Context: A deadly explosion at an illegal rat-hole coal mine in Thangkso, East Jaintia Hills (Meghalaya) killed 27 workers, once again exposing the continued prevalence of this hazardous practice despite a National Green Tribunal (NGT) ban imposed in 2014 and reiterated in 2015. The incident has triggered renewed enforcement and judicial scrutiny.
What is Rat-Hole Mining?
Rat-hole mining is a primitive and unsafe coal extraction method involving narrow pits and tunnels—often up to 300–400 feet deep—dug manually using pickaxes, shovels, and baskets. It is mainly practised in Meghalaya, with sporadic instances in Assam, to extract coal from thin seams.
Types
- Side-Cutting: Horizontal tunnels dug into hill slopes.
- Box-Cutting: Vertical pits followed by horizontal galleries to reach coal seams.
Why Does It Persist Despite the Ban?
- Economic Compulsion: Daily wages of ₹800–1,200, far higher than average MGNREGA wages (~₹250/day), attract vulnerable workers.
- Geological Constraint: Over 90% of coal seams are thinner than 2 metres, making mechanised mining economically unviable.
- Weak Enforcement: Between 2014–2018, Meghalaya Police recorded 477 violations of the NGT ban, indicating low deterrence.
- Political–Bureaucratic Nexus: Despite prohibition, illegal coal trade continued; coal exports worth ₹700+ crore annually (pre-2019) point to systemic regulatory capture.
- Migrant Labour Dependence: In major accidents, 60–70% of victims were migrants from Jharkhand, Assam, and neighbouring regions, driven by distress employment.
Environmental and Human Costs
- Fatal Accidents: Frequent cave-ins, flooding, and explosions.
- Water Pollution: Acid mine drainage contaminates rivers, affecting agriculture and drinking water.
- Ecological Damage: Deforestation, land subsidence, and biodiversity loss.
- Human Rights Concerns: Exploitative labour conditions, absence of safety gear, and lack of legal protection.
Measures Taken to Curb the Practice
- Criminal Enforcement: FIRs under culpable homicide, MMDR Act, and Explosive Substances Act; arrests of mine owners and operators.
- Judicial Oversight: Meghalaya High Court took suo motu cognisance and appointed the Justice (Retd.) B.P. Katakey Committee (2022) to monitor illegal mining.
- Judicial Prohibition: NGT’s 2014 ban (upheld by the Supreme Court) declared rat-hole mining unscientific, unsafe, and environmentally destructive.
Way Forward
- Alternative Livelihoods: Expand skill training, MSME support, and public works to reduce economic dependence.
- Scientific Mining Framework: If mining is permitted, enforce regulated, mechanised, and environmentally compliant methods.
- Stronger Enforcement: Dedicated mining police units, real-time surveillance, and faster prosecutions.
- Labour Protection: Inter-state coordination to protect migrant workers and curb trafficking.