coldsuch

Coldsuch is a type of underground coal mine ventilation system used in deep coal mines. It was invented by David Fellows, a British coal miner, in the mid-20th century. The system is also known as the Fellows system.

Coldsuch consists of a network of ventilation shafts and tunnels that provide a supply of fresh air to the working areas of the mine. The system also removes stale air and noxious gases, such as methane and carbon monoxide. Coldsuch is designed to supply air at a lower temperature than the surrounding rock, which can be beneficial in hot mines.

The system operates at low pressures, typically between 200 and 400 pascals. The air distribution network is usually made up of a series of steel ducts and brick-lined tunnels. The air flow rate and temperature are controlled by regulators and dampers.

The use of coldsuch in coal mines has been shown to reduce the risk of explosions and improve working conditions. However, it requires careful installation, maintenance and operation to ensure its effectiveness.

Coldsuch systems have been installed in coal mines around the world, including in the United States, the United Kingdom, Australia and South Africa. While it has been superseded by more modern ventilation systems in some mines, it remains in use in many older mines.

Overall, coldsuch is a significant innovation in coal mine ventilation technology, providing a safe and efficient means of supplying fresh air to deep coal mines. Its benefits have made it a valuable contribution to the safety and productivity of coal mining operations.