摘要
对炮孔耦合装药、空气不耦合装药、水不耦合装药等几种装药结构形式爆破时孔壁的透射压力进行了理论分析,结果表明:同等炸药和岩石条件下,耦合装药,爆轰波直接冲击孔壁,孔壁透射压力最大;水不耦合装药,爆轰波冲击压缩水介质激起水中冲击波,由水将爆炸压力传递给岩石,孔壁冲击压力降低;而空气不耦合装药,爆轰产物则膨胀充满炮孔后再作用于孔壁,孔壁压力最小。且随着装药不耦合系数值增大,孔壁压力降低,空气不耦合装药时孔壁压力下降速率更快。
A theoretical analysis was made on the transmitted pressure on the bore wall in explosions of different charge structures such as borehole coupling charge, air-decoupling charge and water-decoupling charge. Under the same conditions, for the coupling charge, the detonation wave directly shocks the bore wall so that the pressure is biggest. For the water-decoupling charge, the detonation wave shocks and compresses the water and arouses shock wave in the water, thereby the blasting pressure is transmitted to the rock by water. Therefore, the pressure on the bore wall lowers down. For the air-decoupling charge, however, the products of detonation first swell and fill the whole bore and then act on the bore wall, so that the pressure on the bore wall is the smallest among the three. With the increase of the coefficient of decoupling charge, the pressure on the bore wall decreases. The pressure on the bore wall decreases faster under the airdecoupling charge condition.
出处
《矿冶工程》
CAS
CSCD
北大核心
2006年第5期9-12,共4页
Mining and Metallurgical Engineering
关键词
装药结构
耦合装药
不耦合装药
孔壁压力
charge structure
coupling charge
decoupling charge
pressure on bore wall
