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基于多分支卷积神经网络模型的智能找矿预测方法以宁夏中卫地区为例

Intelligent ore prospecting prediction using a multi-branch convolutional neural network—A case study of Zhongwei Region, Ningxia

  • 摘要: 随着全球能源转型加速推进,钴作为动力电池和高端合金的关键战略性矿产,其需求持续激增。传统的钴矿找矿预测方法高度依赖地质专家的经验与多源地球科学数据的综合解译,过程耗时费力且存在较强的主观性。当前,人工智能技术,特别是深度学习,正深刻变革矿产调查与勘查领域。构建了基于多分支卷积神经网络(MB−CNN)的钴矿智能找矿预测模型,旨在实现对钴矿成矿潜力的高效、精准预测。该模型创新性地设计了并行人工神经网络架构,通过3个不同卷积神经网络分别提取地质数据、地球物理数据、地球化学数据等异构数据中的深层特征,并进行特征整合。将训练后的模型应用于宁夏中卫地区,结果表明:构建的智能找矿预测模型相较于证据权重法和CNN2D模型,在预测精度与鲁棒性上均有显著提升。相比CNN2D,MB−CNN预测精度提高了9.39百分点,预测面积占比减小了7.73百分点,有效降低了预测结果的不确定性,为在新区域实现钴矿找矿突破提供了一种强有力的智能化解决方案。

     

    Abstract: Amidst the accelerating global energy transition, cobalt has emerged as a critical strategic mineral indispensable for power batteries and high-performance alloys, resulting in a sustained surge in its demand. Conventional cobalt ore prospecting prediction methods, which heavily depend on the empirical expertise of geologists and the integrative interpretation of multi-source geoscientific data, are not only time-consuming and labor-intensive but also inherently subjective. Currently, artificial intelligence, particularly deep learning, is profoundly transforming the field of mineral exploration and prospecting. In this study, an intelligent ore prospecting prediction model based on a multi-branch convolutional neural network (MB−CNN) was developed to enable efficient and accurate prediction of cobalt mineralization potential. The model innovatively designed a parallel artificial neural network architecture. It extracted deep features from heterogeneous data sources, including geological, geophysical, and geochemical data, through three distinct convolutional neural networks and subsequently integrated these features. The trained model was applied to the Zhongwei Area in Ningxia. The experimental results demonstrate that compared with the weight of evidence method and CNN2D model, the constructed intelligent ore prospecting prediction model shows significant improvements in both prediction accuracy and robustness. Specifically, compared to CNN2D, the prediction accuracy of MB−CNN is increased by 9.39 percentage point, while the prediction area proportion is reduced by 7.73 percentage point, effectively lowering the uncertainty of the prediction results. This provides a powerful intelligent solution for achieving breakthroughs in cobalt ore prospecting in new areas.

     

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