Experiment study on gas absorption effect promoted by temperature reducing of coal mass

in order to reduce the gas leakage volume during the coring process of the coal sample and to acurately measure the gas conent of the seam. frezing coring techmology of the coal sample was provided and a study was conducted on the environment temperature afected to the gas absopton features of the coal mas. Under the condtions of 20~10-20 and- 30 '℃ a self-made temperature controld absoption device was applied to the measurement on the gas isothermal absopton features of dfferert met ancrphic degree anthracte callean coal and gas fat cal. An analysis was conducted on the environment temperature affected to the gas absoption features of the coal mss and a study was conduced on the effect law of the cal temperature reduction to promote the gas absopton.The studly results showed ththegas saturaled absoption volume ofcal would be increased in linear with the temperature reduced and when the unit temperature reduced,the saturated absoption volume of the gas fat coa, lean cal nd anthracte cal woud be individually increased by0.130,0.148 and 0.189 cm3i g: When the environment temperature reduced.the gas absopion balance pressure inceased,.incremental percentage of gas absoption frstly would be rapidly reduced and then would be slowly reduceduntil in stable.The temperature reducion would promote the gas absoption and the lower environment temperature would be obviously promoe the gas absorption effct of ca . Under the same absoption balance pressure incremenal percenage of gas absoption with unit temperature reduced would be only relatedto the coal prop:rty and could not be related to the temperature environment.