"The IMG has recently recommended deallocation of 11 coal blocks of companies like JSPL and Monnet Ispat & Energy Ltd," a source said.
"In the case of another 19 mines, the IMG has recommended either imposition or deduction of bank guarantee," the source added.
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Coal blocks which were recommended for deallocation include Ramchandi Promotional block allotted to JSPL, the source said.
These coal blocks were earlier issued show cause notices for delaying production.
Last month, the Coal Ministry asked the coal block allottees to make presentation before the IMG on achievement of milestones and reasons for delays.
The firms which were asked to make presentation include, SAIL, NTPC, JSPL, Tata Power and Monnet Ispat and Energy Ltd.
Jindal Steel and Power Ltd (JSPL) was asked to make presentation with regard to delaying production from its four coal blocks -- Amarkunda Murgadangal in Jharkhand, Utkal B1 and Ramchandi Promotional block in Odisha and Urtan North in Madhya Pradesh.
SAIL was asked to make presentation for Sitanala mine in Jharkhand, and NTPC for Parki Barwadih mine in Jharkhand and Talaipalli mine in Chhattisgarh.
The government had formed the IMG last year to review the progress of coal blocks allocated to firms for captive use and recommend action, including de-allocation.
The panel under the chairmanship of Additional Secretary in the Coal Ministry has members from other ministries, including steel and power.