A Study on the Development of Rapidly Hardening Grouting Method for the Effective Filling in the Underground Cavity

지하공동의 효율적 충전을 위한 급결 충전 그라우트공법개발에 관한 연구

  • 김수로 (한국광해관리공단 광해기술연구소) ;
  • 김태혁 (한국광해관리공단 광해기술연구소) ;
  • 신동춘 (벽산엔지니어링 지반사업부) ;
  • 권현호 (한국광해관리공단 광해기술연구소)
  • Published : 2009.12.31

Abstract

The collapse of the underground cavity can cause the abrupt local subsidence of the ground surface. It can be hazardous to the stability of road and building for human activity. Therefore it is necessary to develop reinforcement methods for the filling of the underground cavity. This study was executed to improve the material quality and systems to fill the calcium-aluminate mineral $(C_{12}A_7)$ environmentally, and minimize the loss of filling materials for the steep underground cavity. Filling material which was developed in this study is composed of rapid hardening material and additives. The developed material had rapid hardening and non-separation ability in the water cavity condition, so it made the effective underground dam in the cavity with prevention of material loss when it was poured in the water cavity. Results of heavy metal leaching test for environmental assessment showed that it was environmentally suiTable material for the filling in the mine cavity.

Keywords

Subsidence;Abandoned Mine;Underground cavity;calcium-aluminate mineral;heavy metal leaching test

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