深井中厚煤层突出预测敏感指标临界值研究

＂突出＂已成为我国煤矿安全生产的主要隐患之一,＂突出＂防治成为矿井安全工作的重中之重。采掘工作面突出危险性预测预报敏感指标的确定是矿井综合防突体系中重要的环节,为了有效预测及防治深部矿井工作面采掘过程中煤与瓦斯突出事故,采用理论分析、实验室分析和现场试验相结合的多种研究手段,获得了试验区13-1煤层突出预测敏感指标及其临界值,S0=6.0 kg/m,q〈4.0 L/m in.m,无突出危险;q≥8.0 L/m in.m,有突出危险;{4.0≤q〈8.0 L/m in.m}∩{Cq〉0.65}无突出危险;{4.0≤q〈8.0 L/m in.m}∩{Cq≤0.65}有突出危险。结果表明,确定的指标及其临界值合理有效,指导试验区安全掘进6 000m,并得到有效推广应用,技术经济效益显著。

Study on Critical Value of Forecast Sensitive Index for Coal and Gas Outburst in Middle Thick Coal Seams in Deep Mines

Coal and gas outburst is one of major hazards to safety production in Chinese coal mines.Outburst control becomes top on top work in coal mine safety.Determination of sensitive index for outburst forecast in working faces is an important element of outburst comprehensive prevention system in coal mines.In order to effectively predict and prevent coal and gas outburst accidents in deep mines,based on various research methods,including theoretical analysis,laboratory analysis and field test,coal seam 13-1 was studied and critical value of sensitive index for outburst prediction in the coal seam was obtained as following： no outburst threat,when S0=6.0 kg/m,q4.0 L/min·m;existence of outburst threat,when q≥8.0 L/min·m;no outburst threat,when{4.0≤q8.0 L/min·m}∩{Cq0.65};existence of outburst threat,when 4.0≤q8.0 L/min·m}∩{Cq≤0.65}.The results showed that the determined indexes and their critical values are reasonable and effective.Based on their guidance,safe excavation of roadway in length of 6 000 m was realized.Their effective extension and application obtained remarkable technical and economic benefits.