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。
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.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第10期1560-1564,1574,共6页
Rock and Soil Mechanics
基金
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)。
关键词
RFPA^20系统
孔隙压力
煤岩破裂
声发射
数值模拟
Acoustic emissions
Coal
Compressive strength
Elastic moduli
Engineering geology
Failure (mechanical)
Numerical analysis
Pore pressure
