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飞散到爆破安全区以外的过远飞石所引起的事故,约占露天矿爆破事故的25％。也是毁坏矿山设备和设施的常见原因。炸药能量超过爆层所需能量、填塞不当或爆炸能经岩层弱化带迅速泄出都会产生飞石。发生这种现象时,大部分炸药能量都消耗于抛掷岩石,而不是用于破碎岩石和控制爆层的移动。地质因素、不当的爆破设汁或工作粗心大意都可能引起飞石。矿山必须掌握在易于产生飞石的地质条件下爆破时如何改变爆破方法。也必须要评价如何会影响产生飞石的其它因索,如单位炸药消耗量、炮孔排列方式、延期顺序、填塞高度、炮孔精度和装药方法等。
The accident caused by flying too far flying stone beyond the blasting safety zone accounts for about 25% of the blast accident in the open pit mine. It is also a common cause of destruction of mining equipment and facilities. Explosive energy exceeds the energy required for blasting, improper packing or explosion can be rapidly discharged through the rock weakening will produce flying stone. When this happens, most of the explosives energy is spent throwing rocks, not to break the rocks and to control the movement of the explosives. Geological factors, improper blasting design or carelessness may cause flying stone. Mines must master how to change the blasting method during blasting in geologic conditions that are apt to produce fly rock. It is also necessary to evaluate how other factors affecting the production of rock, such as unit explosives consumption, arrangement of blasting holes, delaying sequence, packing height, precision of blasting holes and charging methods, have to be evaluated.