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分层深孔压碴爆破技术在原地爆破浸出中的应用
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摘要
在低品位铀矿开采中,原地爆破浸出是一种技术上可行的低成本开采方式。多年实践证明,爆破筑堆块度是直接影响浸出效果的主要因素之一。如何在特定环境及确保安全前提下,控制爆破筑堆块度、提高筑堆质量是原地爆破浸出工艺极为关键的问题。本文以铁路建设和露天开采的压碴爆破研究及实践为依据,结合赣南某铀矿井资源条件和生产实际情况,在原地爆破筑堆工艺中进行分层深孔压碴爆破应用探索试验。试验结果表明,这种方式可大大减少矿石大块率,提高筑堆质量和采场浸出效果。
Mining low grade uranium deposit by stope leaching method is technically feasible and low cost.The practice has proved that the stacking of blasting fragmentation is one of the main factors that directly affect leaching effect.Based on the specific environment and safety,controling blasting heap size,improving the quality of the heap of stope leaching process become extremely critical issue.Based on the study and practice of blasting railway construction and open-pit mining,combined with a uranium mine in Gannan resource conditions and the actual situation of production,application and exploration test of deep hole blasting in of heap construction technology,the results show that the bulk yield can be greatly reduced,quality and heap stope leaching effect can be improved.
引文
[1]陈信鸿,罗德丕,温远富.深孔压碴微差松动控制爆破技术及运用:贵阳市人民广场地下室27.6万m3石方爆破开挖[J].爆破,2000(S1):88-91.
    [2]解治宇.压碴爆破在铁路运输中的应用[J].中国矿业,2000(S1):175-176.
    [3]张生善,徐金汉.压碴爆破方法与经济效果[J].爆炸与冲击,1985,5(1):72-77.

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