Numerical Investigation on Potential Influencing Factors Affecting Drainage Effective Radius of Crossing Borehole

Crossing borehole is an effective means to eliminate the outburst risk of coal and gas. The influence inclination angle, diameter, drainage time on radius gas are studied by numerical simulation engineering example verification. study shows that changes in a “U” shape with increase angle. When angle α seam plane decreases, increases. Furthermore, mass around broken shear deformation, which consistent results inner peephole. radiuses different dip X strike Y. small, direction generally wider. large (α ≤ 90°), Y directions close. positively correlated diameter more significantly influenced increasing when small. increases as negative exponential function eventually converges constant. has practical implications for design crossing floor.