【摘要】 在控制爆破中,为使炮孔周围产生的较密集的径向裂纹减少,使需要扩展的裂纹得到充分扩展,主要措施就是降低爆炸应力波作用,增加爆生气体的作用时间,即采取不耦合装药。本文从理论上分析装药不耦合系数Kd与爆破作用的关系,并在实验室和现场进行了部分试验,得出了不耦合系数为1.67时的爆破裂纹长度最长的结论。同时,随着不耦合系数的增加,裂纹数目也不断减少。更多还原

【Abstract】 In order to reduce dense radial cracks around charge and facilitate required crack in control blasting,the measures to be taken are to depress the function of blasting stress wave and increase acting time of explosion gas,i.e. to adopt decoupling charge. This paper analyses relationship between decoupling index Kd and blasting action. Based on both laboratory and in-situ experiments,it is concluded that furthest length of blasting crack occurs at Kd = 1.67 and number of cracks decreases with increase of decoupling index.更多还原