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温–压耦合及动力扰动下岩石破碎的能量耗散
引用本文:尹土兵,李夕兵,叶洲元,宫凤强,周子龙. 温–压耦合及动力扰动下岩石破碎的能量耗散[J]. 岩石力学与工程学报, 2013, 32(6): 1197-1202
作者姓名:尹土兵  李夕兵  叶洲元  宫凤强  周子龙
作者单位:(1. 中南大学 资源与安全工程学院,湖南 长沙 410083;2. 中南大学 深部金属矿产开发与灾害控制湖南省重点实验室,湖南 长沙 410083)
基金项目:国家重点基础研究发展计划(973)项目(2010CB732004);国家自然科学基金资助项目(50934006,50904079)
摘    要: 采用自行研制的温–压耦合及动力扰动试验系统,在4个温度等级(20 ℃,100 ℃,200 ℃,300 ℃)且每个温度等级的试样分别施加0,20,60,80 MPa的轴向静压力,对砂岩试样进行冲击试验。基于常规的霍普金森杆压缩试验中的能量耗散原理,计算出不同温度作用下动静组合加载岩石试样的能量耗散规律。结果表明:当动载荷保持不变,岩样在温度为20 ℃,200 ℃和300 ℃且预压力为20 MPa时,能量吸收率最大;而岩石试样作用温度为100 ℃时,当冲击载荷不变,不加轴压(轴压为0 MPa)时的能量吸收率最大。研究结果有助于研究高温、高应力作用下岩石破碎机制,为研究高温作用下岩体工程起到一定的参考作用。

关 键 词:岩石力学高温动静组合荷载能量耗散霍普金森杆
收稿时间:2012-11-05

ENERGY DISSIPATION OF ROCK FRACTURE UNDER THERMO- MECHANICAL COUPLING AND DYNAMIC DISTURBANCES
YIN Tubing,LI Xibing,YE Zhouyuan,GONG Fengqiang,ZHOU Zilong. ENERGY DISSIPATION OF ROCK FRACTURE UNDER THERMO- MECHANICAL COUPLING AND DYNAMIC DISTURBANCES[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(6): 1197-1202
Authors:YIN Tubing  LI Xibing  YE Zhouyuan  GONG Fengqiang  ZHOU Zilong
Affiliation:(1. School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410083,China;2. Hunan Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines,Central South University,Changsha,Hunan 410083,China)
Abstract:Under different temperatures(20 ℃,100 ℃,200 ℃,300 ℃),the impact experiments of sandstone samples with different axial pressures(0,20,60,80 MPa) were carried out by a self-developed dynamic testing system under thermo-mechanical coupling. With the test results,the damage dissipation energy of rock under thermo-mechanical coupling can be calculated based on the principle of energy dissipation in conventional split Hopkinson pressure bar(SHPB). The results show that,at a given dynamic load,rock samples at temperatures of 20 ℃,200 ℃ and 300 ℃ and axial pressure of 20 MPa have the maximal energy-absorb capability;but at temperature of 100 ℃,rock samples under axial pressure of 0 MPa have the maximal energy-absorb capability. The results are helpful for understanding rock fracture mechanism of rock under high temperatures and can be used in the practical rock engineering.
Keywords:rock mechanics  high temperatures  static-dynamic coupling loads  energy dissipation  split hopkinson pressure bar(SHPB)
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