1380 2. METHODOLOGY AND CASE STUDY FRAMEWORK The study adopts a qualitative case-study methodology drawing on operational records, sustainability disclosures, regulatory compliance data, and implementation outcomes across mining, power, and renewable energy operations. The analysis integrates technical, environmental, social, and governance dimensions and benchmarks observed practices against internationally recognised frameworks, including the International Council on Mining and Metals (ICMM) Mining Principles, OECD circular economy models, and global post-mining land-use transition practices. The objective is to assess effectiveness, scalability, and replicability of an ESG-integrated transition model implemented within a public sector enterprise context. 3. OPERATIONAL CONTEXT: FROM LIGNITE LEGACY TO DIVERSIFIED MINERAL PORTFOLIO NLCIL’s operational base originates in large-scale lignite mining at Neyveli (Tamil Nadu) and Barsingsar (Rajasthan), historically linked to pithead thermal power generation. Building on this legacy, the company has diversified into coal mining through allocated coal blocks, strengthening national fuel security. In parallel, NLCIL has entered the critical minerals domain, recognising their strategic importance for renewable energy systems, electric mobility, and advanced manufacturing. This diversified portfolio enables a unified ESG and mine-planning philosophy across mineral typologies, supporting organisational resilience and long-term relevance. Figure 1. NLCIL Group Overview Figure 2. NLCIL’s National Presence 4. SUSTAINABLE MINING AND SAFETY PRACTICES NLCIL deploys continuous mining systems using Bucket Wheel Excavator–Conveyor–Spreader (BWE–CS) technology a zero-emission technology, consistent with global best practices in large lignite operations. Advanced geological exploration, GIS-based modelling, drone surveys, and digital mine planning reduce uncertainty and improve resource recovery. Safety is embedded as a core operational value through Behaviour-Based Safety programmes, simulator-based operator training, proximity warning systems, automated fire detection and suppression, and app based alert systems aligned with DGMS regulations and international benchmarks. 5. PROGRESSIVE MINE CLOSURE AND CREATION OF SELF-SUSTAINING ECOSYSTEMS Progressive mine closure is integrated at the planning stage and implemented through a structured framework encompassing physical stabilisation, chemical soil and water conditioning, and biological
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