CAJ | 학술논문

对5种单种煤在不同堆密度下Y值、胶质层体积曲线及X值的变化规律进行了研究，结果表明：当堆密度从0．75t/m3增加到12．0t/m 3时，气煤、1/3焦煤、肥煤和焦煤的Y值分别增加了2．5mm、5．0mm、6．3mm和5．8mm，而瘦煤无明显增加；1/3焦煤的胶质层体积曲线由“之”型向“山”型转变，使其胶质体性质向肥煤靠近，气煤、肥煤、焦煤和瘦煤的体积曲线无明显变化；增加煤料的堆密度可显著减小各单种煤的 X值，且气煤、1/3焦煤、肥煤和焦煤结焦过程中均表现出明显的正膨胀性。
대5충단충매재불동퇴밀도하Y치、효질층체적곡선급X치적변화규률진행료연구，결과표명：당퇴밀도종0．75t/m3증가도12．0t/m 3시，기매、1/3초매、비매화초매적Y치분별증가료2．5mm、5．0mm、6．3mm화5．8mm，이수매무명현증가；1/3초매적효질층체적곡선유“지”형향“산”형전변，사기효질체성질향비매고근，기매、비매、초매화수매적체적곡선무명현변화；증가매료적퇴밀도가현저감소각단충매적 X치，차기매、1/3초매、비매화초매결초과정중균표현출명현적정팽창성。
The changes of Y value, volume curve of gelatinous layer and X value of five individual coals under different bulk density are studied .The result shows that when the bulk density is in-creased from 0.75t/m 3to 1.2 t/m 3,Y value of gas coal,1/3 coking coal,fat coal and coking coal in-creases by 2.5mm,5.0mm, 6.3mm and 5.8mm respectively,while there is no significant increase for lean coal;the volume curve of plastic layer for 1/3 coking coal changes from zigzag mountain type , which indicates that with the increase of bulk density ,the plastic layer property of 1/3 coking coal is similar with that of fat coal ,while the plastic layer property of gas coal ,fat coal ,coking coal and lean coal doesn ’ t change too much;X value of all the five individual coals decreases obviously with the in-crease of bulk density ,and gas coal ,1/3 coking coal fat coal and coking coal show obvious positive expansion during coking process .