安泰龙, 茅献彪, 孙凤娟. 卸荷速率对岩石强度影响的试验研究[J]. 力学与实践, 2009, 31(6): 21-24. DOI: 10.6052/1000-0879-lxysj2008-407
引用本文: 安泰龙, 茅献彪, 孙凤娟. 卸荷速率对岩石强度影响的试验研究[J]. 力学与实践, 2009, 31(6): 21-24. DOI: 10.6052/1000-0879-lxysj2008-407
Xianbiao Mao, . THE EFFECTS OF DIFFERENT UNLOADING RATES ON ROCK STRENGTH[J]. MECHANICS IN ENGINEERING, 2009, 31(6): 21-24. DOI: 10.6052/1000-0879-lxysj2008-407
Citation: Xianbiao Mao, . THE EFFECTS OF DIFFERENT UNLOADING RATES ON ROCK STRENGTH[J]. MECHANICS IN ENGINEERING, 2009, 31(6): 21-24. DOI: 10.6052/1000-0879-lxysj2008-407

卸荷速率对岩石强度影响的试验研究

THE EFFECTS OF DIFFERENT UNLOADING RATES ON ROCK STRENGTH

  • 摘要: 通过MTS 815.02型电液伺服岩石力学试验系统,研究砂岩试样在常规三轴条件下卸围压过程中的应力-应变关系,探讨不同卸荷速率对试样强度的影响情况,分析得出卸荷速率与试样强度的变化规律;观察、测量破坏试样的破裂特征及角度,初步探究试样在卸荷作用下的破坏机理;研究成果可为工程实践的岩体卸荷问题提供一定的理论参考.

     

    Abstract: By using MTS series 815.02 model servo-controlled stiffrock mechanics testing system, the stress-strain characteristicsof the sandstone specimen were studied in unloading process under tri-axialcondition with different unloading rates. The relation between strength and unloadingrate was analyzed and a formula was obtained.The fracture mechanism in unloading process was studied by observing thecrack characteristics. The findings can provide sometheoretical reference for engineering practice when analyzing the rock massunloading problems.

     

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