Stability effect of water content on dominant loess dumping areas

D. H. Zhang, N. Inoue, Akihiro Hamanaka, Takashi Sasaoka, Hideki Shimada, K. Matsui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The first large scale dominant loess dumping area in China, South external dumping area of Antaibao open pit coal mine occurred failure on October 29, 1991. The volume of sliding mass was approximately 11 Mm3. The loss is 6 person’s lives and a huge wealth. After 1987, many large-scale open pit coal mines were established. Six open pit mining areas have loess distribution of total nine open pit mining areas. Large-scale dominant loess dumping areas are formed and will be formed in China. More effort must be implemented to control stability risks of dominant loess dumping area. A field investigation was carried out in East open pit coal mine. It is including geological overview, hydrogeological conditions, water content of waste loess, floor conditions of external dumping area, and stable problem statements. A series of experiments are conducted. Test results show that the density of waste loess increases as the water content increases. The Young’s modulus and angle of internal friction of loess decrease as the water content increases from 15% to 25%. The cohesive strength of loess decreases dramatically as the water content increases from 15% to 25%. In the working face, the water content of loess should be as low as possible to decrease the transport costs. In roads of dominant loess dumping area, the water content of waste loess should be maintaining a suitable value to promote the quality of roads. In the dominant loess dumping area, the water content should be as low as possible under the conditions that meet environmental protection and land reclaiming.

Original languageEnglish
Title of host publicationLegislation, Technology and Practice of Mine Land Reclamation - Proceedings of the Beijing International Symposium Land Reclamation and Ecological Restoration, LRER 2014
EditorsZhenqi Hu
PublisherCRC Press/Balkema
Pages514-549
Number of pages36
ISBN (Electronic)9781138027244
Publication statusPublished - Jan 1 2015
EventInternational Symposium on Land Reclamation and Ecological Restoration, LRER 2014 - Beijing, China
Duration: Oct 16 2014Oct 19 2014

Publication series

NameLegislation, Technology and Practice of Mine Land Reclamation - Proceedings of the Beijing International Symposium Land Reclamation and Ecological Restoration, LRER 2014

Other

OtherInternational Symposium on Land Reclamation and Ecological Restoration, LRER 2014
CountryChina
CityBeijing
Period10/16/1410/19/14

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Environmental Engineering
  • Management, Monitoring, Policy and Law
  • Pollution

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