Investigate the relationship between mining activities and the occurrence of earthquakes. Explain how…

Question

Investigate the relationship between mining activities and the occurrence of earthquakes. Explain how mining operations can be regulated to minimize seismic risks.

Ghissu Editorial · Accepted Answer

Mining can induce earthquakes by redistributing crustal stress, blasting, subsidence that reactivates faults, and groundwater changes that alter pore pressure, much like the reservoir-triggered 1967 Koyna quake. It can be regulated through cluster-based impact assessment under the EIA Amendment 2016, lease limits, seismic monitoring and curbs on illegal mining.

**Introduction**

Mining-induced seismicity is a growing concern in India, with 159 earthquakes recorded recently, highlighting the need for effective regulation to safeguard communities and infrastructure.

**Causal and Correlative Links**

1. **Anthropogenic Seismicity Evidence**: Deep underground mining and blasting correlate with increased seismic events, as seen in coal and mineral mining regions.  
2. **Regional Mining Clusters**: Simultaneous mining leases cumulatively alter subsurface stress; ==Andhra Pradesh’s Rayalaseema belt== exemplifies localized seismic disturbances requiring state-specific regulation.

**Mechanisms of Influence**

3. **Stress Redistribution**: Extraction causes stress shifts in the crust, triggering fault slippage and earthquakes.  
4. **Water Table Alterations**: Mining-induced groundwater changes reduce fault friction, facilitating seismic activity.

**Regulatory Frameworks**

5. **Cluster-Based EIAs**: The 2016 EIA Amendment mandates cumulative impact assessments for mining clusters to cap leases and reduce seismic hazards.  
6. **Licensing and Monitoring**: The Mines and Minerals Act limits lease size; ==Andhra Pradesh’s Directorate of Mines and Geology== enforces these to regulate mining intensity.  
7. **Technological Collaboration**: MoU between India’s DGMS and Queensland’s SIMTARS promotes risk-based safety management adaptable to ==Andhra Pradesh==.

**Way Forward**

8. **Enhanced Seismic Monitoring**: Establish seismic observatories in mining zones of ==Andhra Pradesh== for real-time tremor detection.  
9. **Integrated Planning**: Cluster-based lease approvals with community input balance economic and seismic safety.  
10. **Legal Enforcement**: Single-window approvals and strict penalties curb illegal mining and unregulated seismic risks.

**Conclusion**

Effective regulation combining cluster assessments, monitoring, and sustainable practices is essential to mitigate mining-induced earthquakes in ==Andhra Pradesh== and beyond.

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