China's mines are the deadliest in the world, with unregulated mines accounting for almost 80 per cent of the country's 16,000 mines.

An average of 13 workers are killed every day in the country, with most accidents blamed on lax safety standards and a rush to feed demand from a robust economy.

Despite pledges by the Chinese government to improve safety, regulations are poorly enforced while the country's soaring demand for energy and resources often means many unsafe mines continue to operate.

In 2008 alone more than 3,000 people died in coal mine accidents across China.