Process in mining coal

Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. At Griffin Coal’s Collie mines open cut mining methods are used. The mining process involves the removal of overburden and extraction of coal but can be considered as four distinct operations: 1. Topsoil. Topsoil is removed ahead of mining and either spread directly on shaped rehabilitation areas or stockpiled for later use. Thanks for A2A! The selection of process for mining the coal deposit is attributed to various parameters, among those, the important ones are: 1. Dip of the coal.
Coal Mining and Processing. Mining the Coal. Coal miners use giant machines to remove coal from the ground. They use two methods: surface or underground mining. The coal is then loaded on to large trucks or conveyors for transport to either the coal preparation plant or direct to where it will be used. Land Reclamation after Surface Mining Land reclamation is the process of protecting, restoring, and possibly even improving the land before, during, and after surface mining. Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity. At Griffin Coal’s Collie mines open cut mining methods are used. The mining process involves the removal of overburden and extraction of coal but can be considered as four distinct operations: 1. Topsoil. Topsoil is removed ahead of mining and either spread directly on shaped rehabilitation areas or stockpiled for later use. Thanks for A2A! The selection of process for mining the coal deposit is attributed to various parameters, among those, the important ones are: 1. Dip of the coal.

 

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The Mining Process | Introduction | underground COAL

Thanks for A2A! The selection of process for mining the coal deposit is attributed to various parameters, among those, the important ones are: 1. Dip of the coal. The Mining Process. Once a mining lease has been awarded to an operator, exploration (i.e. evaluation of the resource) takes place, followed by a planning and. Read chapter 4 Coal Mining and Processing: Coal will continue to provide a major portion of energy requirements in the United States for at least the next.

The coal is then loaded on to large trucks or conveyors for transport to either the coal preparation plant or direct to where it will be used. Land Reclamation after Surface Mining Land reclamation is the process of protecting, restoring, and possibly even improving the land before, during, and after surface mining. Over 7269 million tonnes (Mt) of hard coal are currently produced worldwide and 787 Mt of lignite. Coal is mined by two methods: surface or 'opencast' mining, and. Thanks for A2A! The selection of process for mining the coal deposit is attributed to various parameters, among those, the important ones are: 1. Dip of the coal.


Step 2. Mining

Mining can take place through open cut or underground mining methods. At Griffin Coal’s Collie mines open cut mining methods are used. The mining process involves the removal of overburden and extraction of coal but can be considered as four distinct operations:

1. Topsoil

Topsoil is removed ahead of mining and either spread directly on shaped rehabilitation areas or stockpiled for later use. This operation is performed using dozers, front end loaders and trucks.

2. Laterite

The cap rock (up to 2 metres thick) is either ‘ripped’ by dozers or blasted and recovered for use as road surfacing material.

3. Overburden

All overburden apart from the ‘Nakina Formation’ is drilled with rotary ‘blast hole’ drilling rigs and charged with bulk explosive, typically a mixture of ammonium nitrate and fuel oil (ANFO).

After blasting, overburden is loaded by hydraulic excavator or front end loader into rear dump trucks and placed in overburden dumps. Initially these had to be placed out of the pit in order to create a large enough hole to work in. The worked over areas of the pit are now filled in, a process known as backfilling.

When the mine gets to the back firing stage, the hole gets bigger and moves slowly across the deposit. Then overburden materials are removed from the operating faces and dumped into backfill on the other side of the mine.

In its operations, Griffin Coal places all overburden into mined out areas and focuses on the rehabilitation of the newly created final land surface.

4. Coal

When overburden has been removed from the coal seam, the roof of the seam is cleaned using bulldozers. The coal seam is then drilled and blasted. Bulldozers clean down to the floor of the coal seam and front end loaders and coal trucks transport coal to either the Ewington Crushing Facility or direct to Muja Power Station.

In some areas, coal can be loaded directly into trucks using a large backhoe, without need for bulldozing. Once the coal has been extracted it is then processed.

Click Here to find out more about processing coal.

Click Here to find out more about open cut and underground mining methods.

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