北京100083

出　　处：《煤炭学报》2011年第3期398-402,共5页Journal of China Coal Society

基　　金："十一五"国家科技支撑计划资助项目(2008BAB33B04)

摘　　要：为了研究不同装药结构的爆破效应,利用超动态应变测试系统,研究了水泥砂浆中切缝药包空气间隔装药爆破介质的动态响应。研究结果表明:采用空气间隔装药后,与连续装药相比,试件内同一位置应变峰值降低,空气柱起到了缓冲和储能的作用;切缝药包爆破中,切缝方向应变衰减速度较快,而随着距炮孔距离的增加在平行和垂直切缝方向的应变值则越来越接近;轴向不耦合系数在1.5～2.0之间爆破效果较好,间隔长度过大时,切缝方向和垂直切缝方向应变的比值有降低的趋势,影响定向爆破效果。研究结果为实际工程爆破提供了实验依据。In order to study explosive effect of different charge,dynamic response in cement mortar was researched under blasting of air-deck silt-charge using super-dynamic strain test system.The research results show that when air-deck charge is used,the peak strain in the same location within the specimen reduces compared with the continuous charge,and this presents that air column plays a cushion and the role of energy storage;the strain of slit direction weakens faster and the train of slit direction is closer to that of vertical slit direction with the increase of the distance from the hole under slot cartridge blasting;Axial-coupling coefficient between the blasting is better in the 1.5~2.0,and when interval length is too large,strain ratio of slit direction to vertical slit direction has a trend downward,so,directional blasting effect is influenced.The results provide the experimental basis for the actual blasting.

关 键 词：切缝药包 空气间隔装药 动态测试 动态响应 

分 类 号：TD235.44[矿业工程—矿井建设]