【摘要】 为解决某露天采场高陡边坡受生产爆破震动的影响,根据该采场的岩石性质和爆破规模,对采场进行了爆破振动测试,得出了该区域爆破地震波的传播特性,揭示了该矿区的爆破振动速度与药量和测点位置的关系,爆破振动速度随相对高程的增大而存在放大效应,放大系数的变化率随高程的增加而减小;通过控制段起爆最大药量,采用时差干扰降震技术较好地解决了生产规模与震动安全控制问题;现场试验表明,该矿的最佳段差时间为15 ms,平均降震率达到23.6%。更多还原

【Abstract】 To solve the problem of slope caused by blasting vibration damage at a certain iron mine,YBJ-1 blasting vibration seismometer and CD-1 velocity-meter were used to observe the velocity of particle caused by blasting according to the rock properties and the scale of blasting.The spreading law of blasting wave in the iron mine were acquired to propose an effective method of controlling the maximum blasting vibration velocity,which will keep slope close to blasting area safe from blasting vibration damage.The vibration velocity was proved to be relevant to explosive quantity and the location of testing spot.The magnifying effect of velocity along the height of slope was proved to decline with the relative height increasing.In terms of control of the maximum explosive quantity at the same time and the millisecond delay interval,blasting vibration has been reduced at the ratio of 23.6%. 15 ms delay interval was proved to be rational through the experiments in an open pit.更多还原