Numerical simulation of failure and induced acoustic emission characteristics of coal/rock under pore pressure

XU Tao; YANG Tian-hong; TANG Chun-an; LIANG Zheng-zhao

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Numerical simulation of failure and induced acoustic emission characteristics of coal/rock under pore pressure

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- Numerical simulation of failure and induced acoustic emission characteristics of coal/rock under pore pressure
- Vol. 25, Issue 10期　刊出日, (2004)
- 作者机构：
  
  1. 大连大学材科破坏力学数值试验研究中心,辽宁,大连,116622
  2. 东北大学岩石破裂与失稳研究中心,辽宁,沈阳,110004
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU451
- Online First：25 July 2014，
  
  Published：2004
- 稿件说明：
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XU Tao, YANG Tian-hong, TANG Chun-an, et al. Numerical simulation of failure and induced acoustic emission characteristics of coal/rock under pore pressure[J]. 2004, 25(10期　刊出日).
DOI：

XU Tao, YANG Tian-hong, TANG Chun-an, et al. Numerical simulation of failure and induced acoustic emission characteristics of coal/rock under pore pressure[J]. 2004, 25(10期　刊出日). DOI：

摘要

运用嵌入孔隙压力的岩石破裂过程分析RFPA2D系统，对孔隙压力作用下煤岩的变形强度特性进行了数值试验研究。数值试验结果表明，在孔隙压力一定时，随着围压的增加，煤岩的杨氏模量、抗压强度都随之增高；而当围压一定时，随着孔隙压力的增加，煤岩的杨氏模量、抗压强度则稍有降低，而且峰值强度后的应力-应变曲线有呈现脆性的趋势。此外数值模拟还研究了不同围压及孔隙压力作用下煤岩的声发射特性

Abstract

Using pore pressure incorporated rock failure process analysis (RFPA2D) code

the deformation and strength properties of coal/rock under pore pressure is numerically studied. The numerically simulated results indicate that the Young’s modulus and compressive strength of coal/rock gradually increase with the increase of the confining pressure for a given pore pressure; and for a given confining pressure

the Young’s modulus and compressive strength of coal/rock gradually decrease with the increase of the pore pressure. In addition

the characteristics of acoustic emission during the failure process of coal/rock are also numerically investigated under various confining pressures and pore pressures.

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