To date, robots have been used in patrolling, picking refuse and nine other situations.

The city sees an annual coal output of over 100 million tonnes regardless of its exhausted quality coal resources.

Twelve of the 18 coal mines to be closed have an annual output of 600,000 tonnes or less.

The export reached 1.37 billion yuan (194.49 million U.S. dollars) in H1, the customs said on Friday.

An announcement from the official receiver is anticipated imminently, the BBC said on Thursday.

According to a three-year work plan regarding the coal industry's development, by 2021, the number of coal mines will be limited to within 200.

Nationally the coal supply and demand balanced well in the first six months.

ferro-alloys.com:Worldwide coal go through by third as greenhouse gas emissions rise