the recommendations of a government-commissioned study by global consulting firm Deloitte, said media reports.
Around 70 percent of the country's total installed power capacity of 250,000 MW is generated using coal as fuel.
The shortages in the supply of coal also have a direct political impact as millions of people in India are without power, and blackouts are a common phenomenon. Coal shortages are also slowing down industrial activity in the country.
CIL and its seven subsidiaries produce about 80 percent of India's coal output at 450 million tonnes.
But the Maharatna PSU has repeatedly failed to meet production targets, leading to heavy dependence on imported coal.
The restructuring exercise seeks to increase India's coal production manifold and reduce dependence on imports. India imported 142 million tonnes of coal worth $16 billion in 2013-14.
Of the three options proposed by Deloitte, the option to convert CIL's seven subsidiaries into independent companies is under active consideration of the ministry of coal.
"Options under consideration include creating of independent mega regional companies out of CIL, which will cease to be the holding company of the coal producing firms," a media report quoted a government official as saying.
"Each redesigned entity will have a production capacity of range between 70 and 160 million tonnes per annum at the initial level and migrate towards 200-300 million tonnes within 5 to 7 years, creating mega (regional) CIL's."
Coal and power minister Piyush Goyal had earlier said that a draft report submitted by Deloitte on "possible restructuring options" was "under consideration".
Under another option, Deloitte has recommended phased creation of independent entities with continuation of holding company during transition. This option calls for a more gradual transition.
"This option calls for creating entities with production base of 80-100 MTPA that will be progressively carved out of existing CIL structure and made fully independent entities," the official revealed.
For instance, CIL's subsidiaries — MCL, NCL and SECL - may be taken up in the first phase, while the remaining four subsidiaries will continue to be held by CIL as the incubator. MCL and SCCL own close to 47% of the total reserves of CIL.
"One of the major reasons for the inefficiency of CIL is its huge size and monopolistic position. It is high time that we restructure this company," said a former coal secretary.
"The process of restructuring CIL needs to be pushed through swiftly to boost coal production," said the Economic Survey report presented in July and after the Modi-led BJP government came to power.
Another option calls for carrying out internal changes in structure, system and roles to reform the holding company and its subsidiaries. Under this option CIL will continue to operate in its current form but with certain organisational changes.
This restructuring alternative focuses more on empowerment in the current structure.
The Indian coal industry is the third-largest in the world behind only US and China.