Research of Numerical Simulation of Process of Mine Gas Pre-draining by Pinnate Boring

Reasonable gas drainage is an important method to solve gas disaster.On the basis of analyzing mechanism of gas drainage process of coal seam,mathematical models of the process of gas pre-draining by pinnate boring were set up and the models were drawn by numerical discretization.Meanwhile,the nonlinear equations were changed into linear equations by use of Newton-Raphson numeric algorithm.The process of mine gas pre-draining by pinnate boring was simulated with VB6.0 codes.By validation of practical data of mine gas drainage,the numerical simulation result reflected real gas drainage situation basically,which will lay a foundation for a further research on parameters optimization of mine gas drainage.