Engineering
3 years ago

New Study Reveals Key to Preventing Spontaneous Combustion in Coal Mines

Geofluids
Optimization of Barrier Pillar Design in Longwall Mining with Top Coal Caving in Spontaneous Combustion Coal Seam
Qiang Fu, Ke Yang, Qinjie Liu, Shuai Liu, Xiang He, Xin Lyu

Paper Summary

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The scientists studied how to design barrier pillars in coal mines to prevent spontaneous combustion. They analyzed rock collapse and stress changes in the pillars, and found that pillar stability depends on factors like rock density and coal seam angle. By measuring pressure in the mine, they determined the optimal pillar width to be 7 meters. Monitoring showed normal gas levels during mining, indicating successful prevention of combustion. This research can help design safer barrier pillars in similar mines.