涌山矿首采层选择及其区域防突技术实践

摘要

选取煤层的突出危险程度、相对当量间距作为首采层的优选指标，对首采层采取穿层钻孔预抽区段煤层瓦斯的区域防突措施，保证了首采层的安全开采，可以为其他类似条件煤与瓦斯突出矿井首采层的开采提供参考。%Selection of outburst risk degree of coal seam ,relative equivalent space as optimization index of first mined seam and region outburst prevention measures of using transformational drilling to pre -drainage gas en-sures the safety mining of first mined seam ,which can provide reference for the mining in first mined seam of other similar collieries .