钻井孔断层扫描仪用于寻找和评估矿石矿床
A A Golubev1, A V Kantsyrev1, I G Alekseev1
1State Scientific Center of Russian Federation "Troitsk Institute of Innovative and Thermonuclear Research," Moscow, Russia.
The Review of scientific instruments
|November 19, 2025
概括
这项研究引入了用于矿石勘探的钻井子断层扫描仪,测量了岩石中的宇宙射线子衰减. 它成功地以5%的准确度展示了3D密度重建,证明了它对深度地质调查的操作能力.
科学领域:
- 地质物理学 地质物理学
- 粒子物理学 粒子物理学
- 勘探地质物理学 地质物理学
背景情况:
- 宇宙射线的子可以深入地.
- 流衰减对岩石密度敏感,提供一种非侵入性的地质物理调查方法.
- 现有的钻井方法可能对矿石勘探的深度或分辨率有限制.
研究的目的:
- 开发和测试用于深层矿石勘探的钻井子断层扫描仪.
- 为了测量宇宙射线离子流减弱,用于岩石密度重建.
- 为了在地下环境中实现精确的3D密度映射.
主要方法:
- 使用一个钻井孔子断层扫描仪与四个探测器模块和600多个采集通道.
- 采用了三层嵌套的圆柱形光纤.
- 开发了一个基于3D密度分布的同时代重建技术 (SIRT) 的重建算法.
主要成果:
- 钻井孔子断层扫描仪在深度高达1500m.w.e.的深度上是可操作的. 它的研究半径为400米.
- 在角测量方面取得了高精度 (阿齐木特~17mrad,顶峰~19mrad).
- 在积累了足够的子统计数据 (≥5 × 10 ^ 5子) 后,对平均面积密度的5%内证明了3D密度重建的准确性.
结论:
- 开发的钻井孔子断层扫描仪是深度地质调查和矿石勘探的有效工具.
- 子流减弱方法提供了准确的平均岩石密度信息.
- 该系统的性能验证了其在具有挑战性的环境中进行详细的3D密度映射的潜力.
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