Geothermal Energy from Abandoned Mines

Igne is expert in accessing and then utilisation the geothermal energy in water in abandoned and flooded mine workings: we can heat entire districts with minewater geothermal boreholes


Energy from mine water

Mine water geothermal boreholes are a type of geothermal energy system that uses the heat stored in mine water to heat and cool buildings.

Mine water is a renewable resource that is available in many parts of the world. It is also a reliable source of heat, as the temperature of mine water remains relatively constant throughout the year.

Igne is a leading provider of mine water geothermal boreholes. We have a team of experienced professionals who drill boreholes for mine water geothermal systems for a variety of applications, including:

  • Commercial buildings
  • Residential buildings
  • Industrial facilities
  • Aquaculture facilities

How it works

How does drilling for mine water work?

The process of drilling boreholes to tap into mine water is similar to drilling boreholes for other types of geothermal energy. However, there are a few important differences.

First, mine water geothermal boreholes are typically deeper than other types of geothermal boreholes. This is because mine water is often located at depths of several hundred meters or more.

Second, mine water geothermal boreholes often need to be drilled through difficult geological formations, such as coal seams and hard rock. This requires specializsed drilling equipment and techniques.

Third, mine water geothermal boreholes need to be completed in a way that prevents contamination of the mine water. This is typically done by installing a steel casing in the borehole and cementing it into place.

Mine water heat - the process explained 

  • Site preparation: The drill site is prepared by clearing the area and leveling the ground.
  • Drilling: The drilling rig is positioned over the drill site and the drill bit is lowered into the ground. The drill bit rotates and cuts through the rock, forming the borehole.
  • Installing the casing: Once the borehole is drilled to the desired depth, a steel casing is lowered into the hole. The casing is cemented into place to prevent contamination of the mine water.
  • Completing the borehole: Once the casing is cemented into place, the borehole is completed by installing a well screen and a pumping system.

The well screen is a perforated pipe that is placed at the bottom of the borehole. It allows water to flow into the borehole while preventing sediment and other debris from entering.

The pumping system is used to extract water from the borehole and deliver it to the geothermal energy system.

Once the borehole is completed, it is tested extensively to ensure that it is functioning properly. The water is also tested to ensure that it meets the quality standards for geothermal energy use.

Obviously this is a very simple overview of what is an extremely complex undertaking.  We have the experience to guide you from consultation through to commissioning the heating and cooling system.  Contact us to discuss your project.

We can help you to unlock the power of geothermal energy and save money on your energy bills.