【摘要】 通过对芙蓉煤矿下平硐B3+4煤层中央盘区的瓦斯压力P、煤层透气性系数λ0、煤的普氏系数f和1m钻孔体积内的煤粉重量S1测试,采用理论分析得出钻孔瓦斯解吸指标K1、钻孔瓦斯涌出初速度q、钻屑量S的临界值。根据现场检验结果表明采用理论方法确定的临界值能有效地判断突出危险性。更多还原

【Abstract】 With the site test and measurement on gas pressure P, seam gas permeability coefficient λ₀, coal consistency coefficient f and coal powder weight S₁ from a one meter borehole conducted in B₃₊₄ seam at the central mining district of a drift of Furong Mine and with the theoretic analysis, a gas desorption index K₁ of the borehole, gas emission initial velocity q of the borehole and the critical value of drilling cuttings weight S were obtained. The site test and measurement results showed that the critical value set by the theoretic method could efficiently judge the outburst danger.更多还原