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孔隙压力作用下煤岩破裂及声发射特性的数值模拟
引用本文:徐涛,杨天鸿,唐春安,梁正召.孔隙压力作用下煤岩破裂及声发射特性的数值模拟[J].岩土力学,2004,25(10):1560-1564.
作者姓名:徐涛  杨天鸿  唐春安  梁正召
作者单位: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
基金项目:国家自然科学基金重大项目(No. 50490274),国家自然科学基金项目(No. 50204003,No. 50134040,No. 50174013)。
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

关 键 词:RFPA2D系统  孔隙压力  煤岩破裂  声发射  数值模拟
文章编号:1000-7598-(2004)10-1560-06
收稿时间:2003-07-09

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.Numerical simulation of failure and induced acoustic emission characteristics of coal/rock under pore pressure[J].Rock and Soil Mechanics,2004,25(10):1560-1564.
Authors:XU Tao    YANG Tian-hong  TANG Chun-an    LIANG Zheng-zhao
Institution:1.Research center for Numerical Tests on Material Failure,Dalian University Dalian 116622,.China; 2. Center for Rock Instability and Seismicity Research, Northeastern University, Shenyang 110004, China
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 Youngs 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 Youngs 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.
Keywords:RFPA code  pore pressure  failure of coal/rock  acoustic emission  numerical simulation
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