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在分析回采工作面瓦斯治理方法优劣的基础上 ,提出了老塘留管抽放是治理土城矿回风巷瓦斯超限、上隅角瓦斯积聚的一种比较理想的方法。并对老塘留管抽放的原理、方法及应用情况进行了详细的阐述。
Based on the analysis of the merits and demerits of the gas treatment methods in the coal mining face, it is put forward that Laotang pipe drainage is an ideal method to control the gas over return airway and the gas accumulation in the upper corner of Tucheng mine. The principle, method and application of drainage in Laotang are described in detail.