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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Threshold blasting: the renaissance of explosives in narrow reef mining
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Threshold blasting: the renaissance of explosives in narrow reef mining

机译：门槛爆破：狭窄礁石开采中炸药的复兴

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摘要

Threshold blasting involves the use of small amounts of high explosive to break and fragment hard rock without having to evacuate mining personnel. The method is easily assimilated and effective in rockbreaking, but requires rigid control on drilling, charging and timing. current underground trials are aimed at fine-tuning the amount of explosive energy and blast hole geometry to allow the firing of multiple sets of shot holes in a continuous manner. Through correct procedures, the after-blast fumes, dust and fly rock can be contained so as to provide a safe working environment.Threshold blasting hugely reduces the volumes of explosives used in mining and brings to maturity the potential of the process begun by Alfred Nobel when he introduced nitroglycerine, and later dynamite, to mining. Its key contribution is its enabling of continuous mining operations with well understood and relatively low cost technologies. The use of batch blasting, employing large burdens holds the greatest potential for delivering high flow rates of ore at minimal cost. There is good potential for rapid evolution of the concept.
机译：门槛爆破涉及使用少量高爆炸药来破碎和破碎坚硬的岩石，而不必疏散采矿人员。该方法易于同化并在破岩方面有效，但需要严格控制钻井，装料和时间安排。当前的地下试验旨在微调炸药的能量和爆破孔的几何形状，以允许连续发射多组发射孔。通过正确的程序，可以控制爆炸后的烟尘，粉尘和飞石，从而提供一个安全的工作环境。阈值爆破极大地减少了采矿中使用的炸药的数量，并使阿尔弗雷德·诺贝尔（Alfred Nobel）开始的工艺的潜力成熟当他将硝化甘油和后来的炸药引入采矿业时。它的主要贡献在于它能够使用众所周知的且成本相对较低的技术实现连续采矿作业。批量炸药的使用，负担沉重，具有以最小的成本输送高流速矿石的最大潜力。该概念具有快速发展的良好潜力。

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