Dehydration of a Coal Mine Drainage Sludge for the Potential Landfill Cover

탈수 처리된 석탄 광산 슬러지의 복토재 재활용방안

  • Cui, Ming-Can (Determent of Civil Environmental and Architecture, Korea University) ;
  • Lim, Jung-Hyun (Determent of Civil Environmental and Architecture, Korea University) ;
  • Phyung, Yeaui (Determent of Civil Environmental and Architecture, Korea University) ;
  • Jang, Min (Mine Reclamation Corporation) ;
  • Shim, Yon-Sik (Mine Reclamation Corporation) ;
  • Khim, Jee-Hyeong (Determent of Civil Environmental and Architecture, Korea University)
  • 최명찬 (고려대학교 건축 사회공학과) ;
  • 임정현 (고려대학교 건축 사회공학과) ;
  • 예의평 (고려대학교 건축 사회공학과) ;
  • 장민 (한국광해방지 관리공단) ;
  • 심연식 (한국광해방지 관리공단) ;
  • 김지형 (고려대학교 건축 사회공학과)
  • Received : 2008.07.07
  • Accepted : 2008.09.18
  • Published : 2008.10.30

Abstract

A coal mine drainage sludge(designated as CMDS) is mainly generated during physicochemical treatment or electrical purification of the drainage abandoned mine that include dissolved heavy metal. To understand the possibility of an application of the dehydrated CMDS as the landfill cover medium of hygienic a reclaimed ground, an laboratory experiment was performed to investigate the physicochemical and geoengineering characteristics of the dehydrated CMDS. To improve the geoengineering characteristics of the dehydrated CMDS, the liquid limit, plasticity limit test, compaction method test, strength test, and hydraulic conductivity test ware performed with the lithification material mixed sludge. When the mixed ratio of the sludge and the lithification material was more than 1:06, the compaction method was A method, the moisture content less than 33.5%, the strength of mixed sludge was $8.2kg\;cm^{-2}$, the hydraulic conductivity was $2.7\times10^{-6}cm\;sec^{-1}$, the sludge was up to the landfill standard of US Environmental Protection Agency (US EPA).

Keywords

CMDS;Compaction method;Moisture content;Strength;Hydraulic conductivity

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