丰城矿区排放钻孔有效影响半径确定

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

为了解决丰城矿区局部综合防止煤与瓦斯突出措施排放钻孔布置的问题,采用数值模拟方法对钻孔瓦斯排放半径进行分析,对排放钻孔周围应力及瓦斯流动进行研究,同时对该排放半径进行了现场考察.研究结果表明:该矿区瓦斯排放一天,其有效影响半径为0.5 m.该结论为矿井采取局部防止煤与瓦斯突出措施提供了合理的参数和重要的参考依据.

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.