1Research on the main coal quality indicators distribution characteristics of No.9 coal seam in Santanghu coal fieldZHOU Zi-xin, ZHANG Wei, LI Rui-ming, LI Sai-ge1-52Grindability research for minerals and organic components in low rank coalCHEN Hong-bo6-8,123Coal quality characteristics and liquefaction properties of Guojiawan exploration area in Shenfu mining areaWEI Yun-xun9-124Research on the distribution of fluorine in coal and the occurrence regularityZHONG Fang-jun, LUO Xing-fa13-16,465Cleanliness grade and distribution characteristics of No.5 -3 coal seam in Hexingliang mine field of northern ShaanxiLI Jing-qin, ZHANG Li-wei, LI Ming-pei17-206Discussion on how the pore fissure development and coal metamorphic degree affected the coal reservoir permeability in a mining area in Pan County Guizhou ProvinceCHANG Xi-xi21-24,287Study on absorption behavior of coalbed gas under 17 variable temperature and pressure conditionsMIAO Ze-kai, LI Dong, WANG Zhen25-288Study on determination of carbon and hydrogen in solid biofuels by coulometric-gravimetric methodREN Xiang-jun, JIN Hong, DAI Zhao-bin, WANG Jian, KANG Ning29-379Research and application of large-size coal sample division machine in coal sampling and sample preparations deviceZHANG Hao38-4110Discussion on design method of PLC control system for coal mechanized sampling and sample preparationHU Zhi-Wei42-4611Study on effect of different conditions of acid hydrolysis on determination of phosphorus in coalZHANG Bo, ZHENG Yan-li47-49,6912Study on coal online trading of Shanxi coking coal groupFAN Zheng-jun50-51,6913Analysis on operation effect of low rank coal used in vertical pulverized coal industrial boiler52-54,5914Environmental protection requirements in coal preparation project designXU Jian-jun, LIU Tao, LIANG Liao, LI Jian-gang, WANG Jia-yin55-5915Design discussion of process for Hecaogou coal preparation plantBAO Yong-hong, SUN Zai-zheng, CHONG Hong-wei60-62,7216Feasibility analysis of lump coal TDS intelligent dry coal preparation in Shuguang Coal MineHAO Ming-jing63-6517Experimental study on new agents flotation of Guandi coal preparation plantWANG LI-hong66-6918Practice of reducing the moisture content of clean coal in heavy medium coal preparation plant of Aiweier channelZHANG Chang-ming70-72 