Determination of effective influence radius of drainage boreholes in Fengcheng mining area

In order to solve the problems associated with boreholes layout for coal and gas outburst prevention in Fengcheng mining area,this study analyzed the drainage radius of drainage boreholes using numerical simulation method.In addition,the study investigated the characteristics of stress and gas flow around the drainage boreholes,and examined the drainage radius on site.Therefore,the effective influence radius of drainage borehole was determined for this mining area.Also,the rational parameters were provided for preventing local coal and gas outburst in the mining area.