煤岩吸附量–变形–渗透系数同时测量方法研究

 近年来，随着人们对CO2煤层封存、煤层气注气开采等技术关注程度的不断提高，大量学者开始煤岩吸附量、变形以及渗透系数测量方面的研究，并开发大量测试装置和技术。但是，要在一个试样上同时测量吸附量、变形和渗透系数比较困难，目前还没有相关试验方法和试验装置的报道。提出煤岩吸附量–变形–渗透系数同时测量方法并开发试验装置。采用圆柱形块煤作为试验样品，利用变形传感器测定吸附引起的变形，利用双计量泵测定吸附量和渗透系数。介绍该方法的原理、试验装置及试验流程，并利用该方法和装置进行煤岩对CO2气体的吸附量、变形和渗透系数同时测量试验。试验结果表明，该方法和装置能够同时测量煤岩吸附量、变形和渗透系数，试验效果良好。

STUDY OF METHOD FOR SIMULTANEOUSLY MEASURING ADSORPTION-DEFORMATION-PERMEABILITY OF COAL

In recent years，with the increasing concern of CO2 sequestration in coalbed and enhanced coalbed methane production by gas injection technologies，lots of scholars start the research on measuring adsorption，sorption-induced deformation and permeability of coal；and a large number of test devices and technologies have been developed. However，it is difficult to measure adsorption，sorption-induced deformation and permeability on one test specimen at the same time，and there is no similar report on related method and test device. A method for simultaneously measuring adsorption，sorption-induced deformation and permeability，which uses the cylindrical block as test specimen，and deformation sensor for sorption-induced deformation measurement and dual-syringe pump for adsorption and permeability measurement，has been proposed. The principle，test device and procedure of the method have been described first，and then，a test has been carried out for simultaneously measuring adsorption，sorption-induced deformation and permeability of coal by use of CO2. The results indicate that the proposed method and test device are suitable for simultaneously measuring adsorption，sorption-induced deformation and permeability of coal，and the results are satisfying.