Mine Dewatering

Mine Dewatering

Existing pump technologies are being applied in innovative new ways in an attempt to dramatically reduce the long and short term costs of dewatering mines.

The pump industry has been experiencing an increase in the demand for dewatering pump technologies, as low commodity prices have convinced mining houses to exploit the reserves of marginal mines.

A large number of existing mines are being refurbished, and the dewatering of these mines is playing an integral part in the reconstruction process of those marginal mining activities. Submersible turbine pumps have emerged as a viable, cost-effective alternative to a dewatering application.

Traditionally, pumping stations were built underground near flooded areas of the mine. These required flameproof motors that were flooded every time there was a heavy rainfall. The identification of heavy-duty submersible pumps to dewater mines as an alternative to the former pumping stations, has become a reality and is a viable option for mining houses.

These submersible dewatering pumping systems are easy to install and are considerably more cost-effective as the need to build pumping stations underground is totally eliminated. As the pumps are submerged, there is no requirement for a flameproof system resulting in further cost savings. This system also provides access to areas that were previously inaccessible and which can now be mined as soon as all the water has been pumped out.

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Used in conjunction with Boreline®, this system is further enhanced by eliminating the need to transport and install cumbersome steel pipe. Boreline® is available in continuous lengths and rolls flat. The result is that a 200m (660ft) length can simply be transported in the back of a pick-up truck.

The quality of mine water varies considerably between mines, however, due to the aggressive properties of the water and extreme pH levels, pumps and pipes need to be constructed of corrosive resistant materials. Boreline® is ideal in these situations as the product is corrosion resistant even at extreme pH levels.

Users benefit when dewatering with submersible pumps and Boreline® as this eliminates the need for construction teams to build pumping stations at every dewatering point. Boreline® also results in less maintenance costs over the life of the product, less heavy equipment to install and retrieve and a lower stockholding of pumps and pipes for the mines.

Due to the easy transportability of this dewatering system, mines have responded by utilising emergency stand-by rigs that can be deployed to an area for immediate pumping. Response time is greatly reduced as any length can be installed within minutes.

As pressure continues to increase on input costs and efficiencies, mines are open to innovative ideas and technologies that will keep these operating costs under control in the long term.