Use mining byproducts to make sand for construction projects: Coal Ministry report
Overburden (OB), the by product from mining operations, and process it to produce Manufactured-Sand (M-Sand), which can be used in construction projects. This move will reduce dependency on river sand and preventing environmental degradation, a Coal Ministry statement said.
To make this possible, public-sector undertakings (PSUs) have commissioned four OB processing plants and five OB-to-M-sand pilot plants. Additionally, six more OB processing and OB-to-M-sand plants are currently in various stages of installation within the Coal/Lignite PSUs, the statement added.
These plans have been listed in a report by a High-Powered Expert Committee (HPEC) of the Coal Ministry. The report has recommended that coal companies can be mandated to practice mining of other minerals present in OB strata or gainful utilization of OB for economic value rather than mining of just coal.
According to the HPEC report, there is a vast potential for gainful utilisation of overburden from coal mines. The OB may contain valuable building material, armour stone, rare earth, limestone, fire clay, sand, brick clay, kaolin, pegmatite, and basalt among others, that can be used railways and road construction.
Further, Major minerals likely to be obtained from OB will be building material including processed sand and processed OB for landfilling and/or stowing.
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