首页> 外文会议>Eco-Materials Processing and Design VIII; Materials Science Forum; vols.544-545 >Recycling of Waste Rock as a Filler to Prevent Ground Subsidence
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Recycling of Waste Rock as a Filler to Prevent Ground Subsidence

机译:回收废石料以防止地面沉降

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In this study, we investigate to use waste rock as a filler for filling the cavity of abandoned mines. We discuss that waste rock can be used as a filler in the side of environmental and structural stability. Waste rocks from four mines, such as Samgi, second Yeonwha, Dongwon and Dogye, are used. Leaching tests are conducted to check the environmental stability by four methods of Soil Leaching Test, MALT, TCLP and KSLT. According to the results, Cu, Cd, Cr and As were not detected and other metals leached below 0.5 ppm. Compressive strength of waste rock and crushed waste rock are measured to evaluate the structural stability. Mixtures of crushed waste rock are used to evaluate the possibility of enhancing compressive strength. Mixture 1 is composed of 11.1% of above 13.2mm, 22.2% of 9.5-13.2mm, 33.3% of 6.7-9.5mm, 22.2% of 3.5-6.7mm and 11.1% of 2.0-3.5mm. And mixture 2 is composed of 50% of above 13.2mm and 50% of 9.5-13.2mm. Compressive of the latter was more than that of the former. Waste rock can be probably used as a filler, considering the compressive strength of commercialized filler, or 40 Kg/cm~2.
机译:在这项研究中,我们研究使用废石作为填充物来填充废弃矿井的空腔。我们讨论了在环境和结构稳定性方面可以将waste石用作填料。使用了来自四个矿山的废石,例如三木,第二延华,东原和山狗。通过土壤浸出测试,MALT,TCLP和KSLT四种方法进行浸出测试以检查环境稳定性。根据结果​​,未检测到Cu,Cd,Cr和As,其他金属的浸出低于0.5 ppm。测量废石和碎石的抗压强度,以评估其结构稳定性。碎石的混合物用于评估提高抗压强度的可能性。混合物1由高于13.2mm的11.1%,9.5-13.2mm的22.2%,6.7-9.5mm的33.3%,3.5-6.7mm的22.2%和2.0-3.5mm的11.1%组成。并且混合物2由50%以上的13.2mm和50%的9.5-13.2mm组成。后者的压缩比前者更大。考虑到商业化填料的抗压强度,即40 Kg / cm〜2,石可以用作填料。

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