岩芯饼化机制及应力分析
采用数值模拟方法从不同地应力组合方式入手探究了地应力对岩芯饼化的影响.研究表明：当地应力超过一定值时,出现岩芯饼化现象,即高地应力才会引起岩芯饼化;当径向应力达到35 MPa时,岩芯开始出现饼化现象,径向应力是影响岩芯饼化的主要因素,而轴向应力仅使岩芯表面产生局部破坏;径向应力一定的情况下,随着轴向应力的增大,岩芯饼化逐渐减弱;岩芯饼化的形成过程以剪切破坏为主,并伴有少量的拉破坏;岩芯饼化现象的发生是一个复杂的力学过程....
Saved in:
| Published in | 东北大学学报（自然科学版） Vol. 37; no. 10; pp. 1491 - 1495 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
大连理工大学海岸和近海工程国家重点实验室，辽宁大连 116023
2016
大连理工大学岩石破裂与失稳研究所，辽宁大连 116024%东北大学资源与土木工程学院,辽宁沈阳,110819 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1005-3026 |
| DOI | 10.3969/j.issn.1005-3026.2016.10.026 |
Cover
| Summary: | 采用数值模拟方法从不同地应力组合方式入手探究了地应力对岩芯饼化的影响.研究表明：当地应力超过一定值时,出现岩芯饼化现象,即高地应力才会引起岩芯饼化;当径向应力达到35 MPa时,岩芯开始出现饼化现象,径向应力是影响岩芯饼化的主要因素,而轴向应力仅使岩芯表面产生局部破坏;径向应力一定的情况下,随着轴向应力的增大,岩芯饼化逐渐减弱;岩芯饼化的形成过程以剪切破坏为主,并伴有少量的拉破坏;岩芯饼化现象的发生是一个复杂的力学过程. |
|---|---|
| Bibliography: | 21-1344/T Numerical simulation method was used to explore the influence of in-situ stress on rock core discing under different stress combinations. The results showed that when the in-situ stress exceeds a certain value,rock core discing occurs. When the radial stress reaches 35 MPa,rock core discing occurs,and the radial stress is the main factor that affects rock core discing,while the axial stress only leads to the partial failure on core surface. At the same radial stress,the core discing weakens with the increase of axial stress. The formation process of core discing is mainly dominated by shear failure,accompanied with a little tension failure. Rock core discing is a complex mechanical process. MA Tian- hui1＇2,WANG Long1,2, XU Tao3,YU Qun1 , 2（1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116 023, China; 2. Institute of Rock Instability and Seismicity Research, Dalian University of Technology, Dalian 116 024, China; 3. School of Resources ＆ Civil Engi |
| ISSN: | 1005-3026 |
| DOI: | 10.3969/j.issn.1005-3026.2016.10.026 |