高瓦斯油气共生易自燃厚煤层巷道松动圈范围的确定

Methods to Define Laneways Loose Zone of Tick Coal Seam with Enriched Gas and Spontaneous Combustion

研究了铜川矿务局下石节煤矿高瓦斯油气共生易自燃厚煤层巷道松动圈的范围,确定合理封孔长度。在进行本煤层采后卸压抽放时,抽放钻孔的封孔深度是保证在抽放负压的影响下,钻孔不漏气,提高抽放浓度的关键因素之一,因此,确定巷道松动圈的范围对提高瓦斯抽放效果具有重要意义。

Methods to define the laneways loose zone of thick coal seam with enriched gas and spontaneous combustion is studied in the article and define the rational the length of sealed borehole. Using gas drainage in pressure - releasing zone, the length of sealed borehole is one of the key factors to ensure no entrance for air around the borehole and increase the thickness of drained gas under the influence of drainage negative Stress. Therefore, to define the laneways loose zone is very significant to gas drainage.