  As an emerging technology that enables seamless integration between the
physical and virtual worlds, the Metaverse has great potential to be deployed
in the industrial production field with the development of extended reality
(XR) and next-generation communication networks. This deployment, called the
Industrial Metaverse, is used for product design, production operations,
industrial quality inspection, and product testing. However, there lacks of
in-depth understanding of the enabling technologies associated with the
Industrial Metaverse. This encompasses both the precise industrial scenarios
targeted by each technology and the potential migration of technologies
developed in other domains to the industrial sector. Driven by this issue, in
this article, we conduct a comprehensive survey of the state-of-the-art
literature on the Industrial Metaverse. Specifically, we first analyze the
advantages of the Metaverse for industrial production. Then, we review a
collection of key enabling technologies of the Industrial Metaverse, including
blockchain (BC), digital twin (DT), 6G, XR, and artificial intelligence (AI),
and analyze how these technologies can support different aspects of industrial
production. Subsequently, we present numerous formidable challenges encountered
within the Industrial Metaverse, including confidentiality and security
concerns, resource limitations, and interoperability constraints. Furthermore,
we investigate the extant solutions devised to address them. Finally, we
briefly outline several open issues and future research directions of the
Industrial Metaverse.
