In order to study the macromolecule structure of Fuxin long flame coal

the CYM-9 coal sample which is closest to the average value was selected as the experimental sample by measuring the industrial analysis and elemental analysis of 12 coal samples

the Fourier transform infrared spectroscopy (FTIR)

X-ray diffraction (XRD) and uniaxial compression experiments were used to study coal samples

the microcrystalline structure parameters and mechanical properties of coal were further analyzed by comparing with the characteristics of Fushun long flame coal. The results show that the basic structure parameters of CYM-9 coal sample were as follows : aromatic hydrogen ratio (

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=33811886&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=33811888&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=33811887&type=

) was 0.47

hydrogen/atomic ratio ( H/C) was 0.858

aromatic carbon ratio (

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=33811890&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=33811897&type=

http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=33811893&type=

) was 0.747

aliphatic hydrocarbon branch length (CH

3

/CH

2

) was 0. 617

compared with Fushun long flame coal structure

its aromatic carbon ratio was larger

aromatic nucleus condensation degree was bigger

aromatic structure unit arrangement order was more regular;The XRD pattern pf coal samples had two peaks with 002 peak and 100 peak

the layer spacing(d

002

) was 0. 3816 nm

the stacking height (L

c

) was 1. 2462 nm

the layer diameter (L

a

) was 1. 0136 nm

and the number of aromatic piles (N) was 4. 26; The average peak strength of the coal sample was 9. 24MPa

the average strain value was 23. 58× 10

-3

and the average elastic modulus was 405MPa.