Permeability and seepage stability of coal-reject and clay miz
This paper presents an experimental investigation into the permeability and seepage stability of the granular coal-reject mixed with clay, which is affected by clay content, axial pressure, and the use of geotextile. Laboratory seepage tests were performed to determine the coefficients of permeability under both Darcys and non-Darcys flow conditions. The critical hydraulic gradients of coal-reject with different percentages of clay, axial pressures and geotextile were also tested. The results indicate that the coefficients of permeability, k, and global permeability, K, decrease while the critical hydraulic gradient increases with increasing clay content and axial pressure. The permeability and the critical hydraulic gradient start their radical changes when the clay content exceeds 10% of the total dry weight of the sample. The placing of a layer of geotextile on the bottom of specimen can decrease the permeability and significantly improve the seepage stability of the coal-reject and clay mixture.
coal-reject non-Darcys flow permeability seepage stability
Sui Wang-hua Liu Jin-yuan Du Yong
School of Resources and Geosciences, China University of Mining & Technology, Xuzhou 221008, China Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, M5B2K3, Canad
国际会议
The 6th International Conference on Mining Science & Technology ICMST 2009(第六届国际矿业科学技术大会)
徐州
英文
1-7
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）