Among those machines is an air rotary drill, which is easier to handle and faster in drilling speed than the existing ones. It can work efficiently in the faces with different beds.

They also applied a new kind of equipment, which can operate a rotary drill, a rotary-percussion drill and a sawing machine alternately with one electric motor and flexible shaft, to coal faces, thus considerably raising the level of mechanization.

The above-said kinds of equipment were developed by the Academy of Coal Mining Science.