使用高压气体膨胀方法研究硬岩层中岩石碎片化和振动响应特征的研究
Dunwen Liu1, Yuhui Jin2, Kunpeng Cao1
1School of Resource and Safety Engineering, Central South University, Changsha, Hunan Province, China.
Scientific reports
|December 2, 2025
概括
这项研究优化了钻孔布局,以在岩石中进行低干扰挖掘. 这些发现增强了硬岩石的碎片化,并减少了敏感环境中的建筑损失.
科学领域:
- 岩石力学和工程 岩石力学和工程
- 环境地质学环境地质学
- 挖掘技术挖掘技术的使用
背景情况:
- 低干扰的挖掘对环境敏感地区至关重要,对生态保护和建筑效率都有影响.
- 优化钻井布局对于有效的岩石质量工程和最大限度地减少环境破坏至关重要.
研究的目的:
- 系统地研究用于低干扰挖掘的石灰岩层中的多参数钻井布局方案.
- 为了建立可靠的设计参数高压气体扩张在硬岩石破裂.
- 确定最佳参数,以提高岩石碎裂效率和减少损失.
主要方法:
- 组合方法:小规模模型测试,现场测量和FLAC3D数值模拟.
- 使用PVDF压电传感器,在气体膨胀过程中捕获钻井壁的动态力 (高峰力高达581MPa).
- 基于埋葬深度,钻孔间距和膨胀管密度的动态响应模式 (塑料区域,近场振动) 的比较.
主要成果:
- 成功验证了高压气体膨胀的硬岩石裂解能力.
- 确定了最佳参数:1.5米×2.0米的水平钻孔间距和1.5米的钻孔深度 (1.3米的埋藏深度).
- 显著提高了硬岩石碎片化效率和密集的断裂网络诱导.
结论:
- 优化的钻井模式大大提高了硬岩碎片化效率.
- 这种方法在具有挑战性的地质条件下显著减少了机械岩石破碎损失.
- 通过这项研究优化了低干扰挖掘技术,为环境和经济带来了巨大的好处.
相关概念视频
01:17Sound as Pressure Waves
4.4K
Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
The pressure fluctuation depends on the difference in displacements between the successive points in the...
4.4K
01:20Microcracking in Concrete
413
Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
413