花岗岩循环加热水冷却后力学特征试验研究  

Experimental Study on Mechanical Properties of Granite Under Cyclic Heating and Water Cooling

作　　者：朱栋[1,2] 宗义江[2] 张修峰[2] ZHU Dong;ZONG Yijiang;ZHANG Xiufeng(China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Jiangsu Vocational Institute of Architectural Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学,江苏徐州市221100 [2]江苏建筑职业技术学院,江苏徐州市221100

出　　处：《矿业研究与开发》2020年第5期113-118,共6页Mining Research and Development

基　　金：江苏省高等学校自然科学研究面上项目(17KJB440003);江苏省高校自然科学研究面上项目资助(16KJB580014).

摘　　要：为研究花岗岩在循环加热和水冷却条件下的力学特性,将试样加热至预设温度后进行快速水冷却,采用单轴压缩试验和巴西劈裂试验研究了温度及加热水冷却循环次数对花岗岩试样的力学特性影响规律,并对试样破坏机制进行了探讨。研究结果表明:试样的基本力学参数均随温度的升高和循环次数的增加呈劣化趋势,其中温度对试样的劣化程度起控制作用;随温度和循环次数的增加,试样由脆性特征向塑性特征转化,其破坏形式由劈裂破坏向片状和颗粒剥落转化,试样颜色由灰白色向淡黄色转变。In order to study the mechanical properties of granite under the condition of cyclic heating and water cooling,the samples were heated to a preset temperature and then cooled by water rapidly.Uniaxial compression test and Brazilian split test were used to study the influence of temperature and cycle numbers of heating and water cooling on the mechanical properties of granite samples,and the failure mechanism of the samples was discussed.The results showed that the basic mechanical parameters of the samples presented a cracking tendency with the increase of temperature and cycle numbers,in which temperature controlled the cracking degree of the samples.With the increase of temperature and cycle numbers,the samples changed from brittleness to plasticity,their failure mode changed from splitting failure to flake and particle peeling,and the color of the samples changed from gray white to light yellow.

关 键 词：花岗岩 循环加热 水冷却 力学特征 破坏模式 

分 类 号：TD315[矿业工程—矿井建设]