高温后花岗岩变形特性试验研究  

Experimental Study on Deformation Characters of Granite after High Temperature

作　　者：张传虎 张强[1] 蒋斌松[1] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《煤炭技术》2018年第3期70-72,共3页Coal Technology

基　　金：国家自然科学基金资助项目(51204168);博士后科学基金资助项目(2013M531424;2015M580493)

摘　　要：采用YNS2000微机控制电液伺服试验机压剪试验、单轴压缩试验研究了不同温度高温作用后甘肃北山高放射核废料拟选区花岗岩力学特性变化规律。试验结果表明:(1)当高温温度低于400℃时,花岗岩黏聚力c、内摩擦角φ均随温度升高呈非线性增大趋势;温度超过400℃之后,花岗岩试样黏聚力c、内摩擦角φ均随温度升高呈非线性减小趋势;(2)当温度低于400℃时,声发射振铃主要集中在峰值荷载附近;当温度高于600℃时,峰前振铃数明显增加、峰值附近振铃数明显减小。The YNS2000 microcomputer controlled electro hydraulic servo universal testing machine was used to study the effects of high temperature on mechanical properties of granite in Gansu Beishan area,high - level radioactive waste repository by variable shear test and uniaxial compression test. The results show that： （1）When the temperature is lower than 400 ℃ ,the cohesion c and the internal friction angle φof the granite samples increase meeting the quadratic nonlinear law; After the temperature exceeds 400 ℃ ,the cohesion cand the internal friction angle φ decrease meeting the quadratic nonlinear law; （2）When the temperature is lower than 400 ℃ ,the acoustic emission （AE） is mainly concentrates near the peak load;when the temperature is higher than 600 ℃ ,the pre peak AE increases significantly,and the AE near the peak decreases significantly.

关 键 词：花岗岩 高温 抗剪特性 声发射 

分 类 号：TD315[矿业工程—矿井建设]