Disclosed is a networked preferential gas migration passage (17) construction and gas diversion drainage method, applicable to active construction of a networked fracture passage inside a ceiling (13) where a hard ceiling (14) covers a coal seam (8), and gas (16) diversion governance. Prior to an advance stress change area, a fracture generating hole (4), a fracture guided development hole (5), a lateral break hole (3) and a fracture communicating hole (6) are respectively implemented in the hard ceiling (14) in tunnels on two sides of a working face (7), an artificially guided fracture (15) is actively constructed and formed inside the hard ceiling (14), under the action of the mining force, the artificially guided fracture (15) interweaves and communicates with a mined fracture to form a networked preferential gas migration passage (17), while the artificially guided fracture drill hole accelerates the breaking of the ceiling (13) to form a ceiling break separated strata fracture region (19), the gas (16) timely and highly efficiently flows and migrates along the networked fracture passage, forming enrichment in the ceiling break separated strata fracture region (19), and the artificially guided fracture drill hole provides reference for the implementation position of the gas diversion drainage drill hole (11) of the ceiling (13), such that the diversion governance of the stope gas (16) is more centralised and highly efficient.
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