There is a hydraulic connection between coal seams and surrounding aquifers. Drilling that connects to an aquifer may cause water inrush.water well drilling rig
- When coal seams lie below an aquifer with insufficient aquitard thickness, mining disturbances can damage aquitard integrity, letting aquifer water flow into coal mine roadways or boreholes.
Before operation:
2. Analyze the hydraulic connection between coal seams and aquifers through hydrogeological surveys to assess water inrush risks.
3. Use geophysical exploration to detect aquifer location and water abundance, taking advance measures like drainage depressurization or grouting reinforcement.
During drilling:
4.
Closely monitor water level and pressure changes.
Evacuate personnel and activate emergency plans immediately upon anomalies to prevent water inrush.water well drilling rig
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