煤巷卸压带宽度考察研究

Study on the Width of Pressure Relief Zone in Coal Roadway

为准确考察煤巷卸压带宽度,指导矿井合理布置巷道,在分析不同变质煤体巷道卸压范围随时间变化规律的基础上,采取瓦斯参数法、钻孔应力法在14030上顺槽开展现场考察。结果表明:焦作矿区高变质煤层巷道极限卸压带宽度出现在巷道煤壁暴露1年以上,综合考察确定矿井二_(1)煤层巷道卸压带宽度为15 m。

In order to accurately investigate the width of the pressure relief zone of coal roadway and guide the rational layout of roadway in the mine,based on the analysis of the variation law of the pressure relief range of roadway with different metamorphic coal bodies with time,the gas parameter method and borehole stress method were adopted to carry out on-site investigation along the channel on 14030.The results show that the width of the ultimate pressure relief zone of the roadway in the high metamorphic coal seam in Jiaozuo mining area occurs when the roadway wall is exposed for more than one year.The comprehensive investigation determines that the width of roadway pressure relief zone in coal seam Ⅱ 1 is 15 m.