含瓦斯煤带压解吸规律的实验研究

为获得含瓦斯煤带压解吸规律,提高瓦斯抽采效率,对含瓦斯煤的带压与常压条件下的解吸过程进行实验研究。研究表明：瓦斯抽采过程中含瓦斯煤中的瓦斯属于带压解吸,带压瓦斯的解吸量和解吸速度均小于常压下的瓦斯解吸量和解吸速度,带压解吸条件下的解吸终止时间明显滞后于常压下的解吸终止时间。评价含瓦斯煤中瓦斯的可采性和确定瓦斯抽采终止时间时应以带压解吸指标作为衡量指标。该研究对瓦斯资源抽采具有一定的指导意义。

Experimental study on gas pressure desorption law governing coal containing gas

This paper seeks to obtain the desorption law of coal containing gas and increase the efficiency of gas extraction by experimental study under pressure and gas desorption process under atmospheric pressure.The results show that： Gas desorption of coal containing gas belongs to pressure desorption during gas extraction process,the gas under pressure gives smaller desorption volume and lower desorption rate than does the gas under atmospheric pressure,and gives a significantly delayed desorption termination than the gas under atmospheric pressure.It follows that the evaluation of extraction admissibility of gas-containing coal and the determination of the termination time of gas extraction are determined by the desorption index under pressure as a measure index.The study is of value for guiding field extraction of gas resources.