基于能量原理的砂岩破坏准则研究  

Study on sandstone failure criterion based on energy principle

作　　者：刘文博[1] 张树光[1] 郑大为[1] 赵洪达 LIU Wenbo;ZHANG Shuguang;ZHENG Dawei;ZHAO Hongda(School of Civil Engineering,Liaoning Technical University,Fuxiu 123000,China;Mining Design and Research Institute Limited, Anshan Iron and Steel Group ,Anshan 114005, China)

机构地区：[1]辽宁工程技术大学土木工程学院,辽宁阜新123000 [2]鞍钢集团矿业设计研究院有限公司,辽宁鞍山114005

出　　处：《煤炭科学技术》2017年第12期70-75,共6页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51274109)

摘　　要：为了分析不同孔隙水压条件对砂岩应力-应变关系的影响,采用MTS812.03岩石试验机对饱和砂岩进行不同围压、孔隙水压常规三轴压缩试验,结合能量原理推导出适用于水岩耦合下砂岩破坏准则,并运用于数值模拟中进行分析验证。结果表明:由于岩石加载过程自身就是一个能量积聚与释放的过程,通过能量原理推导破坏准则,能更好地反映岩石破坏的真实情况,并通过引入孔隙水压影响系数,来弥补软件不能模拟由于水压造成的裂隙扩展过程的缺陷,最终通过对比分析得出,能量破坏准则的计算值与实际值相差小于5%,而Drucker-Prager与Hoek-Brown准则误差值最大达到了35.34%和37.11%。因此,利用FLAC3D软件通过基于能量原理推导出在水岩耦合作用下岩石的破坏准则是正确和合理的。In order to analyze the different pore water pressure ＇affected to the stress and strain relationship of the sandstone, an MTS812.03 rock test device was applied to the conventional triaxial compression test on the saturated sandstone under different confined pressure and pore water pressure. In combination with the energy principle, the sandstone failure criterion suitable to the water and rock coupling was deduced and was applied to the numerical simulation for the analysis and verification. The results showed that due to the rock loading process was an energy accumulation and releasing process ,the failure criterion deduced with the energy principle could well reflect the real condition of the rock failure. The introduction of the pore water pressure influence coefficient could make up the detect due to the software could not simulate the cracking expansion caused by the water pressure. Finally,the comparison analysis showed that the cah＇ulation value of the energy failure criterion would be 5% smaller than the actual value and the error value of the Drucker-Prager and Hoek-Brown Criterions would be 35.34% and 37.11% in the max. Therefore, based on the energy principle criterion, the FLAC3D sotiware could be applied to deduce the rock failure criterion being correct and rational under the water and rock coupling role.

关 键 词：砂岩 孔隙水压 水岩耦合 能量原理 破坏准则 

分 类 号：TD353[矿业工程—矿井建设]