Changzhi Coal Mine Accident: What Happened at the Liushenyu Mine in Shanxi

Monitoring systems detected carbon monoxide concentrations exceeding safety limits, a dangerous condition that can quickly cause poisoning in enclosed underground environments.

Large‑scale rescue operations were launched overnight as emergency teams worked to locate and evacuate trapped miners. Early updates indicated that many workers had already been brought to the surface, but dozens remained underground as rescuers continued searching affected sections of the mine.

How many miners were underground

The initial headcount from official reports provides the clearest early picture of the scale of the incident:

• 247 miners were underground at the time of the accident.
• 157 miners had been brought to the surface during the early rescue stage.
• 4 miners were confirmed dead.
• 90 miners remained trapped underground in the initial reports.
• 16 of the trapped miners were reported to be in critical condition.

Rescue numbers in mining disasters often change quickly as workers are located or conditions inside the mine become clearer.

Possible causes of the carbon monoxide buildup

At the time of the early reports, no official cause had been confirmed. Authorities had not yet determined what triggered the sudden increase in carbon monoxide levels.

In underground coal mines, dangerous carbon monoxide accumulations can result from several types of incidents, including:

• Ventilation system failures
• Fires involving equipment or conveyor belts
• Explosions or gas ignition events
• Malfunctions in mining machinery

However, investigators had not publicly linked the Changzhi accident to any specific cause, and attributing it to one of these factors would be speculative until a formal investigation is completed.

Shanxi’s role in China’s coal industry

The accident occurred in Shanxi Province, one of China’s most important coal‑producing regions. The province has long been central to the country’s energy supply and hosts many large underground mining operations.

Because of the scale of coal production in the region, Shanxi has historically experienced some of China’s most serious mining accidents. Authorities have repeatedly introduced stricter regulations and monitoring systems to reduce risks in the industry.

China’s broader mine‑safety record

Official data indicates that coal‑mining accidents and fatalities in China have generally declined in recent years, reflecting tighter safety oversight and improved monitoring systems. In 2025, the number of fatalities in mining accidents fell 6.1% year‑on‑year, with serious accidents and deaths from them also decreasing.

The government has also implemented new safety regulations and nationwide inspection campaigns designed to detect hazards and enforce stricter safety practices in coal mines.

Despite these improvements, incidents still occur due to the inherently hazardous conditions of underground mining and the vast scale of China’s coal industry.

What happens next

Following accidents of this scale, Chinese authorities typically launch formal investigations to determine the cause, assess safety compliance, and assign responsibility if violations are found.

For the Changzhi incident, rescue efforts and the ongoing investigation will determine:

• The final casualty and rescue numbers
• The exact cause of the carbon monoxide surge
• Whether operational or safety failures contributed to the accident

Until those investigations are complete, the available information reflects only the early stage of a rapidly developing mining disaster.