Application of a non-linear viscoelastic-plastic rheological model of soft coal on borehole stability
文献类型：会议论文
| 作者 | Liu, Chun1; Zhou, Fubao2; Kang, Jianhong2; Xia, Tongqiang2,3 |
| 出版日期 | 2016 |
| 会议日期 | SEP 06-08, 2015 |
| 会议地点 | Wuhan, PEOPLES R CHINA |
| 关键词 | Nonlinear rheological model Creep property Borehole stability |
| 卷号 | 36 |
| DOI | 10.1016/j.jngse.2016.03.026 |
| 页码 | 1303-1311 |
| 英文摘要 | Time dependent deformation of coal has a significant effect on the stability of underground structures. In this study, taking the visco-elastic plastic characteristics and the damage effect into account, a non-linear model was proposed to describe the creep behavior of soft coal. Meanwhile, the creep equations of the proposed non-linear model were derived and the three-dimensional creep equations were constructed by generalizing the one-dimensional creep equations. At the same time, the uniaxial creep tests on soft coal specimens under different axial stress conditions were carried out to validate the proposedmodel. It is found that the present model can not only reproduce the transient creep under low axial stress level, but also can accurately predict the steady and accelerating creep stages under high axial stress level. Finally, borehole stability in soft coal seam was investigated based on the proposed model. The results show that the vertical displacement and plastic zone range around borehole gradually increase while the increasing rate decreases and tends to be stable after 20 days. It can also be obtained that the creep duration tends to be stable when it is about 20 days after drilling excavation under the simulation conditions. The analysis results should be useful for the long-term stability of boreholes in soft coal seam for gas extraction. (C) 2016 Elsevier B.V. All rights reserved. |
| 源文献作者 | Int Soc Rock Mech, Chinese Acad Sci, Inst Rock Soil Mech, Natl State Key Lab Geomechan & Geotechnical Engn |
| 会议录 | JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
 |
| 会议录出版者 | ELSEVIER SCI LTD |
| 会议录出版地 | OXFORD |
| 语种 | 英语 |
| WOS研究方向 | Energy & Fuels ; Engineering |
| WOS记录号 | WOS:000390830300019 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4915]  |
| 专题 | 岩土力学所知识全产出_会议论文 国家重点实验室知识产出_会议论文 |
| 作者单位 | 1.CUMT, IoT Percept Mine Res Ctr ; 2.CUMT, Fac Safety Engn ; 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn |
| 推荐引用方式 GB/T 7714 | Liu, Chun,Zhou, Fubao,Kang, Jianhong,et al. Application of a non-linear viscoelastic-plastic rheological model of soft coal on borehole stability[C]. 见:. Wuhan, PEOPLES R CHINA. SEP 06-08, 2015. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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