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Safety of barricades in cemented paste-backfilled stopes
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-15 , DOI: 10.1007/s12613-020-2006-3
Xu Zhao , Andy Fourie , Ryan Veenstra , Chong-chong Qi

In underground mining, there has been an increasing use of “cemented paste” for the backfilling of stopes. As this cemented paste backfill (CPB) enters the stope as a fluid, shotcrete barricades are often used to retain the fill material during and after the filling operations. However, failures of barricades have been reported around the world in recent years. This paper presents an analytical solution based on the elastic thin plate theory for calibrating the design of shotcrete barricades in underground mines using CPB. This solution was used to determine the quantitative relationships between the lateral loading from the paste and the barricade response during the backfilling process. The results show that the proposed solution agrees well with in situ data. According to the actual barricade responses, the acceptable tensile stress and an analysis method of cracks development are proposed. The proposed solution has practical significance for underground mines.



中文翻译:

水泥浆回填采场中路障的安全性

在地下采矿中,越来越多地使用“水泥浆”来回填采场。由于这种水泥浆回填料(CPB)以流体形式进入采场,因此在灌浆操作期间和之后,经常使用喷射混凝土路障来保留灌浆材料。但是,近年来,世界各地都报道了路障的失败。本文提出了一种基于弹性薄板理论的解析解决方案,用于使用CPB校准地下矿井的喷射混凝土路障设计。该解决方案用于确定回填过程中糊状物的横向载荷与路障响应之间的定量关系。结果表明,所提出的解决方案与原位吻合良好数据。根据实际的路障响应,提出了可接受的拉应力和裂缝发展的分析方法。所提出的解决方案对地下矿山具有实际意义。

更新日期:2020-08-15
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