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为确定负压排渣定点取样过程的瓦斯损失量,采用自主研发的颗粒煤瓦斯负压-负压转常压解吸实验系统,选取义马矿区新安煤矿煤样,开展了不同吸附平衡压力、不同解吸负压及解吸时间的颗粒煤瓦斯负压-负压转常压解吸规律实验研究.结果表明:负压解吸段瓦斯累积解吸量随着解吸负压(绝对值)的升高及负压解吸时间的延长而增大,转为常压解吸后对应的瓦斯累积解吸量减小;实验煤样负压解吸初期(0~2min)瓦斯解吸规律及转为常压解吸后的常压解吸初期规律(0~10min)均可采用巴雷尔模型描述;基于提出的负压取样瓦斯损失量推算方法所得的推算值与实际损失量值最大误差为4.83%.
In order to determine the gas loss during the fixed-point sampling of negative pressure slagging, the self-developed granular coal gas negative pressure-negative pressure to atmospheric pressure desorption experimental system was used to select the coal samples from Xin’an coal mine in Yima Mining Area. Different adsorption equilibrium pressures Desorption negative pressure and desorption time of granular coal gas from negative pressure to negative pressure to atmospheric pressure desorption law experimental results show that: negative pressure desorption gas desorption amount of desorption with desorption negative pressure (absolute value) and negative pressure desorption The desorption of gas cumulative desorption after atmospheric pressure desorption decreases; the gas desorption law in the initial stage of negative pressure desorption (0 ~ 2min) and the initial law of atmospheric desorption after atmospheric pressure desorption (0 ~ 10min) can be described by Barrell model. The maximum error between estimated value and actual loss value based on the proposed gas loss estimation method of negative pressure sampling is 4.83%.