露天爆破运输平硐允许峰值质点振动速度的研究

Research on Allowable Peak Particle Vibration Velocity for Transport Adit in Blasting in Open-Pit Mine

通过现场爆破地震波的监测,结合爆破震动破坏判据,分析了平硐产生落块的原因,给出了平硐的允许峰值质点振动速度的建议值。平硐不同位置的最大允许振速因地质、几何形状和支护条件等因素的变化而有所不同,提出了允许振动速度在平硐的同一断面上的不同位置是不同的。爆破实践结果表明,该种提法是合理的。

Through the field monitoring of blasting seismic wave and using the blasting shock damage criterion, the causes for the block-dropping in the adit were analyzed and the allowable peak particle vibration velocity for the adit was given. The maximum allowable peak particle vibration velocity varies with the geology, geometrical shape and support conditions in the different positions of the adit, so it was put forward that the allowable vibration velocity varies at the different locations in the same section of the adit. The blasting practice results have shown that this statement is rational.