分层深孔压渣爆破技术在原地爆破浸出中的应用探索  

Application and exploration of Layered deep hole pressing slag blasting technology in stope of in situ blasting leaching process

作　　者：张福星 闫鹏里 高学伟 钟有芳 彭道鹏 申金平 

机构地区：[1]中核赣州金瑞铀业有限公司,江西赣州341000

出　　处：《铀矿冶》2016年第1期1-5,共5页Uranium Mining and Metallurgy

摘　　要：在低品位铀矿床开采中,原地爆破浸出采铀是技术上可行的低成本开采方式。多年的实践证明,爆破筑堆块度是直接影响浸出效果的主要因素之一。如何在特定的环境及确保安全的前提下,控制爆破筑堆块度、提高筑堆质量成为原地爆破浸出工艺极为关键的技术。依据铁路建设和露天开采的压渣爆破研究及实践经验,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渣爆破的应用探索试验。结果表明,这项技术可大大减少矿石大块率、提高筑堆质量和采场浸出效果。In mining low grade uranium deposit, in situ blasting and heap leaching is technically feasi- ble with low cost. By many years practice demonstration, lumpiness of blasting and heap construction is one of main factors which influence of uranium leaching effect. How to under the specific environ- ment and ensure safety condition, controlling lump size of in situ blasting which are used in heap leac- hing and improving the quality of the heap become extremely critical issue in situ blasting and heap leaching process. Based on the study and practice of blasting in railway construction and open-pit min- ing, in combination with the resource conditions and the actual situation of production in one Gannan uranium mine, application and exploration of deep hole blasting test and stratification c f heap con- struction technology in stope was carried, the test results show that the bulk yield rate is greatly re- duced, quality and heap leaching effect in stope are greatly improved too.

关 键 词：分层深孔压渣爆破 原地爆破筑堆 大块率 

分 类 号：TD868[矿业工程—金属矿开采] TU751.9[矿业工程—矿山开采]