中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2013年
7期
1-4,64
,共5页
韧性变形%比表面积%总孔体积%原生结构煤%构造煤
韌性變形%比錶麵積%總孔體積%原生結構煤%構造煤
인성변형%비표면적%총공체적%원생결구매%구조매
ductile deformation%specific surface%total pore volume%primary structural coal%tectonoclastic coal
煤的孔隙结构和比表面积不仅影响煤层气吸附与储集能力，而且对气体渗流和扩散有重要的控制作用。通过对芦岭煤矿8，9煤层煤样低温液氮实验，对比分析了原生结构煤和不同变形强度构造煤的孔隙结构与比表面积的变化。结果表明，构造煤的比表面积和总孔体积平均值是原生结构煤的2.95倍和3.84倍。随着煤体韧性变形强度增加，构造煤的比表面积逐渐增大，微孔占比增加，小孔和中孔占比较少，总孔体积变化以糜棱煤为界呈现先增加后减小的特点。
煤的孔隙結構和比錶麵積不僅影響煤層氣吸附與儲集能力，而且對氣體滲流和擴散有重要的控製作用。通過對蘆嶺煤礦8，9煤層煤樣低溫液氮實驗，對比分析瞭原生結構煤和不同變形彊度構造煤的孔隙結構與比錶麵積的變化。結果錶明，構造煤的比錶麵積和總孔體積平均值是原生結構煤的2.95倍和3.84倍。隨著煤體韌性變形彊度增加，構造煤的比錶麵積逐漸增大，微孔佔比增加，小孔和中孔佔比較少，總孔體積變化以糜稜煤為界呈現先增加後減小的特點。
매적공극결구화비표면적불부영향매층기흡부여저집능력，이차대기체삼류화확산유중요적공제작용。통과대호령매광8，9매층매양저온액담실험，대비분석료원생결구매화불동변형강도구조매적공극결구여비표면적적변화。결과표명，구조매적비표면적화총공체적평균치시원생결구매적2.95배화3.84배。수착매체인성변형강도증가，구조매적비표면적축점증대，미공점비증가，소공화중공점비교소，총공체적변화이미릉매위계정현선증가후감소적특점。
Pore geometry and specific surface of coal can impact not only CBM adsorption, but also control gas percolation and diffusion. Through coal samples low-temperature nitrogen adsorption test of coal Nos.8 and 9 in the Luling coalmine, contrastively analyzed pore geometry and specific surface differences between primary structural coal and tectonoclastic coal with different deformation intensities. The result has shown that the average specific surface and total pore volume of tectonoclastic coal are 2.95 and 3.84 times larger than that of primary structural coal respectively. Along with the increasing of coal mass ductile deformation intensity, tectonoclastic coal spe-cific surface increased gradually, the ratio of micropore also increased, while small and medium pores decreased. Taking the mylonitic coal as the interfluve, variation of total pore volume presents a peculiarity of increased first then decreased.
