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露天矿边坡爆破产生的飞石对周围人机系统造成破坏,基于颗粒流理论研究了爆破后飞石的飞出距离。以海州矿某边坡为例,在边坡上设置了3种药量TNT的15个爆破点,对计算平衡后模型中颗粒飞出的散落情况进行了研究。结果表明,细观过程可分为3个阶段:爆炸冲击起主导作用的阶段、重力占优势的上覆岩层塌落阶段、颗粒下滑局部调整至平衡阶段。最大飞石距离小于450 m;A1到A15的飞石距离逐渐减小;1 kg TNT使岩石松动滑落,5 kg TNT飞石距离在250 m以内,10 kg TNT的飞石距离随爆破点的位置不同而不同。同时,飞石的距离与上覆岩层的完整性有很大关系。
The fly-stone produced by the blasting on the slope of open-pit mine caused damage to the surrounding man-machine system. Based on the particle flow theory, the fly-out distance of the flying stone after blasting was studied. Taking a slope of Haizhou Mine as an example, 15 blasting points of three kinds of TNT doses were set up on the slope, and the scattering situation of particles flying out after the equilibrium model was calculated. The results show that the mesoscopic process can be divided into three stages: the explosion impact plays a leading role in the stage, gravity dominated the overlying rock collapse stage, particle glide locally adjusted to the equilibrium stage. The distance between the rockets of A1 and A15 is gradually reduced; the rock is loosened and slipped by 1 kg of TNT; the distance between rock and stone of 5 kg of TNT is within 250 m; Different and different. At the same time, the distance between the fly-stone and the integrity of the overburden has a great relationship.