微波照射花岗岩力学性能试验研究  

Study on the Mechanical Properties of Microwave Irradiation Granite

作　　者：戴俊[1] 张敏 杨凡[1] 翟惠慧 朱清耀 DAI Jun;ZHANG Min;YANG Fan;ZHAI Hui-hui;ZHU Qing-yao(School of Architecture and Civil Engineering,Xi′an University of Science and Technology,Xi′an,Shanxi,710054,China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《建材技术与应用》2022年第2期1-6,共6页Research and Application of Building Materials

基　　金：国家自然科学基金项目(51174159)。

摘　　要：采用工业微波炉对花岗岩进行不同微波功率照射试验,分析经微波照射后的应力-应变曲线、抗拉强度、抗压强度和弹性模量等变化规律,探究微波照射对岩石力学性能的影响。研究结果表明:超过3.33 kW功率照射时,裂隙压密阶段的应力-应变曲线显著变长,随着微波功率的提高,试件破坏形式由脆性破坏向延性破坏转变;花岗岩的峰值应力、抗拉强度、弹性模量均随着微波照射功率增加发生不同程度折减,而峰值应变逐渐增大;基于弹性模量损伤变量和抗拉强度损伤变量增长速率,微波照射功率对损伤影响存在临界区间,在1.33~2.66 kW功率照射范围内,岩石损伤变量折减幅度最大。In order to study the effect of microwave irradiation on rock damage,industrial microwave waves tested granite with different microwave power,analyzed the stress-strain curve,tensile strength,compression strength and elastic modulus,and explored the effect of microwave irradiation on rock mechanical properties.The results show:Over 3.33 kW power irradiation,the stress-strain curve crack compaction stage is significantly longer,and with the improvement of microwave power,the specimen damage form changes from brittle damage to delayed damage;The peak stress,tensile strength and elastic modulus of granite all decrease to varying degrees with the increase of microwave irradiation power,while the peak strain gradually increases;Based on the growth rate of the elastic modulus damage variable and the tensile strength damage variables,there is a critical interval for the impact of microwave irradiation power on the damage,and the rock damage variable reducing the largest within 1.33~2.66 kW power irradiation.

关 键 词：微波照射 花岗岩 损伤变量 抗拉强度 抗压强度 

分 类 号：TD231[矿业工程—矿井建设]