Evolution Model of Gas Pressure Around Coal Seam Boreholes and Determination of the Effective Drainage Radius
The effective drainage radius is a key parameter for borehole layout and gas drainage performance evaluation, and it is determined by the spatiotemporal evolution of gas pressure around drainage boreholes. Taking the M4–5 coal seam of a Xinjiang coal mine as the study case, the residual gas-content criterion was conver...