Barrier formation of micro-crack interface and piezoelectric effect in coal and rock masses
文献类型：期刊论文
| 作者 | Lv XF(吕祥锋); Pan YS; Xiao XC; Wang AW |
| 刊名 | INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
 |
| 出版日期 | 2013-12 |
| 卷号 | 64页码:1-5 |
| 通讯作者邮箱 | lvxiangfeng2006@126.com |
| 关键词 | Coal and rock mass Crack interface and tip Sliding friction Interface barrier Charge |
| ISSN号 | 1365-1609 |
| 产权排序 | [Lv, Xiangfeng] Beijing Municipal Engn Res Inst, Beijing 100037, Peoples R China; [Lv, Xiangfeng] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; [Pan, Yishan; Xiao, Xiaochun; Wang, Aiwen] Liaoning Tech Univ, Sch Mech & Engn, Fuxing 123000, Peoples R China |
| 通讯作者 | Lv, XF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| 合作状况 | 国内 |
| 中文摘要 | The interface barrier formation mechanism of micro-cracks of coal and rock mass is investigated by using theoretical analysis and piezoelectric experiments. It is found that the micro-cracks of coal or rock expand constantly under external loads, while the slip, dislocations and inhomogeneous deformation of crack interface and lattice cause charge breakthrough, and then, barrier form on the crystal interface. The generation process of charge is accompanied by the friction of micro-crack slip, and the dislocation and deformation are analyzed theoretically. A theoretical model of micro-crack slip friction charge is established. Furthermore, piezoelectric law of coal or rock deformation and fracture is studied experimentally. The results show that cracks expand vertically more seriously than horizontally, and vertical cracks expand first, followed by horizontal ones, which expand continuously till crashed at the end of the coal sample. Crack interface value of potential barrier increases constantly in the compression process of coal sample. And before the coal sample gets crashed, sliding friction between crack interfaces reaches the peak, together with the potential barrier. Moreover, extreme acceleration of transfer speed of charge is based on extreme multiplying potential value of crack interface. Both crack interface barrier and potential amplitude get change dramatically before the coal sample fracture, which will help to get the precursor information of coal sample rupture. More importantly, the monitoring results can predict the extent and state of coal and rock rupture. |
| 学科主题 | 岩体力学和土力学 |
| 收录类别 | SCI ; EI |
| 资助信息 | National Natural Science Foundation [11172121, 51004061]; National Basic Research Program of China [2010CB226803] |
| 原文出处 | http://dx.doi.org/10.1016/j.ijrmms.2013.08.003 |
| 语种 | 英语 |
| WOS记录号 | WOS:000326985900001 |
| 公开日期 | 2013-12-16 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/47577]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 推荐引用方式 GB/T 7714 | Lv XF,Pan YS,Xiao XC,et al. Barrier formation of micro-crack interface and piezoelectric effect in coal and rock masses[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2013,64:1-5. |
| APA | 吕祥锋,Pan YS,Xiao XC,&Wang AW.(2013).Barrier formation of micro-crack interface and piezoelectric effect in coal and rock masses.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,64,1-5. |
| MLA | 吕祥锋,et al."Barrier formation of micro-crack interface and piezoelectric effect in coal and rock masses".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 64(2013):1-5. |
入库方式： OAI收割
来源：力学研究所
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