沿沟煤矿开采保护层区域防突措施效果检验

Effect Test of Outburst Prevention Measures in Mining Protective Seam in Yangou Colliery

七煤31704工作面作为保护层开采,制定切实可行的瓦斯综合治理方案,通过邻近层仰角卸压孔的抽采,水平拦截孔抽放,有效解决瓦斯超限问题,以残余瓦斯含量7 m3/t为临界值对被保护层工作面的保护效果进行区域性检验。

By the depressurized drainage in adjacent seam and horizontal interceptor hole drainage,a practical and feasible gas comprehensive control scheme has been worked out in 31704 face of No.7 Colliery,which effectively solved the problem of gas overrun.With the residual gas content of 7 m^3/t as the critical value,the protective effect of the working surface of the protected layer has been tested regionally.