In order to solve coal and gas outbursts during mining coal seam, studying on related problems were carried out. According to the theories of mining upper protective layer, proper mining plan were designed and performed through field experiment. By means of examining several parameters obtained from the field experiment, the protective effects were evaluated and the protective scope and related parameters were determined. The results of field experiment show that the danger of outbursts was evidently eliminated and the method of mining protective layers is effective and the safety and economic benefits are remarkable. The research has really applied worth and will give beneficial references to mining area with analogous conditions.