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The major causes of flyrock are inadequate burden, inadequate stemming length, drilling inaccuracy, excessive powder factor,unfavorable geological conditions
open joints, weak seams and cavities
, inappropriate delay timing and sequence, inaccuracy of delays, back break and loose rock on top of the bench
expl.
飞石产生的主要原因包括抵抗线不足、炮泥长度不够、钻孔不精确、单位炸药消耗量过多、地质条件不利
露天节理、矿层不稳固和空穴
、延时定时和序列不当、延时不精确、发生反向爆破、以及台阶上部岩石松散等
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