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为研究水分对煤层瓦斯流动的影响规律,以焦作矿区赵固矿原煤为实验对象,利用热流固耦合实验系统完成了不同气体压力条件下含水率分别为0.9%、1.5%、2.2%、3.3%的受载原煤瓦斯解吸实验。实验结果表明:当含水率小于3.3%时,受载原煤100 min累计瓦斯解吸量随水分增加呈线性减小趋势;受载原煤水分增加时解吸速度指数、1 min时刻的瓦斯解吸速度均有减小趋势;当煤层中水分减小时,瓦斯解吸速度衰减的趋势减缓,瓦斯解吸更加平稳,使得工作面煤与瓦斯突出可能性减小。
In order to study the influence of moisture on the gas flow in coal seam, taking the raw coal from Zhao Gu mine in Jiaozuo mine as an example, the experiments were carried out under the conditions of different gas pressures with 0.9%, 1.5%, 2.2% and 3.3% Of the raw coal gas desorption experiments. The experimental results show that when the moisture content is less than 3.3%, the accumulated gas desorption amount of loaded raw coal decreases linearly with the increase of moisture content. The desorption velocity index increases with the increase of raw coal moisture, and the gas desorption velocity at 1 min decreases Small trend; when the water in coal seam decreases, the tendency of gas desorption speed decays slowly and the gas desorption smoothes steadily, making the possibility of coal and gas outburst in working face decreasing.