混装乳化炸药不同孔径水孔装药试验研究

Experimental Study on Charging of Water Loaded Borehole in Field Mixed Emulsion Explosives under Different boreholes

针对不同孔径下混装炸药车水孔装药,对炸药与孔内积水的混合情况进行了试验研究。通过混装乳化炸药在140 mm、200 mm、250 mm不同炮孔直径下的入水混合过程开展了相似试验研究,并结合现场工况进行了数值仿真模拟,得到不同时间下炸药入水混合过程和乳化炸药在炮孔轴心线上的速度流场和曲线图。结果表明:在孔内水位为1. 0 m、装药速度为1. 2 m/s的条件下,140 mm炮孔直径在装药过程中药柱容易被水切断形成断层,炸药无法达到孔底,随着炮孔直径的增大,炮孔内部炸药与水混合越充分,水面整体上升而对炮孔内炸药性能影响减小,炸药射流(最大/最小)有效射程分别为0. 62 m/0. 3 m、> 1 m/0. 4 m、> 1 m/0. 45 m。

The mixing of explosive and accumulated water in different holes was experimentally studied for the water hole charge of mixing explosive truck.Similar experiments were carried out to study the mixing process of mixed emulsion explosive under different borehole diameters of 140mm,200mm and 250mm.Meanwhile,according to the field conditions,the velocity field and axial velocity curve of the mixing process for mixed emulsion explosive under different timeswere obtained by numerical simulation.The results show that under the condition of 1.0m water level and 1.2m/s charge velocity,the charge with 140mm borehole diameter is easy to be cut off by water to form a fault,which makes the explosive not to be reached to the bottom of the borehole.With the increase of borehole diameter,the more fully the mixture of explosive and water in the borehole,the more effect of the performance of the explosive is performed in the borehole by the overall rise of water surface.The effective ranges of explosive jet(maximum/minimum)are 0.62m/0.3m,>1m/0.4m,>1m/0.45m,respectively.