Coal India’s arm SECL has signed a Rs 7,040 crore agreement with TMC Mineral Resources to start large-scale coal production using paste-filling technology in the Singhali underground mine in Korba.

Paste filling is a modern method where extracted coal voids are filled with a paste made of fly ash, crushed overburden, cement, water, and binding chemicals. This eliminates the need for surface land acquisition, prevents land subsidence, and ensures mine stability.

With this move, SECL becomes the first coal PSU in India to adopt this underground mining technique. The project will run for 25 years and produce about 8.4 million tonnes of coal.

The Singhali mine, operational since 1993, was originally approved for 0.24 million tonnes of annual output and currently has 8.45 million tonnes of extractable non-coking coal reserves. Due to dense surface infrastructure like villages, power lines, and roads, traditional caving methods aren’t viable here.

By using paste filling, mining can continue safely without affecting the surface, and this model could be applied to similar mines facing land constraints.

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