Abstract
The solid‐gas coupling model for mining coal‐rock mass deformation and pressure relief gas flow in protection layer mining is the key to determine deformation of coal‐rock mass and migration law of pressure relief gas of protection layer mining in outburst coal seams. Based on the physical coupling process between coal‐rock mass deformation and pressure‐relief gas migration, the coupling variable of mining coal‐rock mass, a part of governing equations of gas seepage field and deformation field in mining coal‐rock mass, is introduced. Then, a new solid‐gas coupling mathematical model reflecting the coupling effects of gas adsorption/desorption, gas pressure, and coal‐rock mass deformation on the mining coal‐rock mass deformation and pressure relief gas flow is established combined with the corresponding definite conditions. It lays a theoretical foundation for the numerical calculation of the deformation of mining coal‐rock mass and the migration law of gas under pressure relief in the outburst coal seam group.
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