摘要
Abstract
Through the improved coal sample gas desorption device, the constant temperature gas desorption quantity and desorption velocity data of tectonic coal and primary coal under different equilibrium pressure are accurately measured, and the gas desorption characteristics of tectonic coal are analyzed. The experimental results show that the gas desorption curve of tectonic coal has obvious sectional characteristics compared with that of the primary structural coal. In the first 1 minute, the gas desorption amount of tectonic coal can reach 31.55% to 38.07% of the total desorption amount in 120 minutes, which is much higher than that of the primary coal under the same condition (10.94% to 14.24%). The initial desorption of tectonic coal can reach 10.11 mL/(g·min)to 15.75 mL/(g·min), which is 1.72 to 2.32 times faster than primary structural coal. Therefore, the initial desorption characteristics of tectonic coal are mainly controlled by the desorption characteristics in the first 1 minute. The relationship between the desorption index of drill cuttings K1 and the average thickness of tectonic coal is analyzed, and the relationship between them is linear and significantly positive, indicating that the risk of coal and gas outburst increases significantly in the area where tectonic coal is developed.关键词
构造煤/瓦斯解吸/钻屑瓦斯解吸指标/煤与瓦斯突出/不同平衡压力Key words
tectonic coal/gas desorption/gas desorption index of drill cuttings/coal and gas outburst/different equilibrium pressure分类
矿业与冶金
