孟津煤矿二_(1)煤层突出预测敏感指标确定

Sensitive Index Determination for Outburst Prediction of Ⅱ-1 Coal Seam in Mengjin Mine

准确预测煤与瓦斯突出对煤矿安全生产尤为重要,针对国内外预测敏感指标的确定大部分仅根据试验模拟,缺少现场基础的研究现状。本文采用实验室测定和现场考察相结合的方式,同时考虑瓦斯地质等因素,通过试验研究、跟踪考察及综合分析,确定孟津煤矿二_(1)煤层突出预测敏感指标为钻屑解吸指标h_(2)和钻屑量指标S;而另一钻屑解吸指标K_(1)和钻孔瓦斯涌出初速度q敏感性不明显,故将h_(2)和S作为该矿二_(1)煤层预测指标能够满足安全生产需要,有效解决敏感指标相互交叉的问题,提高其适应性,并取得了良好的经济和社会效益。

It is important to accurately predict the coal and gas outburst for safety production in coal mines.Most of the determination of sensitive prediction indicators at home and abroad is based on experimental simulations,lacking on-site research.This article combines laboratory measurements with on-site inspections and takes gas geology into consideration.Through experimental research,follow-up investigation,and comprehensive analysis,the sensitive indicators for predicting the outburst of the Ⅱ-1 coal seam in Mengjin Coal Mine are determined as the drilling cuttings gas desorption index h_(2) and the drilling cuttings gas volume index S.However,the sensitivity of the gas desorption index K_(1) and the initial velocity q of drilling gas emission is not obvious.Therefore,taking h_(2) and S as the predictive indicators of Ⅱ-1 coal seam can meet the safe production,effectively solve the intersecting of the sensitive indicators,improve its adaptability,and achieve good economic and social benefits.