the Flat Surface Path to Flow the Assurance of Noting the Water Craft Parameter

The coal seam water infusion is a technique that can drive the gas out of the coal seam.According to the basic principle of hydrodynamics and the seepage mechanics with pores,the experimental model is established and the analytic solution about the topping up time is deduced.Then on the basis of many experimental data,the paper fits a response curve which is decided by the boundary condition.At last the relations of the effusion time,the effusion radius and pressure intensity is found,which bring important reference to water injection into coal seam.