| Seepage-damage coupling study of the stability of water-filled dump slope | |
Lv XF(吕祥锋) ; Wang ZW(王振伟); Wang, JG; Lv, XF (reprint author), Chinese Acad Sci, Inst Mech, 15 North Fourth Ring Rd, Beijing 100190, Peoples R China.
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| Source Publication | ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS (IF:2.243[JCR-2018],2.193[5-Year]) |
| 2014-05 | |
| Volume | 42Pages:77-83 |
| ISSN | 0955-7997 |
| Abstract | The stability of water-filled dump slope has been one significant geotechnical engineering problem that needs to be urgently resolved. The coupling effects of seepage and damage on the dump slope are critically important for stability analysis. In this paper, a seepage-damage coupled mathematical model is developed for fractured coal rock mass, and the permeability tensor effects from the fracture damage of coal rock mass are investigated. Numerical simulations are conducted for Dongming and Heidaigou dump slope on the stability of water-filled dump slope under the coupling effects of seepage and damage. Numerical results show that the high pore pressure can reduce the positive pressure of the sliding surface and the friction, and can lead to the strength loss of water-filled coal rock mass. It is also demonstrated that with the propagation of the slope crack, the pore pressure gradually dissipate to larger areas, and approaches the slope table. This will result in the further damage of the table rock of slope and the decrease of support force, has a serious impact on the overall slope stability of the system. With the development of seepage, the opened cracks increase gradually. The water pressure not only has restructured the fracture network of coal rock, but also has a huge impact on the main fracture deformation. It is demonstrated that if pore water pressure is difficult to dissipate, effective stress decreases and weak surface increases, and this further leads to instability of coal rock slope. The results also reveal that it is easy to cut out at the foot of the slope. Two failure models of "arc" or "located-sliding" are observed. The numerical results further reveal the percolation mechanism of the softening of coal rock slope. (C) 2013 Elsevier Ltd. All rights reserved. |
| Keyword | Seepage-damage Coupled Model Water-filled Coal Rock Slope Cracks Pore Pressure Dissipate Numerical Calculation |
| Subject Area | Engineering ; Mathematics |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000336477600011 |
| Funding Organization | This work was financially supported by National Natural Science Foundation No. 51274122, No. 50774046 and China Coal Research Institute Youth Innovation Fund No. 2006QN07. |
| Department | LMFS工程地质体力学(LEM) |
| Classification | 二类/Q1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/48883 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Lv, XF (reprint author), Chinese Acad Sci, Inst Mech, 15 North Fourth Ring Rd, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Lv XF,Wang ZW,Wang, JG,et al. Seepage-damage coupling study of the stability of water-filled dump slope[J]. ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,2014,42:77-83. |
| APA | 吕祥锋,王振伟,Wang, JG,&Lv, XF .(2014).Seepage-damage coupling study of the stability of water-filled dump slope.ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS,42,77-83. |
| MLA | 吕祥锋,et al."Seepage-damage coupling study of the stability of water-filled dump slope".ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS 42(2014):77-83. |
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