Microfabrics response of coal to magma among coal seam Ⅷ in Yuandian Mine of Huaibei City,China

Some samples of cataclastic coal,zetar coal,cokeite and Magma coke were retrieved from coal seam Ⅷ to characterize the signature of microscopic image and Raman spectroscopy for reshaping the microfabrics response of coal to magma in Yuandian Mine. The results show several points as follows:a) the values of ID range from 3 500 to 7 300 and the range of IG are from 5 000 to 12 000 in cataclastic coals which are composed of telocollinite and microcracks vein;b) the values of ID and IG are both between 1 000 and 3 500 in zetar coal which are consist of corpovitrinite and zetar;c) the values of ID range from 430 to 700 and the range of IG are from 380 to 650 in cokeite which are made up of carbonaceous,bubbles and zetar droplet;d) the values of ID are 920-1 560 while the values of IG are 640-910 in magma coke,which are formed with coking substrate,small bubbles and mineral spheres. Consequences above display that the metamorphisms tend to magma transform from rupture and broken in cataclastic coal and zetar coal to soften and molten in cokeite and magma coke. It indicates that the intensity of alteration in coal and defects in coal molecules increase rapidly.