关于分级破碎岩石质量的压缩变形演变和能量消散特征的实验研究
Xu Peiyun1,2, Yang Wuyi3, Li Shugang3,4
1School of Energy and Mining Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China. xupy@xust.edu.cn.
Scientific reports
|January 29, 2026
概括
研究压缩下破碎的岩石质量显示,压缩发生在三个阶段. 较高的分级指数导致更多的初始空隙空间,但最终的减少较少,影响能量释放模式.
科学领域:
- 岩石机械 岩石机械 岩石机械
- 地质技术工程地质技术工程
- 断裂力学 断裂力学 断裂力学
背景情况:
- 了解破碎岩石质量的机械行为在高峰崩区对于矿山的稳定性至关重要.
- 粒子大小分布 (分级) 对岩石质量变形和能量消耗的影响需要进一步研究.
研究的目的:
- 为了研究破碎岩石质量的变形和能量消耗特征,在侧面限制的轴向压缩下具有不同的Talbol分级指数.
- 分析岩石质量紧缩,碎形维度变化和声辐射 (AE) 能量释放模式之间的关系.
主要方法:
- 轴向压缩测试是在破碎的岩石质量上进行的,并控制了横向的限制.
- 塔尔博尔分级指数 (n=0.2-1.0) 变化以表示不同的颗粒大小分布.
- 使用声辐射 (AE) 技术实时监控能量释放.
主要成果:
- 岩石质量压缩发生在三个不同的阶段:初始,线性和塑性巩固,空隙分数因应力而非线性减少.
- 更高的分级指数导致了更高的初始空隙分数,但压缩后空隙空间的最终减少较小.
- 压缩后,碎形尺寸显著增加,表明岩石质结构的均化.
- 声辐射能量演变与压缩阶段相关,初始阶段显示低能高频信号,后期阶段显示高能低频事件.
结论:
- 渐变指数显著影响破碎岩石质量的压缩行为和空隙减小.
- 碎形维度是岩石质量紧缩过程中结构均化的指标.
- 声辐射分析提供了关于岩石质量变形过程中的能量消散机制和颗粒破裂过程的见解,基于渐变指数观察到不同的能量释放模式.
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