Suoi Lai Extension Underground Mine Project

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Suoi Lai Extension Underground Mine Project is an operating coal mine in Ha Long City, Quang Ninh Province, Ha Long, Quang Ninh, Vietnam.

Location

Table 1: Project-level location details

Mine Name	Location	Coordinates (WGS 84)
Suoi Lai Extension Underground Mine Project	Ha Long City, Quang Ninh Province, Ha Long, Quang Ninh, Vietnam	21.0043424347568, 107.124190300193 (exact)

The map below shows the exact location of the coal mine:

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Project Details

Table 2: Project status

Status	Status Detail	Project Type	Opening Year	Closing Year
Operating	–	Expansion	–	2034 (planned)

Table 3: Operation details

Note: The asterisk (*) signifies that the value is a GEM estimated figure.

Capacity (Mtpa)	Production (Mtpa)	Year of Production	Mine Type	Mining Method	Mine Size (km2)	Mine Depth (m)	Workforce Size
0.7	–	–	Underground	Longwall	–	188	571.6232304*

Table 4: Coal resources and destination

Total Reserves (Mt)	Year of Total Reserves Recorded	Total Resources (Mt)	Coalfield	Coal Type	Coal Grade	Primary Consumer/ Destination
–	–	–	Quang Ninh	Anthracite	Thermal	–

Table 5: Ownership and parent company

Note: To access more comprehensive data on energy ownership, please visit the Global Energy Ownership Tracker.

Owner	Parent Company	Headquarters
Hon Gai Coal Company [100.0%]	Vietnam National Coal (Vinacomin)	Vietnam

Note: The above sections were automatically generated and are based on data from the Global Coal Mine Tracker August 2026 release.

Background

The Suoi Lai Extension Underground Mine Project (phase I) is an underground coal mine expansion project in Ha Long City, Quang Ninh Province, Vietnam, developed by Hon Gai Coal Company, a subsidiary of the state-owned Vietnam National Coal – Mineral Industries Group (Vinacomin/TKV). Hon Gai Coal Company operates several dispersed, comparatively small and short-lived mine sites around Ha Long, and maintains average annual output of about 2 million tonnes of coal across its operations, generating annual revenue in the range of 2.6–2.8 trillion VND and providing stable employment for roughly 4,000 workers.

The project has a design capacity of 700,000 tonnes of coal per year, which it was expected to reach by 2019, and is planned to operate through 2034. Access to the underground workings is via a twin inclined shaft pair at level +32/-188 metres, constructed by the company's Workshop No. 5 (Giáp Khẩu) as part of works marking the 80th anniversary of Vietnam's coal-mining workforce in 2016.

On 29 July 2024, an accident occurred at a longwall face at level -110, seam 12, within the project area, resulting in the deaths of five workers. TKV and the coal workers' trade union each provided initial financial assistance of 20 million VND per deceased worker, and Hon Gai Coal Company provided an additional 100 million VND per affected family along with funeral costs and statutory benefits; the cause of the accident was under investigation at the time of reporting. As with other underground mines in the Hon Gai coal-mining region, coal produced is anthracite, characteristic of the wider Quang Ninh coalfield, and is used mainly for thermal purposes.

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Additional data

To access additional data, including an interactive map of world coal mines, a downloadable dataset, and summary data, please visit the Global Coal Mine Tracker on the Global Energy Monitor website.