理论与试验研究

微波辐射参数对砂岩力学及损伤特征影响

  • 孙晓宇 ,
  • 王航龙 ,
  • 彭俊 ,
  • 王林飞 ,
  • 潘堃
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  • 1.昆明理工大学 国土资源工程学院,昆明 650093;
    2.中钢集团马鞍山矿山研究总院有限公司 金属矿山安全与健康国家重点实验室,安徽 马鞍山 243000
孙晓宇(1999—),男,山东滨州人,硕士生,主要从事岩石力学等领域科研工作。E-mail:sxyedu_mail@163.com
王航龙(1983—),男,云南昆明人,硕士,高级工程师,主要从事露天矿开采设计、边坡稳定、边坡灾害防治等方面的研究。E-mail:93544060@qq.com

收稿日期: 2025-04-20

  网络出版日期: 2026-04-28

基金资助

国家重点研发计划青年科学家项目(2022YFC2905700);国家重点研发计划(2023YFC2907201);国家自然科学基金重点项目(52130403);安徽省自然科学基金(2208085ME120);安徽省重点研发计划(2022m07020001)

The Influence of Microwave Radiation Parameters on the Mechanical Properties and Damage Behavior of Sandstone

  • Sun Xiaoyu ,
  • Wang Hanglong ,
  • Peng Jun ,
  • Wang Linfei ,
  • Pan Kun
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  • 1. Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, P.R. China;
    2. State Key Laboratory of Safety and Health for Metal Mines, Sinosteel Maanshan Institute of Mining Research Co., Ltd., Maanshan, Anhui 243000, P.R. China

Received date: 2025-04-20

  Online published: 2026-04-28

摘要

微波辐射作为新兴破岩技术在辅助机械破岩方面展现出了广泛的应用前景,为探究微波辐射对石英砂岩的损伤作用机制,研究了不同功率微波和不同微波辐射时间作用下石英砂岩单轴抗压强度、波速等性质的变化规律及宏细观损伤特征。结果表明:随微波辐射功率和辐射时间增大,石英砂岩单轴抗压强度和弹性模量整体呈下降趋势;P波和S波波速整体呈下降趋势;损伤因子呈上升趋势,并且辐射时间越长,损伤因子上升的幅度越大。随微波辐射功率和辐射时间增大,石英砂岩破碎程度显著增加,碎块尺寸逐渐减小,数量逐渐增多;破坏形式从单一的剪切破坏转变为沿脆弱面的剪切破坏和劈裂破坏;SEM图像和分形维数D值结果表明,随微波辐射时间增大,试样内部裂纹的数量、长度、宽度和深度均呈增加趋势,从初始的单一裂纹逐渐演变为叠加裂纹。

本文引用格式

孙晓宇 , 王航龙 , 彭俊 , 王林飞 , 潘堃 . 微波辐射参数对砂岩力学及损伤特征影响[J]. 地下空间与工程学报, 2026 , 22(2) : 528 -538 . DOI: 10.20174/j.JUSE.2026.02.14

Abstract

Microwave radiation, as an emerging rock-breaking technology, shows promising applications in assisting mechanical rock fragmentation. To explore the damage mechanisms of microwave radiation on quartz sandstone, this study investigates the variations in uniaxial compressive strength, wave velocity, and macro-microscopic damage characteristics of quartz sandstone under different microwave powers and exposure times. The results indicate that with increasing microwave power and exposure time, the uniaxial compressive strength and elastic modulus exhibit a decreasing trend, while peak strain gradually increases. Both P-wave and S-wave velocities show an overall decline. The damage factor shows an upward trend, and the longer the radiation time, the greater the increase in the damage factor. As microwave power and exposure time increase, the degree of quartz sandstone fragmentation significantly intensifies, resulting in smaller and more numerous fragments. The failure mode shifts from a single shear failure to shear and cleavage along fragile planes. SEM images and fractal dimension (D-value) results indicate that as microwave exposure time increases, the number, length, width, and depth of internal cracks in specimens show an increasing trend, evolving from initial single cracks to superimposed fractures.

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