FIELD: mining. SUBSTANCE: method for degassing coal seam includes drilling of degassing holes in worked mass from mine working, and releasing-degassing cracks-slots are made in holes. Degassing holes are drilled in places with high pressures Pп/Pп>pH,, where p is average specific densities of rocks above mass, H is depth of coal mass occurrence. Cracks-slots are made by shaking of coal mass from hole in vertical direction. EFFECT: higher efficiency.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SEAM-WISE METHANE DRAINAGE | 0 |
|
SU1629566A1 |
| METHOD OF DEGASSING COAL SEAMS | 0 |
|
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|
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|
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