STUDY OF METHOD FOR SIMULTANEOUSLY MEASURING ADSORPTION-DEFORMATION-PERMEABILITY OF COAL
FANG Zhiming1，LI Xiaochun1，BAI Bing2
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. School of Resources and Safety Engineering，Central South University，Changsha，Hunan 410083，China)
Abstract：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.
