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Paper Publications

Title of Paper:岩芯饼化机制及应力分析

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Date of Publication:2016-10-15

Journal:东北大学学报(自然科学版)

Included Journals:EI、PKU、ISTIC、CSCD、Scopus

Volume:37

Issue:10

Page Number:1491-1495

ISSN No.:1005-3026

Key Words:岩芯饼化;径向应力;轴向应力;剪切破坏;拉破坏

Abstract: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。

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