The influential factors of calculation error for groundwater table are discussed by using the iteration method to find solution of numerical model in the mine drainage forecast of deep drawdown.

This paper expounds the present situation of discharged water from coal mine,probes into the classification and treatment methods,and illustrates the importance of the reuse of discharged water from coal mine with practical case.

In order to improve the efficiency of mine pump selection and realize resource share,invokes the component compiled by visual basic using ASP technology,performance graph is generated dynamically in Web and mine pump selection based on Web is realized.