摘要
深井软岩条件下扰动荷载会引起围岩流变变形,研制岩石流变扰动效应试验仪并进行试验,是建立巷道围岩本构关系的前提。试验仪应能对岩石试样施加长期恒定的轴压和围压,可以施加扰动荷载,并能测试扰动荷载及其引起的岩石变形量。为此研发的RRTS–II型岩石流变扰动效应试验仪,轴向荷载采用重力加载,适用于长期流变试验;加载采用齿轮与液压2级扩力,压力可达到100MPa,扩力比可达60～100倍;能够施加冲击与爆破2种扰动荷载,使用爆破振动记录仪测试扰动荷载强度,测量精度可达到0.015mm/s;配有三轴压力室,使用高压气体储能器提供围压,压力可达10MPa;并配备有荷载、位移、应变和振动测试系统及相应的数据处理软件。该试验仪适用于单轴和低围压三轴压缩蠕变扰动效应试验,试验结果表明,试验仪结构合理,性能稳定,精确度较高。
The rheological deformation of surrounding soft rock of roadway in deep mine can be caused by perturbation load. In order to establish the constitutive relation of roadway surrounding rock,the testing machine for rock rheological perturbation effect should be developed to conduct experiments. The testing machine is able to apply long-term constant axial pressure and confining pressure and perturbation load,and to test the perturbation load and rock deformation. The developed RRTS-II testing machine for rock rheological perturbation effect,whose axial pressure adopted by gravity loading,is suitable for long-term rheological test. The axial loading is achieved by gear and hydraulic structures;the pressure can reach 100 MPa,which is up to 60-100 times than the gravity loading. The perturbation load applied by impact and blast can be measured by blasting vibration recorder,whose measurement accuracy is 0.015 mm/s. The confining pressure applied by triaxial cell,which is achieved by high pressure gas energy storing device,can reach 10 MPa. The testing machine is equipped with load,displacement,strain and vibration test systems and corresponding data processing software. It is suitable for uniaxial and triaxial compression tests under low confining pressure with perturbation load. Test results show that the testing machine has reasonable structure,stable performance and high precision.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2011年第2期238-243,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划(973)项目(2007CB209400)
国家自然科学基金资助项目(50474029)
关键词
岩石力学
流变仪
岩石流变
扰动效应
重力加载
三轴压力室
rock mechanics
rheological testing machine
rock rheology
perturbation effect
gravity loading
triaxial cell
