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针对传统抽采半径测定方法难度大、成本高的问题,提出了一种基于钻孔瓦斯涌出衰减特征结合数值模拟验证的新方法。将钻孔的瓦斯涌出过程分为前段和后段,回归分析后段钻孔瓦斯涌出规律,比较后段钻孔瓦斯流量衰减系数及百米钻孔瓦斯极限排放量,最后结合COMSOL数值模拟软件进行验证。
Aiming at the difficulty of high difficulty and high cost of traditional extraction radius measurement method, a new method of numerical simulation and verification based on gas emission attenuation of borehole is proposed. The gas emission process of the borehole is divided into the front and back sections, and the gas emission law of the borehole in the back section of the backhole section is analyzed by regression analysis. The gas flow attenuation coefficient of the borehole section and the gas emission limit of the 100-meter borehole are compared. Finally, COMSOL numerical simulation Software to verify.