For this cause, it is extremely essential to follow with the security laws at any workstations. The other significant issue is using the proper underground mining equipments.

This equipment ought to be managed by well-qualified employees who are familiar with the safety rules and know how to make use of the machines correctly to avoid dangerous. (underground drilling)
Beneath the Earth, in the coalmine, there are few devices which help miners to output the coal. They are: longwall shearer, boom-type roadheader and coal crusher.
The 1st machine is called longwall shearer. It is a exploration machine, which works underground, in the so-called mining wall, or in the locate where the coal is straight output. It moves making use of the special conveyor (named scrapers); it does not use caterpillars (like as boom-type roadheader). The CM user runs such a device by the remote control. (roof bolter)
The second equipment used below ground is named boom-type roadheader. It moves making use of caterpillars and works below ground where drills roadways in the mine. Its front part with the tool drills the rock and move ahead. The obtained coal is transported at the bottom of the boom-type roadheader.
The last device, which will be provided in that text, is called coal crusher. It is a device used for crushing coals into smaller parts. Here are devices for crushing mineral coal and brown coal, too.