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针对一些地区煤矿瓦斯赋存浓度高,不能采用外加电磁场的方式促进瓦斯的解吸问题.利用自制的低频激励瓦斯解吸及测量装置,设置了3组实验,通过测量不同情况下煤样罐中瓦斯的解吸量,研究低频振动和声波(统称为低频激励)对瓦斯解吸的综合影响.结果表明:低频激励条件下瓦斯解吸量是自然条件下的2倍左右,施加频率为70~120 Hz,激励的煤样罐比其他煤样罐中每100 g煤样剩余瓦斯量少.试验结果证明了低频激励可以加快瓦斯解吸速率,加深瓦斯解吸程度.激励的频率在70~120 Hz变化时,由于达到了瓦斯附着的本振频率而使瓦斯解吸程度加深.另外试验还间接证明了声波对瓦斯解吸有积极的作用.
In view of the high concentration of gas in some coal mines, the desorption of gas can not be promoted by the application of an external electromagnetic field.Three sets of experiments were carried out by self-made low frequency excitation gas desorption and measuring device. By measuring the gas Desorption amount and the synergistic effect of low frequency vibration and acoustic wave (collectively referred to as low frequency excitation) on gas desorption were studied.The results show that the desorption amount of gas under low frequency excitation is about 2 times under natural conditions and the applied frequency is 70 ~ 120 Hz, The coal sample tank has less residual gas per 100 g of coal sample than other coal sample tanks.The experimental results show that the low-frequency excitation can speed up the gas desorption rate and the degree of gas desorption.When the excitation frequency changes from 70 to 120 Hz, Gas attached to the local oscillator frequency and gas desorption degree deepened.Another test also indirectly proves that sound waves have a positive effect on gas desorption.