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高频超声波振动负荷对硬岩孔裂结构的影响:基于3D重建技术的研究

Jianguo Zhang¹, Lei Zhang², Xufeng Wang²

¹State Key Laboratory of Coking Coal Resources Green Exploitation, China Pingmei Shenma Group, Pingdingshan 467000, China.

Materials (Basel, Switzerland)

|March 13, 2024

概括

超声波振动会导致岩石毛孔结构发生显著变化,导致毛孔变小,微孔扩大. 这项研究揭示了高频振动如何改变岩石中孔裂变的演变.

科学领域:

地质物理学地质物理学
材料科学材料科学材料科学
岩石机械学岩石机械学

背景情况:

岩石断裂涉及微观裂的启动和传播.
了解超声波振动下的岩石损伤至关重要.
在高频负荷下调查孔骨折的演变是关键.

研究的目的:

在超声波振动下研究岩石的损伤和断裂机制.
分析中孔骨折结构的进化模式,以应对高频振动负载.

主要方法:

标准的红色砂岩样品经过了超声波高频振动测试.
核磁共振 (NMR) 和计算机断层扫描 (CT) 在不同的激发阶段进行.
获得横向放松时间 (T2) 光谱和CT图像用于分层分析.

主要成果:

核磁共振测试显示,在振动下,岩石内形成较小的毛孔和微孔的扩张.
从CT图像的3D重建显示,在120秒的振动后,毛孔数量增加 (高达145.56%) 和最大毛孔体积 (高达239.42%) 增加.
在上层,中层和下层岩石段中观察到孔隙结构的显著变化.

结论:

高频振动显著改变岩石中孔结构.
这项研究提供了关于在振动负载下岩石碎片化机制的见解.
这些发现有助于理解在动态条件下的岩石损伤演变.

关键词:

扫描 CT 扫描扫描 CT 扫描高频振动是一种高频振动.核磁共振是一种核磁共振.三维重建的三维重建

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