Why in News?
Jharia Coalfield is in the news mainly because of its century‑old underground coal fires, recurring land‑subsidence tragedies (people falling into burning pits), and ongoing evacuation and rehabilitation delays for hundreds of thousands living on top of burning mines.
Core Specifications & Geographic Profile
- Location: Situated in the Damodar River valley within the Dhanbad district of Jharkhand.
- Spatial Extent: Spans an area of approximately 280 to 450 square kilometres.
- Reserve Scale: Holds India's largest localized coal reserve, with an estimated 19.4 billion tonnes of premium coking coal.
- Historical Timeline: Commercial extraction began in 1894, while the first instances of spontaneous underground fires were formally recorded at the Bhowrah colliery in 1916.
The Science Behind the Underground Fires
- Spontaneous Combustion: The high-grade coking coal has a low ignition point; when unscientific, historic mining left loose seams exposed to oxygen, a natural oxidation reaction triggered fires that have smouldered for 110 years.
- The "Chimney Effect": As fires consume the underground coal layers, the overlying rock strata lose stability and fracture. This creates deep, vertical "collapse structures" stretching over 100 metres high, which act as chimneys that continuously suck in fresh air and vent toxic plumes (CO2, CH4, SO2, and CO).
- Extinguishment Barriers: The extreme subterranean depths and vast network of interconnected coal seams make it nearly impossible to isolate or completely suffocate the fire sites using traditional sand-blanketing.
Key Features of the Revised Jharia Master Plan
To address structural gaps in the older 2009 framework, the government introduced a modernized, livelihood-centric rehabilitation structure:
- Target Demographics: Mandates the phased rehabilitation of 15,080 families across 81 high-vulnerability locations.
- Livelihood-Centric Shift: Unlike previous models focused solely on land relocation, the revised framework provides families with a ₹1 Lakh direct livelihood grant and ₹3 Lakh credit support to enable a smooth transition into new self-employed vocations.
- Institutional Restructuring: Dictates clear division of labour; the state government's Jharia Rehabilitation and Development Authority (JRDA) resettles non-company families into the Belgaria Rehabilitation Township, while Bharat Coking Coal Limited (BCCL) handles operational mine sites.
- Corporate Backing: Alongside the core government funding, Coal India Limited (CIL) infuses an additional ₹500 crore per year specifically to scale up subterranean fire-extinguishment technologies.
Mitigation Progress & Technical Monitoring
- Reduction of Fire Footprint: Due to targeted excavations and surface sealing, the active surface fire area has successfully shrunk from 3.26 sq km down to 1.53 sq km. Out of 27 high-priority fire locations originally mapped, 17 have been completely neutralized.
- Advanced Remote Sensing: Law enforcement and public mining bodies are shifting from manual borehole checking to Sentinel-1 Synthetic Aperture Radar (SAR) satellite data and IoT-based thermal sensor arrays to map land subsidence and subsurface heat movements in real time.
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